linux-kernel - Re: [PATCH 2/5] perf,tools: Support new sort type --socket

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Date:	Fri, 4 Sep 2015 19:41:39 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	kan.liang@...el.com
Cc:	jolsa@...nel.org, namhyung@...nel.org, adrian.hunter@...el.com,
	eranian@...gle.com, ak@...ux.intel.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/5] perf,tools: Support new sort type --socket

Em Fri, Sep 04, 2015 at 10:45:43AM -0400, kan.liang@...el.com escreveu:
> From: Kan Liang <kan.liang@...el.com>
> 
> This patch enable perf report to sort by processor socket
> 
> $ perf report --stdio --sort socket,comm,dso,symbol
>  # To display the perf.data header info, please use
>  --header/--header-only options.
>  #
>  #
>  # Total Lost Samples: 0
>  #
>  # Samples: 686  of event 'cycles'
>  # Event count (approx.): 349215462
>  #
>  # Overhead  SOCKET  Command    Shared Object     Symbol
>  # ........  ......  .........  ................
>  .................................

So this works in 'perf top' only for the first screen rendering, when it
refreshes we lose the "SOCKET" header (why all caps?) and the colum
stops being %03d and instead becomes %d, I am checking now.

- Arnaldo

>  #
>     97.05%     000  test       test              [.] plusB_c
>      0.98%     000  test       test              [.] plusA_c
>      0.93%     001  perf       [kernel.vmlinux]  [k]
> smp_call_function_single
>      0.19%     001  perf       [kernel.vmlinux]  [k] page_fault
>      0.19%     001  swapper    [kernel.vmlinux]  [k] pm_qos_request
>      0.16%     000  test       [kernel.vmlinux]  [k] add_mm_counter_fast
> 
> Signed-off-by: Kan Liang <kan.liang@...el.com>
> ---
>  tools/perf/Documentation/perf-report.txt |  3 ++-
>  tools/perf/util/hist.h                   |  1 +
>  tools/perf/util/sort.c                   | 22 ++++++++++++++++++++++
>  tools/perf/util/sort.h                   |  1 +
>  4 files changed, 26 insertions(+), 1 deletion(-)
> 
> diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
> index 9c7981b..92361a7 100644
> --- a/tools/perf/Documentation/perf-report.txt
> +++ b/tools/perf/Documentation/perf-report.txt
> @@ -68,7 +68,7 @@ OPTIONS
>  --sort=::
>  	Sort histogram entries by given key(s) - multiple keys can be specified
>  	in CSV format.  Following sort keys are available:
> -	pid, comm, dso, symbol, parent, cpu, srcline, weight, local_weight.
> +	pid, comm, dso, symbol, parent, cpu, socket, srcline, weight, local_weight.
>  
>  	Each key has following meaning:
>  
> @@ -79,6 +79,7 @@ OPTIONS
>  	- parent: name of function matched to the parent regex filter. Unmatched
>  	entries are displayed as "[other]".
>  	- cpu: cpu number the task ran at the time of sample
> +	- socket: processor socket number the task ran at the time of sample
>  	- srcline: filename and line number executed at the time of sample.  The
>  	DWARF debugging info must be provided.
>  	- srcfile: file name of the source file of the same. Requires dwarf
> diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
> index de6d58e..5d04d28 100644
> --- a/tools/perf/util/hist.h
> +++ b/tools/perf/util/hist.h
> @@ -29,6 +29,7 @@ enum hist_column {
>  	HISTC_COMM,
>  	HISTC_PARENT,
>  	HISTC_CPU,
> +	HISTC_SOCKET,
>  	HISTC_SRCLINE,
>  	HISTC_SRCFILE,
>  	HISTC_MISPREDICT,
> diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
> index a97bcee..c4a32b9 100644
> --- a/tools/perf/util/sort.c
> +++ b/tools/perf/util/sort.c
> @@ -421,6 +421,27 @@ struct sort_entry sort_cpu = {
>  	.se_width_idx	= HISTC_CPU,
>  };
>  
> +/* --sort socket */
> +
> +static int64_t
> +sort__socket_cmp(struct hist_entry *left, struct hist_entry *right)
> +{
> +	return right->socket - left->socket;
> +}
> +
> +static int hist_entry__socket_snprintf(struct hist_entry *he, char *bf,
> +				    size_t size, unsigned int width)
> +{
> +	return repsep_snprintf(bf, size, "%*.*d", width, width-3, he->socket);
> +}
> +
> +struct sort_entry sort_socket = {
> +	.se_header      = "SOCKET",
> +	.se_cmp	        = sort__socket_cmp,
> +	.se_snprintf    = hist_entry__socket_snprintf,
> +	.se_width_idx	= HISTC_SOCKET,
> +};
> +
>  /* sort keys for branch stacks */
>  
>  static int64_t
> @@ -1248,6 +1269,7 @@ static struct sort_dimension common_sort_dimensions[] = {
>  	DIM(SORT_SYM, "symbol", sort_sym),
>  	DIM(SORT_PARENT, "parent", sort_parent),
>  	DIM(SORT_CPU, "cpu", sort_cpu),
> +	DIM(SORT_SOCKET, "socket", sort_socket),
>  	DIM(SORT_SRCLINE, "srcline", sort_srcline),
>  	DIM(SORT_SRCFILE, "srcfile", sort_srcfile),
>  	DIM(SORT_LOCAL_WEIGHT, "local_weight", sort_local_weight),
> diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
> index 7cf1cf7..654ac8a 100644
> --- a/tools/perf/util/sort.h
> +++ b/tools/perf/util/sort.h
> @@ -173,6 +173,7 @@ enum sort_type {
>  	SORT_SYM,
>  	SORT_PARENT,
>  	SORT_CPU,
> +	SORT_SOCKET,
>  	SORT_SRCLINE,
>  	SORT_SRCFILE,
>  	SORT_LOCAL_WEIGHT,
> -- 
> 1.8.3.1
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