perf kvm: Add skip_event() for --duration option
Current code skips output of the x86 specific HLT event in order to avoid flooding the output with enabled --duration option. The events to be skipped should be architecture dependent, though. Let's add an architecture specific array of events to be skipped and introduce a skip_event() function checking against that array. Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: David Ahern <dsahern@gmail.com> Signed-off-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Cornelia Huck <cornelia.huck@de.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1404397747-20939-4-git-send-email-yarygin@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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3 changed files with 18 additions and 1 deletions
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@ -136,6 +136,11 @@ struct kvm_reg_events_ops kvm_reg_events_ops[] = {
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{ NULL, NULL },
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};
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const char * const kvm_skip_events[] = {
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"HLT",
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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)
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{
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if (strstr(cpuid, "Intel")) {
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@ -261,6 +261,17 @@ static bool update_kvm_event(struct kvm_event *event, int vcpu_id,
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return true;
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}
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static bool skip_event(const char *event)
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{
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const char * const *skip_events;
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for (skip_events = kvm_skip_events; *skip_events; skip_events++)
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if (!strcmp(event, *skip_events))
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return true;
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return false;
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}
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static bool handle_end_event(struct perf_kvm_stat *kvm,
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struct vcpu_event_record *vcpu_record,
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struct event_key *key,
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@ -312,7 +323,7 @@ static bool handle_end_event(struct perf_kvm_stat *kvm,
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char decode[DECODE_STR_LEN];
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kvm->events_ops->decode_key(kvm, &event->key, decode);
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if (strcmp(decode, "HLT")) {
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if (!skip_event(decode)) {
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pr_info("%" PRIu64 " VM %d, vcpu %d: %s event took %" PRIu64 "usec\n",
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sample->time, sample->pid, vcpu_record->vcpu_id,
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decode, time_diff/1000);
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@ -126,5 +126,6 @@ int cpu_isa_init(struct perf_kvm_stat *kvm, const char *cpuid);
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extern const char * const kvm_events_tp[];
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extern struct kvm_reg_events_ops kvm_reg_events_ops[];
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extern const char * const kvm_skip_events[];
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#endif /* __PERF_KVM_STAT_H */
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