forked from Minki/linux
0c877d759d
Move meminfo's tlb display function into mem-events.c object, so it could be reused later from script code. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Andi Kleen <ak@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1456303616-26926-6-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
133 lines
2.5 KiB
C
133 lines
2.5 KiB
C
#include <stddef.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <api/fs/fs.h>
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#include "mem-events.h"
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#include "debug.h"
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#include "symbol.h"
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#define E(t, n, s) { .tag = t, .name = n, .sysfs_name = s }
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struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX] = {
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E("ldlat-loads", "cpu/mem-loads,ldlat=30/P", "mem-loads"),
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E("ldlat-stores", "cpu/mem-stores/P", "mem-stores"),
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};
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#undef E
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#undef E
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char *perf_mem_events__name(int i)
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{
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return (char *)perf_mem_events[i].name;
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}
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int perf_mem_events__parse(const char *str)
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{
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char *tok, *saveptr = NULL;
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bool found = false;
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char *buf;
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int j;
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/* We need buffer that we know we can write to. */
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buf = malloc(strlen(str) + 1);
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if (!buf)
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return -ENOMEM;
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strcpy(buf, str);
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tok = strtok_r((char *)buf, ",", &saveptr);
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while (tok) {
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for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) {
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struct perf_mem_event *e = &perf_mem_events[j];
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if (strstr(e->tag, tok))
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e->record = found = true;
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}
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tok = strtok_r(NULL, ",", &saveptr);
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}
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free(buf);
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if (found)
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return 0;
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pr_err("failed: event '%s' not found, use '-e list' to get list of available events\n", str);
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return -1;
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}
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int perf_mem_events__init(void)
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{
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const char *mnt = sysfs__mount();
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bool found = false;
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int j;
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if (!mnt)
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return -ENOENT;
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for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) {
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char path[PATH_MAX];
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struct perf_mem_event *e = &perf_mem_events[j];
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struct stat st;
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scnprintf(path, PATH_MAX, "%s/devices/cpu/events/%s",
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mnt, e->sysfs_name);
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if (!stat(path, &st))
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e->supported = found = true;
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}
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return found ? 0 : -ENOENT;
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}
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static const char * const tlb_access[] = {
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"N/A",
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"HIT",
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"MISS",
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"L1",
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"L2",
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"Walker",
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"Fault",
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};
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void perf_mem__tlb_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
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{
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size_t l = 0, i;
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u64 m = PERF_MEM_TLB_NA;
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u64 hit, miss;
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sz -= 1; /* -1 for null termination */
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out[0] = '\0';
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if (mem_info)
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m = mem_info->data_src.mem_dtlb;
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hit = m & PERF_MEM_TLB_HIT;
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miss = m & PERF_MEM_TLB_MISS;
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/* already taken care of */
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m &= ~(PERF_MEM_TLB_HIT|PERF_MEM_TLB_MISS);
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for (i = 0; m && i < ARRAY_SIZE(tlb_access); i++, m >>= 1) {
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if (!(m & 0x1))
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continue;
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if (l) {
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strcat(out, " or ");
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l += 4;
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}
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strncat(out, tlb_access[i], sz - l);
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l += strlen(tlb_access[i]);
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}
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if (*out == '\0')
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strcpy(out, "N/A");
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if (hit)
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strncat(out, " hit", sz - l);
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if (miss)
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strncat(out, " miss", sz - l);
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}
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