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3b7270c766
For `perf kvm stat` on the RISC-V, in order to avoid the occurrence of `UNKNOWN` event names, interrupts should be reported in addition to exceptions. testing without patch: Event name Samples Sample% Time(ns) --------------------------- -------- -------- ------------ STORE_GUEST_PAGE_FAULT 1496461 53.00% 889612544 UNKNOWN 887514 31.00% 272857968 LOAD_GUEST_PAGE_FAULT 305164 10.00% 189186331 VIRTUAL_INST_FAULT 70625 2.00% 134114260 SUPERVISOR_SYSCALL 32014 1.00% 58577110 INST_GUEST_PAGE_FAULT 1 0.00% 2545 testing with patch: Event name Samples Sample% Time(ns) --------------------------- -------- -------- ------------ IRQ_S_TIMER 211271 58.00% 738298680600 EXC_STORE_GUEST_PAGE_FAULT 111279 30.00% 130725914800 EXC_LOAD_GUEST_PAGE_FAULT 22039 6.00% 25441480600 EXC_VIRTUAL_INST_FAULT 8913 2.00% 21015381600 IRQ_VS_EXT 4748 1.00% 10155464300 IRQ_S_EXT 2802 0.00% 13288775800 IRQ_S_SOFT 1998 0.00% 4254129300 Signed-off-by: Quan Zhou <zhouquan@iscas.ac.cn> Reviewed-by: Andrew Jones <ajones@ventanamicro.com> Link: https://lore.kernel.org/r/9693132df4d0f857b8be3a75750c36b40213fcc0.1726211632.git.zhouquan@iscas.ac.cn Signed-off-by: Anup Patel <anup@brainfault.org>
79 lines
1.7 KiB
C
79 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Arch specific functions for perf kvm stat.
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*
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* Copyright 2024 Beijing ESWIN Computing Technology Co., Ltd.
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*
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*/
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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 "riscv_trap_types.h"
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#include "debug.h"
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define_exit_reasons_table(riscv_exit_reasons, kvm_riscv_trap_class);
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const char *vcpu_id_str = "id";
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const char *kvm_exit_reason = "scause";
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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) & ~CAUSE_IRQ_FLAG;
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key->exit_reasons = riscv_exit_reasons;
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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 evsel__name_is(evsel, 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 (evsel__name_is(evsel, 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, 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 = "riscv64";
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return 0;
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}
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