linux-kernel - Re: [RFC/PATCH 2/3] perf script: Print comm, fork and exit events also

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Date:	Sun, 17 Nov 2013 21:44:46 -0700
From:	David Ahern <dsahern@...il.com>
To:	Namhyung Kim <namhyung@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
CC:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...nel.org>,
	Namhyung Kim <namhyung.kim@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Jiri Olsa <jolsa@...hat.com>
Subject: Re: [RFC/PATCH 2/3] perf script: Print comm, fork and exit events
 also

On 11/17/13, 8:00 PM, Namhyung Kim wrote:
> @@ -578,6 +579,106 @@ static int process_attr(struct perf_tool *tool, union perf_event *event,
>   	return perf_evsel__check_attr(evsel, scr->session);
>   }
>
> +static int process_comm_event(struct perf_tool *tool,
> +			      union perf_event *event,
> +			      struct perf_sample *sample,
> +			      struct machine *machine)
> +{
> +	struct thread *thread;
> +	struct perf_script *script = container_of(tool, struct perf_script, tool);
> +	struct perf_session *session = script->session;
> +	struct perf_evsel *evsel = perf_evlist__first(session->evlist);
> +	char *oldname;
> +
> +	thread = machine__findnew_thread(machine, event->comm.pid, event->comm.tid);
> +	if (thread == NULL) {
> +		pr_debug("problem processing COMM event, skipping it.\n");
> +		return -1;
> +	}
> +
> +	oldname = strdup(thread__comm_str(thread));
> +	if (oldname == NULL) {
> +		pr_debug("problem processing COMM event, skipping it.\n");
> +		return -1;
> +	}
> +
> +	if (perf_event__process_comm(tool, event, sample, machine) < 0)
> +		return -1;
> +
> +	if (!evsel->attr.sample_id_all) {
> +		sample->cpu = 0;
> +		sample->time = 0;
> +		sample->tid = event->comm.tid;
> +		sample->pid = event->comm.pid;
> +	}
> +	print_sample_start(sample, thread, evsel);
> +	printf("comm: %s --> %s\n", oldname, event->comm.comm);

free(oldname)

David
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