linux-kernel - Re: [PATCH 2/3] perf hists browser: Allow thread filtering for comm sort key

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Date:	Wed, 9 Mar 2016 11:26:03 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Jiri Olsa <jolsa@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>
Subject: Re: [PATCH 2/3] perf hists browser: Allow thread filtering for comm
 sort key

Em Wed, Mar 09, 2016 at 11:20:52PM +0900, Namhyung Kim escreveu:
> The commit 2eafd410e669 ("perf hists browser: Only 'Zoom into thread'
> only when sort order has 'pid'") disabled thread filtering in hist
> browser for the default sort key.  However the he->thread is still valid
> even if 'pid' sort key is not given.  Only thing it should not use is
> the pid (or tid) of the thread.  So allow to filter by thread when
> 'comm' sort key is given and show pid only if 'pid' sort key is given.
> 
> Signed-off-by: Namhyung Kim <namhyung@...nel.org>
> ---
>  tools/perf/ui/browsers/hists.c | 39 +++++++++++++++++++++++++++++----------
>  1 file changed, 29 insertions(+), 10 deletions(-)
> 
> diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
> index aed9c8f011f7..69b0d23ffaaa 100644
> --- a/tools/perf/ui/browsers/hists.c
> +++ b/tools/perf/ui/browsers/hists.c
> @@ -2136,11 +2136,17 @@ static int hists__browser_title(struct hists *hists,
>  	if (hists->uid_filter_str)
>  		printed += snprintf(bf + printed, size - printed,
>  				    ", UID: %s", hists->uid_filter_str);
> -	if (thread)
> -		printed += scnprintf(bf + printed, size - printed,
> +	if (thread) {
> +		if (sort__has_thread)

Please use { } for multi-line if blocks.

> +			printed += scnprintf(bf + printed, size - printed,
>  				    ", Thread: %s(%d)",
>  				     (thread->comm_set ? thread__comm_str(thread) : ""),
>  				    thread->tid);
> +		else
> +			printed += scnprintf(bf + printed, size - printed,
> +				    ", Thread: %s",
> +				     (thread->comm_set ? thread__comm_str(thread) : ""));
> +	}
>  	if (dso)
>  		printed += scnprintf(bf + printed, size - printed,
>  				    ", DSO: %s", dso->short_name);
> @@ -2321,9 +2327,14 @@ do_zoom_thread(struct hist_browser *browser, struct popup_action *act)
>  		thread__zput(browser->hists->thread_filter);
>  		ui_helpline__pop();
>  	} else {
> -		ui_helpline__fpush("To zoom out press ESC or ENTER + \"Zoom out of %s(%d) thread\"",
> -				   thread->comm_set ? thread__comm_str(thread) : "",
> -				   thread->tid);
> +		if (sort__has_thread)
> +			ui_helpline__fpush("To zoom out press ESC or ENTER + \"Zoom out of %s(%d) thread\"",
> +					   thread->comm_set ? thread__comm_str(thread) : "",
> +					   thread->tid);
> +		else
> +			ui_helpline__fpush("To zoom out press ESC or ENTER + \"Zoom out of %s thread\"",
> +					   thread->comm_set ? thread__comm_str(thread) : "");
> +
>  		browser->hists->thread_filter = thread__get(thread);
>  		perf_hpp__set_elide(HISTC_THREAD, false);
>  		pstack__push(browser->pstack, &browser->hists->thread_filter);
> @@ -2338,13 +2349,21 @@ static int
>  add_thread_opt(struct hist_browser *browser, struct popup_action *act,
>  	       char **optstr, struct thread *thread)
>  {
> -	if (!sort__has_thread || thread == NULL)
> +	int ret;
> +
> +	if ((!sort__has_thread && !sort__has_comm) || thread == NULL)
>  		return 0;
>  
> -	if (asprintf(optstr, "Zoom %s %s(%d) thread",
> -		     browser->hists->thread_filter ? "out of" : "into",
> -		     thread->comm_set ? thread__comm_str(thread) : "",
> -		     thread->tid) < 0)
> +	if (sort__has_thread)

Ditto

> +		ret = asprintf(optstr, "Zoom %s %s(%d) thread",
> +			       browser->hists->thread_filter ? "out of" : "into",
> +			       thread->comm_set ? thread__comm_str(thread) : "",
> +			       thread->tid);
> +	else

ditto

> +		ret = asprintf(optstr, "Zoom %s %s thread",
> +			       browser->hists->thread_filter ? "out of" : "into",
> +			       thread->comm_set ? thread__comm_str(thread) : "");
> +	if (ret < 0)
>  		return 0;
>  
>  	act->thread = thread;
> -- 
> 2.7.2