1218838d68
Add support for 'perf kvm stat' on arm64 platform.
Example:
# perf kvm stat report
Analyze events for all VMs, all VCPUs:
VM-EXIT Samples Samples% Time% Min Time Max Time Avg time
DABT_LOW 661867 98.91% 40.45% 2.19us 3364.65us 6.24us ( +- 0.34% )
IRQ 4598 0.69% 57.44% 2.89us 3397.59us 1276.27us ( +- 1.61% )
WFx 1475 0.22% 1.71% 2.22us 3388.63us 118.31us ( +- 8.69% )
IABT_LOW 1018 0.15% 0.38% 2.22us 2742.07us 38.29us ( +- 12.55% )
SYS64 180 0.03% 0.01% 2.07us 112.91us 6.57us ( +- 14.95% )
HVC64 17 0.00% 0.01% 2.19us 322.35us 42.95us ( +- 58.98% )
Total Samples:669155, Total events handled time:10216387.86us.
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Reviewed-by: Leo Yan <leo.yan@linaro.org>
Tested-by: Leo Yan <leo.yan@linaro.org>
Cc: John Garry <john.garry@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Suleiman Souhlal <suleiman@google.com>
Link: http://lore.kernel.org/lkml/20201027062421.463355-1-sergey.senozhatsky@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
86 lines
2.0 KiB
C
86 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <errno.h>
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#include <memory.h>
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#include "../../util/evsel.h"
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#include "../../util/kvm-stat.h"
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#include "arm64_exception_types.h"
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#include "debug.h"
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define_exit_reasons_table(arm64_exit_reasons, kvm_arm_exception_type);
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define_exit_reasons_table(arm64_trap_exit_reasons, kvm_arm_exception_class);
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const char *kvm_trap_exit_reason = "esr_ec";
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const char *vcpu_id_str = "id";
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const int decode_str_len = 20;
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const char *kvm_exit_reason = "ret";
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const char *kvm_entry_trace = "kvm:kvm_entry";
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const char *kvm_exit_trace = "kvm:kvm_exit";
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const char *kvm_events_tp[] = {
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"kvm:kvm_entry",
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"kvm:kvm_exit",
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NULL,
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};
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static void event_get_key(struct evsel *evsel,
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struct perf_sample *sample,
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struct event_key *key)
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{
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key->info = 0;
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key->key = evsel__intval(evsel, sample, kvm_exit_reason);
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key->exit_reasons = arm64_exit_reasons;
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/*
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* TRAP exceptions carry exception class info in esr_ec field
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* and, hence, we need to use a different exit_reasons table to
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* properly decode event's est_ec.
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*/
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if (key->key == ARM_EXCEPTION_TRAP) {
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key->key = evsel__intval(evsel, sample, kvm_trap_exit_reason);
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key->exit_reasons = arm64_trap_exit_reasons;
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}
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}
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static bool event_begin(struct evsel *evsel,
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struct perf_sample *sample __maybe_unused,
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struct event_key *key __maybe_unused)
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{
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return !strcmp(evsel->name, kvm_entry_trace);
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}
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static bool event_end(struct evsel *evsel,
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struct perf_sample *sample,
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struct event_key *key)
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{
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if (!strcmp(evsel->name, kvm_exit_trace)) {
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event_get_key(evsel, sample, key);
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return true;
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}
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return false;
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}
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static struct kvm_events_ops exit_events = {
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.is_begin_event = event_begin,
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.is_end_event = event_end,
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.decode_key = exit_event_decode_key,
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.name = "VM-EXIT"
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};
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struct kvm_reg_events_ops kvm_reg_events_ops[] = {
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{
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.name = "vmexit",
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.ops = &exit_events,
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},
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{ NULL },
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};
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const char * const kvm_skip_events[] = {
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NULL,
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};
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int cpu_isa_init(struct perf_kvm_stat *kvm, const char *cpuid __maybe_unused)
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{
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kvm->exit_reasons_isa = "arm64";
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return 0;
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}
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