linux-kernel - [PATCH] perf kvm stat: unify print_vcpu

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Message-Id: <1409242664-10883-1-git-send-email-yarygin@linux.vnet.ibm.com>
Date:	Thu, 28 Aug 2014 20:17:44 +0400
From:	Alexander Yarygin <yarygin@...ux.vnet.ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	Alexander Yarygin <yarygin@...ux.vnet.ibm.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Christian Borntraeger <borntraeger@...ibm.com>,
	David Ahern <dsahern@...il.com>,
	Ingo Molnar <mingo@...nel.org>, Jiri Olsa <jolsa@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: [PATCH] perf kvm stat: unify print_vcpu_info() for report/live

The print_vcpu_info() function prints title line "Analyze events ..."
with a description of the current target. For 'live' option, the
output includes "system-wide/specific pids, all vcpus/specific vcpus".
Example:
$ sudo perf kvm stat live -p 1
Analyze events for pid(s) 1, all VCPUs: [..]

But for 'report' option the output only contains "all vcpus/specific
vcpus":
$ sudo perf kvm stat report -p 1
Analyze events for all VCPUs: [..]

Adding '-a' option for 'stat report' and unifying the print_vcpu_info()
function, so it can print complete target info for 'stat report':

$ sudo perf kvm stat report -p 1
Analyze events for pid(s) 1, all VCPUs: [..]

Cc: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Christian Borntraeger <borntraeger@...ibm.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Signed-off-by: Alexander Yarygin <yarygin@...ux.vnet.ibm.com>
---
 tools/perf/builtin-kvm.c   |   37 ++++++++++++++++++++++++++-----------
 tools/perf/util/kvm-stat.h |    1 -
 2 files changed, 26 insertions(+), 12 deletions(-)

diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 43367eb..ab97920 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -543,14 +543,12 @@ static void print_vcpu_info(struct perf_kvm_stat *kvm)

 	pr_info("Analyze events for ");

-	if (kvm->live) {
-		if (kvm->opts.target.system_wide)
-			pr_info("all VMs, ");
-		else if (kvm->opts.target.pid)
-			pr_info("pid(s) %s, ", kvm->opts.target.pid);
-		else
-			pr_info("dazed and confused on what is monitored, ");
-	}
+	if (kvm->opts.target.system_wide)
+		pr_info("all VMs, ");
+	else if (kvm->opts.target.pid)
+		pr_info("pid(s) %s, ", kvm->opts.target.pid);
+	else
+		pr_info("dazed and confused on what is monitored, ");

 	if (vcpu == -1)
 		pr_info("all VCPUs:\n\n");
@@ -1088,8 +1086,8 @@ static int read_events(struct perf_kvm_stat *kvm)

 static int parse_target_str(struct perf_kvm_stat *kvm)
 {
-	if (kvm->pid_str) {
-		kvm->pid_list = intlist__new(kvm->pid_str);
+	if (kvm->opts.target.pid) {
+		kvm->pid_list = intlist__new(kvm->opts.target.pid);
 		if (kvm->pid_list == NULL) {
 			pr_err("Error parsing process id string\n");
 			return -EINVAL;
@@ -1182,16 +1180,21 @@ kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv)
 static int
 kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv)
 {
+	char errbuf[BUFSIZ];
+	int err;
+
 	const struct option kvm_events_report_options[] = {
 		OPT_STRING(0, "event", &kvm->report_event, "report event",
 			   "event for reporting: vmexit, "
 			   "mmio (x86 only), ioport (x86 only)"),
+		OPT_BOOLEAN('a', "all-cpus", &kvm->opts.target.system_wide,
+			    "system-wide collection from all CPUs"),
 		OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
 			    "vcpu id to report"),
 		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",
+		OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
 			   "analyze events only for given process id(s)"),
 		OPT_END()
 	};
@@ -1212,6 +1215,18 @@ kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv)
 					   kvm_events_report_options);
 	}

+	/*
+	 * target related setups
+	 */
+	err = target__validate(&kvm->opts.target);
+	if (err) {
+		target__strerror(&kvm->opts.target, err, errbuf, BUFSIZ);
+		ui__warning("%s", errbuf);
+	}
+
+	if (target__none(&kvm->opts.target))
+		kvm->opts.target.system_wide = true;
+
 	return kvm_events_report_vcpu(kvm);
 }

diff --git a/tools/perf/util/kvm-stat.h b/tools/perf/util/kvm-stat.h
index 0b5a8cd..cf1d7913 100644
--- a/tools/perf/util/kvm-stat.h
+++ b/tools/perf/util/kvm-stat.h
@@ -92,7 +92,6 @@ struct perf_kvm_stat {
 	u64 lost_events;
 	u64 duration;

-	const char *pid_str;
 	struct intlist *pid_list;

 	struct rb_root result;
--
1.7.9.5

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