Commit 2d08124b authored by Leo Yan's avatar Leo Yan Committed by Arnaldo Carvalho de Melo
Browse files

perf kvm: Introduce histograms data structures 



This is a preparation to support histograms in perf kvm tool.  As first
step, this patch defines histograms data structures and initialize them.

Committer notes:

Those are only used by functions enclosed in:

  #if efined(HAVE_KVM_STAT_SUPPORT) && defined(HAVE_LIBTRACEEVENT)

So do this for these new functions and struct as well.

Reviewed-by: default avatarJames Clark <james.clark@arm.com>
Signed-off-by: default avatarLeo Yan <leo.yan@linaro.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230315145112.186603-2-leo.yan@linaro.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 2d31e0bf

tools/perf/builtin-kvm.c

+18 −0
Original line number Diff line number Diff line
@@ -85,6 +85,20 @@ static struct kvm_event_key keys[] = { 
	DEF_SORT_NAME_KEY(time, mean),

	{ NULL, NULL }

};



struct kvm_hists {

	struct hists		hists;

	struct perf_hpp_list	list;

};



static struct kvm_hists kvm_hists;



static int kvm_hists__init(void)

{

	__hists__init(&kvm_hists.hists, &kvm_hists.list);

	perf_hpp_list__init(&kvm_hists.list);

	return 0;

}

#endif // defined(HAVE_KVM_STAT_SUPPORT) && defined(HAVE_LIBTRACEEVENT)



static const char *get_filename_for_perf_kvm(void)
@@ -959,6 +973,8 @@ static int kvm_events_live_report(struct perf_kvm_stat *kvm) 
	set_term_quiet_input(&save);

	init_kvm_event_record(kvm);



	kvm_hists__init();



	signal(SIGINT, sig_handler);

	signal(SIGTERM, sig_handler);
@@ -1154,6 +1170,8 @@ static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm) 
	init_kvm_event_record(kvm);

	setup_pager();



	kvm_hists__init();



	ret = read_events(kvm);

	if (ret)

		goto exit;

tools/perf/util/kvm-stat.h

+1 −0
Original line number Diff line number Diff line
@@ -5,6 +5,7 @@ 
#ifdef HAVE_KVM_STAT_SUPPORT



#include "tool.h"

#include "sort.h"

#include "stat.h"

#include "record.h"