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30234f0925
Trying to move in the direction of using callchain_param for all callchain parameters, eventually ditching them from symbol_conf. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-kixllia6r26mz45ng056zq7z@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
1042 lines
23 KiB
C
1042 lines
23 KiB
C
/*
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* Copyright (C) 2009-2011, Frederic Weisbecker <fweisbec@gmail.com>
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*
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* Handle the callchains from the stream in an ad-hoc radix tree and then
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* sort them in an rbtree.
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*
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* Using a radix for code path provides a fast retrieval and factorizes
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* memory use. Also that lets us use the paths in a hierarchical graph view.
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*
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdbool.h>
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#include <errno.h>
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#include <math.h>
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#include "asm/bug.h"
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#include "hist.h"
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#include "util.h"
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#include "sort.h"
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#include "machine.h"
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#include "callchain.h"
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__thread struct callchain_cursor callchain_cursor;
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int parse_callchain_record_opt(const char *arg, struct callchain_param *param)
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{
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return parse_callchain_record(arg, param);
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}
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static int parse_callchain_mode(const char *value)
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{
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if (!strncmp(value, "graph", strlen(value))) {
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callchain_param.mode = CHAIN_GRAPH_ABS;
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return 0;
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}
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if (!strncmp(value, "flat", strlen(value))) {
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callchain_param.mode = CHAIN_FLAT;
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return 0;
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}
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if (!strncmp(value, "fractal", strlen(value))) {
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callchain_param.mode = CHAIN_GRAPH_REL;
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return 0;
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}
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if (!strncmp(value, "folded", strlen(value))) {
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callchain_param.mode = CHAIN_FOLDED;
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return 0;
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}
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return -1;
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}
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static int parse_callchain_order(const char *value)
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{
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if (!strncmp(value, "caller", strlen(value))) {
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callchain_param.order = ORDER_CALLER;
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callchain_param.order_set = true;
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return 0;
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}
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if (!strncmp(value, "callee", strlen(value))) {
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callchain_param.order = ORDER_CALLEE;
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callchain_param.order_set = true;
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return 0;
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}
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return -1;
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}
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static int parse_callchain_sort_key(const char *value)
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{
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if (!strncmp(value, "function", strlen(value))) {
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callchain_param.key = CCKEY_FUNCTION;
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return 0;
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}
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if (!strncmp(value, "address", strlen(value))) {
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callchain_param.key = CCKEY_ADDRESS;
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return 0;
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}
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if (!strncmp(value, "branch", strlen(value))) {
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callchain_param.branch_callstack = 1;
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return 0;
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}
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return -1;
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}
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static int parse_callchain_value(const char *value)
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{
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if (!strncmp(value, "percent", strlen(value))) {
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callchain_param.value = CCVAL_PERCENT;
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return 0;
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}
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if (!strncmp(value, "period", strlen(value))) {
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callchain_param.value = CCVAL_PERIOD;
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return 0;
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}
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if (!strncmp(value, "count", strlen(value))) {
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callchain_param.value = CCVAL_COUNT;
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return 0;
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}
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return -1;
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}
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static int
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__parse_callchain_report_opt(const char *arg, bool allow_record_opt)
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{
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char *tok;
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char *endptr;
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bool minpcnt_set = false;
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bool record_opt_set = false;
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bool try_stack_size = false;
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callchain_param.enabled = true;
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symbol_conf.use_callchain = true;
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if (!arg)
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return 0;
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while ((tok = strtok((char *)arg, ",")) != NULL) {
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if (!strncmp(tok, "none", strlen(tok))) {
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callchain_param.mode = CHAIN_NONE;
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callchain_param.enabled = false;
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symbol_conf.use_callchain = false;
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return 0;
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}
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if (!parse_callchain_mode(tok) ||
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!parse_callchain_order(tok) ||
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!parse_callchain_sort_key(tok) ||
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!parse_callchain_value(tok)) {
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/* parsing ok - move on to the next */
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try_stack_size = false;
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goto next;
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} else if (allow_record_opt && !record_opt_set) {
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if (parse_callchain_record(tok, &callchain_param))
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goto try_numbers;
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/* assume that number followed by 'dwarf' is stack size */
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if (callchain_param.record_mode == CALLCHAIN_DWARF)
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try_stack_size = true;
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record_opt_set = true;
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goto next;
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}
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try_numbers:
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if (try_stack_size) {
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unsigned long size = 0;
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if (get_stack_size(tok, &size) < 0)
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return -1;
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callchain_param.dump_size = size;
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try_stack_size = false;
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} else if (!minpcnt_set) {
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/* try to get the min percent */
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callchain_param.min_percent = strtod(tok, &endptr);
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if (tok == endptr)
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return -1;
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minpcnt_set = true;
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} else {
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/* try print limit at last */
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callchain_param.print_limit = strtoul(tok, &endptr, 0);
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if (tok == endptr)
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return -1;
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}
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next:
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arg = NULL;
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}
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if (callchain_register_param(&callchain_param) < 0) {
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pr_err("Can't register callchain params\n");
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return -1;
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}
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return 0;
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}
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int parse_callchain_report_opt(const char *arg)
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{
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return __parse_callchain_report_opt(arg, false);
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}
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int parse_callchain_top_opt(const char *arg)
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{
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return __parse_callchain_report_opt(arg, true);
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}
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int perf_callchain_config(const char *var, const char *value)
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{
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char *endptr;
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if (prefixcmp(var, "call-graph."))
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return 0;
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var += sizeof("call-graph.") - 1;
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if (!strcmp(var, "record-mode"))
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return parse_callchain_record_opt(value, &callchain_param);
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#ifdef HAVE_DWARF_UNWIND_SUPPORT
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if (!strcmp(var, "dump-size")) {
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unsigned long size = 0;
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int ret;
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ret = get_stack_size(value, &size);
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callchain_param.dump_size = size;
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return ret;
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}
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#endif
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if (!strcmp(var, "print-type"))
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return parse_callchain_mode(value);
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if (!strcmp(var, "order"))
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return parse_callchain_order(value);
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if (!strcmp(var, "sort-key"))
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return parse_callchain_sort_key(value);
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if (!strcmp(var, "threshold")) {
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callchain_param.min_percent = strtod(value, &endptr);
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if (value == endptr)
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return -1;
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}
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if (!strcmp(var, "print-limit")) {
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callchain_param.print_limit = strtod(value, &endptr);
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if (value == endptr)
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return -1;
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}
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return 0;
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}
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static void
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rb_insert_callchain(struct rb_root *root, struct callchain_node *chain,
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enum chain_mode mode)
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{
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struct rb_node **p = &root->rb_node;
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struct rb_node *parent = NULL;
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struct callchain_node *rnode;
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u64 chain_cumul = callchain_cumul_hits(chain);
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while (*p) {
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u64 rnode_cumul;
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parent = *p;
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rnode = rb_entry(parent, struct callchain_node, rb_node);
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rnode_cumul = callchain_cumul_hits(rnode);
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switch (mode) {
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case CHAIN_FLAT:
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case CHAIN_FOLDED:
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if (rnode->hit < chain->hit)
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p = &(*p)->rb_left;
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else
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p = &(*p)->rb_right;
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break;
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case CHAIN_GRAPH_ABS: /* Falldown */
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case CHAIN_GRAPH_REL:
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if (rnode_cumul < chain_cumul)
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p = &(*p)->rb_left;
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else
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p = &(*p)->rb_right;
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break;
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case CHAIN_NONE:
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default:
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break;
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}
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}
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rb_link_node(&chain->rb_node, parent, p);
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rb_insert_color(&chain->rb_node, root);
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}
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static void
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__sort_chain_flat(struct rb_root *rb_root, struct callchain_node *node,
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u64 min_hit)
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{
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struct rb_node *n;
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struct callchain_node *child;
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n = rb_first(&node->rb_root_in);
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while (n) {
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child = rb_entry(n, struct callchain_node, rb_node_in);
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n = rb_next(n);
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__sort_chain_flat(rb_root, child, min_hit);
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}
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if (node->hit && node->hit >= min_hit)
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rb_insert_callchain(rb_root, node, CHAIN_FLAT);
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}
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/*
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* Once we get every callchains from the stream, we can now
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* sort them by hit
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*/
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static void
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sort_chain_flat(struct rb_root *rb_root, struct callchain_root *root,
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u64 min_hit, struct callchain_param *param __maybe_unused)
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{
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*rb_root = RB_ROOT;
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__sort_chain_flat(rb_root, &root->node, min_hit);
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}
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static void __sort_chain_graph_abs(struct callchain_node *node,
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u64 min_hit)
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{
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struct rb_node *n;
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struct callchain_node *child;
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node->rb_root = RB_ROOT;
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n = rb_first(&node->rb_root_in);
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while (n) {
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child = rb_entry(n, struct callchain_node, rb_node_in);
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n = rb_next(n);
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__sort_chain_graph_abs(child, min_hit);
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if (callchain_cumul_hits(child) >= min_hit)
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rb_insert_callchain(&node->rb_root, child,
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CHAIN_GRAPH_ABS);
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}
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}
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static void
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sort_chain_graph_abs(struct rb_root *rb_root, struct callchain_root *chain_root,
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u64 min_hit, struct callchain_param *param __maybe_unused)
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{
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__sort_chain_graph_abs(&chain_root->node, min_hit);
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rb_root->rb_node = chain_root->node.rb_root.rb_node;
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}
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static void __sort_chain_graph_rel(struct callchain_node *node,
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double min_percent)
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{
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struct rb_node *n;
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struct callchain_node *child;
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u64 min_hit;
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node->rb_root = RB_ROOT;
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min_hit = ceil(node->children_hit * min_percent);
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n = rb_first(&node->rb_root_in);
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while (n) {
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child = rb_entry(n, struct callchain_node, rb_node_in);
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n = rb_next(n);
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__sort_chain_graph_rel(child, min_percent);
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if (callchain_cumul_hits(child) >= min_hit)
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rb_insert_callchain(&node->rb_root, child,
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CHAIN_GRAPH_REL);
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}
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}
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static void
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sort_chain_graph_rel(struct rb_root *rb_root, struct callchain_root *chain_root,
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u64 min_hit __maybe_unused, struct callchain_param *param)
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{
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__sort_chain_graph_rel(&chain_root->node, param->min_percent / 100.0);
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rb_root->rb_node = chain_root->node.rb_root.rb_node;
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}
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int callchain_register_param(struct callchain_param *param)
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{
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switch (param->mode) {
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case CHAIN_GRAPH_ABS:
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param->sort = sort_chain_graph_abs;
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break;
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case CHAIN_GRAPH_REL:
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param->sort = sort_chain_graph_rel;
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break;
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case CHAIN_FLAT:
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case CHAIN_FOLDED:
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param->sort = sort_chain_flat;
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break;
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case CHAIN_NONE:
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default:
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return -1;
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}
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return 0;
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}
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/*
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* Create a child for a parent. If inherit_children, then the new child
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* will become the new parent of it's parent children
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*/
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static struct callchain_node *
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create_child(struct callchain_node *parent, bool inherit_children)
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{
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struct callchain_node *new;
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new = zalloc(sizeof(*new));
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if (!new) {
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perror("not enough memory to create child for code path tree");
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return NULL;
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}
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new->parent = parent;
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INIT_LIST_HEAD(&new->val);
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INIT_LIST_HEAD(&new->parent_val);
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if (inherit_children) {
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struct rb_node *n;
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struct callchain_node *child;
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new->rb_root_in = parent->rb_root_in;
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parent->rb_root_in = RB_ROOT;
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n = rb_first(&new->rb_root_in);
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while (n) {
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child = rb_entry(n, struct callchain_node, rb_node_in);
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child->parent = new;
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n = rb_next(n);
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}
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/* make it the first child */
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rb_link_node(&new->rb_node_in, NULL, &parent->rb_root_in.rb_node);
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rb_insert_color(&new->rb_node_in, &parent->rb_root_in);
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}
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return new;
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}
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/*
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* Fill the node with callchain values
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*/
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static int
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fill_node(struct callchain_node *node, struct callchain_cursor *cursor)
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{
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struct callchain_cursor_node *cursor_node;
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node->val_nr = cursor->nr - cursor->pos;
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if (!node->val_nr)
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pr_warning("Warning: empty node in callchain tree\n");
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cursor_node = callchain_cursor_current(cursor);
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while (cursor_node) {
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struct callchain_list *call;
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call = zalloc(sizeof(*call));
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if (!call) {
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perror("not enough memory for the code path tree");
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return -1;
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}
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call->ip = cursor_node->ip;
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call->ms.sym = cursor_node->sym;
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call->ms.map = cursor_node->map;
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list_add_tail(&call->list, &node->val);
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callchain_cursor_advance(cursor);
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cursor_node = callchain_cursor_current(cursor);
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}
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return 0;
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}
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static struct callchain_node *
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add_child(struct callchain_node *parent,
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struct callchain_cursor *cursor,
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u64 period)
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{
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struct callchain_node *new;
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new = create_child(parent, false);
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if (new == NULL)
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return NULL;
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if (fill_node(new, cursor) < 0) {
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struct callchain_list *call, *tmp;
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list_for_each_entry_safe(call, tmp, &new->val, list) {
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list_del(&call->list);
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free(call);
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}
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free(new);
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return NULL;
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}
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new->children_hit = 0;
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new->hit = period;
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new->children_count = 0;
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new->count = 1;
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return new;
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}
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enum match_result {
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MATCH_ERROR = -1,
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MATCH_EQ,
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MATCH_LT,
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MATCH_GT,
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};
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static enum match_result match_chain(struct callchain_cursor_node *node,
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struct callchain_list *cnode)
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{
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struct symbol *sym = node->sym;
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u64 left, right;
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if (cnode->ms.sym && sym &&
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callchain_param.key == CCKEY_FUNCTION) {
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left = cnode->ms.sym->start;
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right = sym->start;
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} else {
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left = cnode->ip;
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right = node->ip;
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}
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|
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if (left == right)
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return MATCH_EQ;
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|
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return left > right ? MATCH_GT : MATCH_LT;
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}
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/*
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* Split the parent in two parts (a new child is created) and
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* give a part of its callchain to the created child.
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* Then create another child to host the given callchain of new branch
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*/
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static int
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split_add_child(struct callchain_node *parent,
|
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struct callchain_cursor *cursor,
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struct callchain_list *to_split,
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u64 idx_parents, u64 idx_local, u64 period)
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{
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struct callchain_node *new;
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struct list_head *old_tail;
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unsigned int idx_total = idx_parents + idx_local;
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|
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/* split */
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new = create_child(parent, true);
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if (new == NULL)
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return -1;
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|
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/* split the callchain and move a part to the new child */
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old_tail = parent->val.prev;
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list_del_range(&to_split->list, old_tail);
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new->val.next = &to_split->list;
|
|
new->val.prev = old_tail;
|
|
to_split->list.prev = &new->val;
|
|
old_tail->next = &new->val;
|
|
|
|
/* split the hits */
|
|
new->hit = parent->hit;
|
|
new->children_hit = parent->children_hit;
|
|
parent->children_hit = callchain_cumul_hits(new);
|
|
new->val_nr = parent->val_nr - idx_local;
|
|
parent->val_nr = idx_local;
|
|
new->count = parent->count;
|
|
new->children_count = parent->children_count;
|
|
parent->children_count = callchain_cumul_counts(new);
|
|
|
|
/* create a new child for the new branch if any */
|
|
if (idx_total < cursor->nr) {
|
|
struct callchain_node *first;
|
|
struct callchain_list *cnode;
|
|
struct callchain_cursor_node *node;
|
|
struct rb_node *p, **pp;
|
|
|
|
parent->hit = 0;
|
|
parent->children_hit += period;
|
|
parent->count = 0;
|
|
parent->children_count += 1;
|
|
|
|
node = callchain_cursor_current(cursor);
|
|
new = add_child(parent, cursor, period);
|
|
if (new == NULL)
|
|
return -1;
|
|
|
|
/*
|
|
* This is second child since we moved parent's children
|
|
* to new (first) child above.
|
|
*/
|
|
p = parent->rb_root_in.rb_node;
|
|
first = rb_entry(p, struct callchain_node, rb_node_in);
|
|
cnode = list_first_entry(&first->val, struct callchain_list,
|
|
list);
|
|
|
|
if (match_chain(node, cnode) == MATCH_LT)
|
|
pp = &p->rb_left;
|
|
else
|
|
pp = &p->rb_right;
|
|
|
|
rb_link_node(&new->rb_node_in, p, pp);
|
|
rb_insert_color(&new->rb_node_in, &parent->rb_root_in);
|
|
} else {
|
|
parent->hit = period;
|
|
parent->count = 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static enum match_result
|
|
append_chain(struct callchain_node *root,
|
|
struct callchain_cursor *cursor,
|
|
u64 period);
|
|
|
|
static int
|
|
append_chain_children(struct callchain_node *root,
|
|
struct callchain_cursor *cursor,
|
|
u64 period)
|
|
{
|
|
struct callchain_node *rnode;
|
|
struct callchain_cursor_node *node;
|
|
struct rb_node **p = &root->rb_root_in.rb_node;
|
|
struct rb_node *parent = NULL;
|
|
|
|
node = callchain_cursor_current(cursor);
|
|
if (!node)
|
|
return -1;
|
|
|
|
/* lookup in childrens */
|
|
while (*p) {
|
|
enum match_result ret;
|
|
|
|
parent = *p;
|
|
rnode = rb_entry(parent, struct callchain_node, rb_node_in);
|
|
|
|
/* If at least first entry matches, rely to children */
|
|
ret = append_chain(rnode, cursor, period);
|
|
if (ret == MATCH_EQ)
|
|
goto inc_children_hit;
|
|
if (ret == MATCH_ERROR)
|
|
return -1;
|
|
|
|
if (ret == MATCH_LT)
|
|
p = &parent->rb_left;
|
|
else
|
|
p = &parent->rb_right;
|
|
}
|
|
/* nothing in children, add to the current node */
|
|
rnode = add_child(root, cursor, period);
|
|
if (rnode == NULL)
|
|
return -1;
|
|
|
|
rb_link_node(&rnode->rb_node_in, parent, p);
|
|
rb_insert_color(&rnode->rb_node_in, &root->rb_root_in);
|
|
|
|
inc_children_hit:
|
|
root->children_hit += period;
|
|
root->children_count++;
|
|
return 0;
|
|
}
|
|
|
|
static enum match_result
|
|
append_chain(struct callchain_node *root,
|
|
struct callchain_cursor *cursor,
|
|
u64 period)
|
|
{
|
|
struct callchain_list *cnode;
|
|
u64 start = cursor->pos;
|
|
bool found = false;
|
|
u64 matches;
|
|
enum match_result cmp = MATCH_ERROR;
|
|
|
|
/*
|
|
* Lookup in the current node
|
|
* If we have a symbol, then compare the start to match
|
|
* anywhere inside a function, unless function
|
|
* mode is disabled.
|
|
*/
|
|
list_for_each_entry(cnode, &root->val, list) {
|
|
struct callchain_cursor_node *node;
|
|
|
|
node = callchain_cursor_current(cursor);
|
|
if (!node)
|
|
break;
|
|
|
|
cmp = match_chain(node, cnode);
|
|
if (cmp != MATCH_EQ)
|
|
break;
|
|
|
|
found = true;
|
|
|
|
callchain_cursor_advance(cursor);
|
|
}
|
|
|
|
/* matches not, relay no the parent */
|
|
if (!found) {
|
|
WARN_ONCE(cmp == MATCH_ERROR, "Chain comparison error\n");
|
|
return cmp;
|
|
}
|
|
|
|
matches = cursor->pos - start;
|
|
|
|
/* we match only a part of the node. Split it and add the new chain */
|
|
if (matches < root->val_nr) {
|
|
if (split_add_child(root, cursor, cnode, start, matches,
|
|
period) < 0)
|
|
return MATCH_ERROR;
|
|
|
|
return MATCH_EQ;
|
|
}
|
|
|
|
/* we match 100% of the path, increment the hit */
|
|
if (matches == root->val_nr && cursor->pos == cursor->nr) {
|
|
root->hit += period;
|
|
root->count++;
|
|
return MATCH_EQ;
|
|
}
|
|
|
|
/* We match the node and still have a part remaining */
|
|
if (append_chain_children(root, cursor, period) < 0)
|
|
return MATCH_ERROR;
|
|
|
|
return MATCH_EQ;
|
|
}
|
|
|
|
int callchain_append(struct callchain_root *root,
|
|
struct callchain_cursor *cursor,
|
|
u64 period)
|
|
{
|
|
if (!cursor->nr)
|
|
return 0;
|
|
|
|
callchain_cursor_commit(cursor);
|
|
|
|
if (append_chain_children(&root->node, cursor, period) < 0)
|
|
return -1;
|
|
|
|
if (cursor->nr > root->max_depth)
|
|
root->max_depth = cursor->nr;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
merge_chain_branch(struct callchain_cursor *cursor,
|
|
struct callchain_node *dst, struct callchain_node *src)
|
|
{
|
|
struct callchain_cursor_node **old_last = cursor->last;
|
|
struct callchain_node *child;
|
|
struct callchain_list *list, *next_list;
|
|
struct rb_node *n;
|
|
int old_pos = cursor->nr;
|
|
int err = 0;
|
|
|
|
list_for_each_entry_safe(list, next_list, &src->val, list) {
|
|
callchain_cursor_append(cursor, list->ip,
|
|
list->ms.map, list->ms.sym);
|
|
list_del(&list->list);
|
|
free(list);
|
|
}
|
|
|
|
if (src->hit) {
|
|
callchain_cursor_commit(cursor);
|
|
if (append_chain_children(dst, cursor, src->hit) < 0)
|
|
return -1;
|
|
}
|
|
|
|
n = rb_first(&src->rb_root_in);
|
|
while (n) {
|
|
child = container_of(n, struct callchain_node, rb_node_in);
|
|
n = rb_next(n);
|
|
rb_erase(&child->rb_node_in, &src->rb_root_in);
|
|
|
|
err = merge_chain_branch(cursor, dst, child);
|
|
if (err)
|
|
break;
|
|
|
|
free(child);
|
|
}
|
|
|
|
cursor->nr = old_pos;
|
|
cursor->last = old_last;
|
|
|
|
return err;
|
|
}
|
|
|
|
int callchain_merge(struct callchain_cursor *cursor,
|
|
struct callchain_root *dst, struct callchain_root *src)
|
|
{
|
|
return merge_chain_branch(cursor, &dst->node, &src->node);
|
|
}
|
|
|
|
int callchain_cursor_append(struct callchain_cursor *cursor,
|
|
u64 ip, struct map *map, struct symbol *sym)
|
|
{
|
|
struct callchain_cursor_node *node = *cursor->last;
|
|
|
|
if (!node) {
|
|
node = calloc(1, sizeof(*node));
|
|
if (!node)
|
|
return -ENOMEM;
|
|
|
|
*cursor->last = node;
|
|
}
|
|
|
|
node->ip = ip;
|
|
node->map = map;
|
|
node->sym = sym;
|
|
|
|
cursor->nr++;
|
|
|
|
cursor->last = &node->next;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int sample__resolve_callchain(struct perf_sample *sample,
|
|
struct callchain_cursor *cursor, struct symbol **parent,
|
|
struct perf_evsel *evsel, struct addr_location *al,
|
|
int max_stack)
|
|
{
|
|
if (sample->callchain == NULL)
|
|
return 0;
|
|
|
|
if (symbol_conf.use_callchain || symbol_conf.cumulate_callchain ||
|
|
sort__has_parent) {
|
|
return thread__resolve_callchain(al->thread, cursor, evsel, sample,
|
|
parent, al, max_stack);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int hist_entry__append_callchain(struct hist_entry *he, struct perf_sample *sample)
|
|
{
|
|
if (!symbol_conf.use_callchain || sample->callchain == NULL)
|
|
return 0;
|
|
return callchain_append(he->callchain, &callchain_cursor, sample->period);
|
|
}
|
|
|
|
int fill_callchain_info(struct addr_location *al, struct callchain_cursor_node *node,
|
|
bool hide_unresolved)
|
|
{
|
|
al->map = node->map;
|
|
al->sym = node->sym;
|
|
if (node->map)
|
|
al->addr = node->map->map_ip(node->map, node->ip);
|
|
else
|
|
al->addr = node->ip;
|
|
|
|
if (al->sym == NULL) {
|
|
if (hide_unresolved)
|
|
return 0;
|
|
if (al->map == NULL)
|
|
goto out;
|
|
}
|
|
|
|
if (al->map->groups == &al->machine->kmaps) {
|
|
if (machine__is_host(al->machine)) {
|
|
al->cpumode = PERF_RECORD_MISC_KERNEL;
|
|
al->level = 'k';
|
|
} else {
|
|
al->cpumode = PERF_RECORD_MISC_GUEST_KERNEL;
|
|
al->level = 'g';
|
|
}
|
|
} else {
|
|
if (machine__is_host(al->machine)) {
|
|
al->cpumode = PERF_RECORD_MISC_USER;
|
|
al->level = '.';
|
|
} else if (perf_guest) {
|
|
al->cpumode = PERF_RECORD_MISC_GUEST_USER;
|
|
al->level = 'u';
|
|
} else {
|
|
al->cpumode = PERF_RECORD_MISC_HYPERVISOR;
|
|
al->level = 'H';
|
|
}
|
|
}
|
|
|
|
out:
|
|
return 1;
|
|
}
|
|
|
|
char *callchain_list__sym_name(struct callchain_list *cl,
|
|
char *bf, size_t bfsize, bool show_dso)
|
|
{
|
|
int printed;
|
|
|
|
if (cl->ms.sym) {
|
|
if (callchain_param.key == CCKEY_ADDRESS &&
|
|
cl->ms.map && !cl->srcline)
|
|
cl->srcline = get_srcline(cl->ms.map->dso,
|
|
map__rip_2objdump(cl->ms.map,
|
|
cl->ip),
|
|
cl->ms.sym, false);
|
|
if (cl->srcline)
|
|
printed = scnprintf(bf, bfsize, "%s %s",
|
|
cl->ms.sym->name, cl->srcline);
|
|
else
|
|
printed = scnprintf(bf, bfsize, "%s", cl->ms.sym->name);
|
|
} else
|
|
printed = scnprintf(bf, bfsize, "%#" PRIx64, cl->ip);
|
|
|
|
if (show_dso)
|
|
scnprintf(bf + printed, bfsize - printed, " %s",
|
|
cl->ms.map ?
|
|
cl->ms.map->dso->short_name :
|
|
"unknown");
|
|
|
|
return bf;
|
|
}
|
|
|
|
char *callchain_node__scnprintf_value(struct callchain_node *node,
|
|
char *bf, size_t bfsize, u64 total)
|
|
{
|
|
double percent = 0.0;
|
|
u64 period = callchain_cumul_hits(node);
|
|
unsigned count = callchain_cumul_counts(node);
|
|
|
|
if (callchain_param.mode == CHAIN_FOLDED) {
|
|
period = node->hit;
|
|
count = node->count;
|
|
}
|
|
|
|
switch (callchain_param.value) {
|
|
case CCVAL_PERIOD:
|
|
scnprintf(bf, bfsize, "%"PRIu64, period);
|
|
break;
|
|
case CCVAL_COUNT:
|
|
scnprintf(bf, bfsize, "%u", count);
|
|
break;
|
|
case CCVAL_PERCENT:
|
|
default:
|
|
if (total)
|
|
percent = period * 100.0 / total;
|
|
scnprintf(bf, bfsize, "%.2f%%", percent);
|
|
break;
|
|
}
|
|
return bf;
|
|
}
|
|
|
|
int callchain_node__fprintf_value(struct callchain_node *node,
|
|
FILE *fp, u64 total)
|
|
{
|
|
double percent = 0.0;
|
|
u64 period = callchain_cumul_hits(node);
|
|
unsigned count = callchain_cumul_counts(node);
|
|
|
|
if (callchain_param.mode == CHAIN_FOLDED) {
|
|
period = node->hit;
|
|
count = node->count;
|
|
}
|
|
|
|
switch (callchain_param.value) {
|
|
case CCVAL_PERIOD:
|
|
return fprintf(fp, "%"PRIu64, period);
|
|
case CCVAL_COUNT:
|
|
return fprintf(fp, "%u", count);
|
|
case CCVAL_PERCENT:
|
|
default:
|
|
if (total)
|
|
percent = period * 100.0 / total;
|
|
return percent_color_fprintf(fp, "%.2f%%", percent);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void free_callchain_node(struct callchain_node *node)
|
|
{
|
|
struct callchain_list *list, *tmp;
|
|
struct callchain_node *child;
|
|
struct rb_node *n;
|
|
|
|
list_for_each_entry_safe(list, tmp, &node->parent_val, list) {
|
|
list_del(&list->list);
|
|
free(list);
|
|
}
|
|
|
|
list_for_each_entry_safe(list, tmp, &node->val, list) {
|
|
list_del(&list->list);
|
|
free(list);
|
|
}
|
|
|
|
n = rb_first(&node->rb_root_in);
|
|
while (n) {
|
|
child = container_of(n, struct callchain_node, rb_node_in);
|
|
n = rb_next(n);
|
|
rb_erase(&child->rb_node_in, &node->rb_root_in);
|
|
|
|
free_callchain_node(child);
|
|
free(child);
|
|
}
|
|
}
|
|
|
|
void free_callchain(struct callchain_root *root)
|
|
{
|
|
if (!symbol_conf.use_callchain)
|
|
return;
|
|
|
|
free_callchain_node(&root->node);
|
|
}
|
|
|
|
static u64 decay_callchain_node(struct callchain_node *node)
|
|
{
|
|
struct callchain_node *child;
|
|
struct rb_node *n;
|
|
u64 child_hits = 0;
|
|
|
|
n = rb_first(&node->rb_root_in);
|
|
while (n) {
|
|
child = container_of(n, struct callchain_node, rb_node_in);
|
|
|
|
child_hits += decay_callchain_node(child);
|
|
n = rb_next(n);
|
|
}
|
|
|
|
node->hit = (node->hit * 7) / 8;
|
|
node->children_hit = child_hits;
|
|
|
|
return node->hit;
|
|
}
|
|
|
|
void decay_callchain(struct callchain_root *root)
|
|
{
|
|
if (!symbol_conf.use_callchain)
|
|
return;
|
|
|
|
decay_callchain_node(&root->node);
|
|
}
|
|
|
|
int callchain_node__make_parent_list(struct callchain_node *node)
|
|
{
|
|
struct callchain_node *parent = node->parent;
|
|
struct callchain_list *chain, *new;
|
|
LIST_HEAD(head);
|
|
|
|
while (parent) {
|
|
list_for_each_entry_reverse(chain, &parent->val, list) {
|
|
new = malloc(sizeof(*new));
|
|
if (new == NULL)
|
|
goto out;
|
|
*new = *chain;
|
|
new->has_children = false;
|
|
list_add_tail(&new->list, &head);
|
|
}
|
|
parent = parent->parent;
|
|
}
|
|
|
|
list_for_each_entry_safe_reverse(chain, new, &head, list)
|
|
list_move_tail(&chain->list, &node->parent_val);
|
|
|
|
if (!list_empty(&node->parent_val)) {
|
|
chain = list_first_entry(&node->parent_val, struct callchain_list, list);
|
|
chain->has_children = rb_prev(&node->rb_node) || rb_next(&node->rb_node);
|
|
|
|
chain = list_first_entry(&node->val, struct callchain_list, list);
|
|
chain->has_children = false;
|
|
}
|
|
return 0;
|
|
|
|
out:
|
|
list_for_each_entry_safe(chain, new, &head, list) {
|
|
list_del(&chain->list);
|
|
free(chain);
|
|
}
|
|
return -ENOMEM;
|
|
}
|