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Subject[PATCH 42/47] perf kvm stat report: Add option to analyze specific VM
Date
From: David Ahern <dsahern@gmail.com>

Add an option to analyze a specific VM within a data file. This allows
the collection of kvm events for all VMs and then analyze data for each
VM (or set of VMs) individually.

Signed-off-by: David Ahern <dsahern@gmail.com>
Reviewed-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Runzhen Wang <runzhen@linux.vnet.ibm.com>
Cc: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/1375753297-69645-6-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/builtin-kvm.c | 38 ++++++++++++++++++++++++++++++++++++--
1 file changed, 36 insertions(+), 2 deletions(-)

diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index b6595e9..2ceec81 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -9,7 +9,7 @@
#include "util/thread.h"
#include "util/header.h"
#include "util/session.h"
-
+#include "util/intlist.h"
#include "util/parse-options.h"
#include "util/trace-event.h"
#include "util/debug.h"
@@ -107,6 +107,9 @@ struct perf_kvm_stat {
u64 total_count;
u64 lost_events;

+ const char *pid_str;
+ struct intlist *pid_list;
+
struct rb_root result;

int timerfd;
@@ -777,16 +780,29 @@ static int process_lost_event(struct perf_tool *tool,
return 0;
}

+static bool skip_sample(struct perf_kvm_stat *kvm,
+ struct perf_sample *sample)
+{
+ if (kvm->pid_list && intlist__find(kvm->pid_list, sample->pid) == NULL)
+ return true;
+
+ return false;
+}
+
static int process_sample_event(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct perf_evsel *evsel,
struct machine *machine)
{
- struct thread *thread = machine__findnew_thread(machine, sample->tid);
+ struct thread *thread;
struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat,
tool);

+ if (skip_sample(kvm, sample))
+ return 0;
+
+ thread = machine__findnew_thread(machine, sample->tid);
if (thread == NULL) {
pr_debug("problem processing %d event, skipping it.\n",
event->header.type);
@@ -1209,11 +1225,27 @@ static int read_events(struct perf_kvm_stat *kvm)
return perf_session__process_events(kvm->session, &kvm->tool);
}

+static int parse_target_str(struct perf_kvm_stat *kvm)
+{
+ if (kvm->pid_str) {
+ kvm->pid_list = intlist__new(kvm->pid_str);
+ if (kvm->pid_list == NULL) {
+ pr_err("Error parsing process id string\n");
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm)
{
int ret = -EINVAL;
int vcpu = kvm->trace_vcpu;

+ if (parse_target_str(kvm) != 0)
+ goto exit;
+
if (!verify_vcpu(vcpu))
goto exit;

@@ -1300,6 +1332,8 @@ kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv)
OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
"key for sorting: sample(sort by samples number)"
" time (sort by avg time)"),
+ OPT_STRING('p', "pid", &kvm->pid_str, "pid",
+ "analyze events only for given process id(s)"),
OPT_END()
};

--
1.8.1.4


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