Commit a34bb6a0 authored by Namhyung Kim's avatar Namhyung Kim Committed by Arnaldo Carvalho de Melo
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perf tools: Add 'trace' sort key 



The 'trace' sort key is to show tracepoint event output using either
print fmt or plugin.  For example sched_switch event (using plugin) will
show output like below:

  # perf record -e sched:sched_switch -a usleep 10
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.197 MB perf.data (69 samples) ]
  #

  $ perf report -s trace --stdio
  ...
  # Overhead  Trace output
  # ........  ...................................................
  #
       9.48%  swapper/0:0 [120] R ==> transmission-gt:17773 [120]
       9.48%  transmission-gt:17773 [120] S ==> swapper/0:0 [120]
       9.04%  swapper/2:0 [120] R ==> transmission-gt:17773 [120]
       8.92%  transmission-gt:17773 [120] S ==> swapper/2:0 [120]
       5.25%  swapper/0:0 [120] R ==> kworker/0:1H:109 [100]
       5.21%  kworker/0:1H:109 [100] S ==> swapper/0:0 [120]
       1.78%  swapper/3:0 [120] R ==> transmission-gt:17773 [120]
       1.78%  transmission-gt:17773 [120] S ==> swapper/3:0 [120]
       1.53%  Xephyr:6524 [120] S ==> swapper/0:0 [120]
       1.53%  swapper/0:0 [120] R ==> Xephyr:6524 [120]
       1.17%  swapper/2:0 [120] R ==> irq/33-iwlwifi:233 [49]
       1.13%  irq/33-iwlwifi:233 [49] S ==> swapper/2:0 [120]

Note that the 'trace' sort key works only for tracepoint events.  If
it's used to other type of events, just "N/A" will be printed.

Suggested-and-acked-by: default avatarJiri Olsa <jolsa@redhat.com>
Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
Tested-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1450804030-29193-8-git-send-email-namhyung@kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 60517d28

tools/perf/util/hist.h

+1 −0
Original line number Diff line number Diff line
@@ -52,6 +52,7 @@ enum hist_column { 
	HISTC_MEM_IADDR_SYMBOL,

	HISTC_TRANSACTION,

	HISTC_CYCLES,

	HISTC_TRACE,

	HISTC_NR_COLS, /* Last entry */

};

tools/perf/util/sort.c

+60 −16
Original line number Diff line number Diff line
@@ -445,6 +445,65 @@ struct sort_entry sort_socket = { 
	.se_width_idx	= HISTC_SOCKET,

};



/* --sort trace */



static char *get_trace_output(struct hist_entry *he)

{

	struct trace_seq seq;

	struct perf_evsel *evsel;

	struct pevent_record rec = {

		.data = he->raw_data,

		.size = he->raw_size,

	};



	evsel = hists_to_evsel(he->hists);



	trace_seq_init(&seq);

	pevent_event_info(&seq, evsel->tp_format, &rec);

	return seq.buffer;

}



static int64_t

sort__trace_cmp(struct hist_entry *left, struct hist_entry *right)

{

	struct perf_evsel *evsel;



	evsel = hists_to_evsel(left->hists);

	if (evsel->attr.type != PERF_TYPE_TRACEPOINT)

		return 0;



	if (left->trace_output == NULL)

		left->trace_output = get_trace_output(left);

	if (right->trace_output == NULL)

		right->trace_output = get_trace_output(right);



	hists__new_col_len(left->hists, HISTC_TRACE, strlen(left->trace_output));

	hists__new_col_len(right->hists, HISTC_TRACE, strlen(right->trace_output));



	return strcmp(right->trace_output, left->trace_output);

}



static int hist_entry__trace_snprintf(struct hist_entry *he, char *bf,

				    size_t size, unsigned int width)

{

	struct perf_evsel *evsel;



	evsel = hists_to_evsel(he->hists);

	if (evsel->attr.type != PERF_TYPE_TRACEPOINT)

		return scnprintf(bf, size, "%-*.*s", width, width, "N/A");



	if (he->trace_output == NULL)

		he->trace_output = get_trace_output(he);

	return repsep_snprintf(bf, size, "%-*.*s", width, width, he->trace_output);

}



struct sort_entry sort_trace = {

	.se_header      = "Trace output",

	.se_cmp	        = sort__trace_cmp,

	.se_snprintf    = hist_entry__trace_snprintf,

	.se_width_idx	= HISTC_TRACE,

};



/* sort keys for branch stacks */



static int64_t
@@ -1314,6 +1373,7 @@ static struct sort_dimension common_sort_dimensions[] = { 
	DIM(SORT_LOCAL_WEIGHT, "local_weight", sort_local_weight),

	DIM(SORT_GLOBAL_WEIGHT, "weight", sort_global_weight),

	DIM(SORT_TRANSACTION, "transaction", sort_transaction),

	DIM(SORT_TRACE, "trace", sort_trace),

};



#undef DIM
@@ -1560,22 +1620,6 @@ static int hde_width(struct hpp_dynamic_entry *hde) 
	return hde->hpp.len;

}



static char *get_trace_output(struct hist_entry *he)

{

	struct trace_seq seq;

	struct perf_evsel *evsel;

	struct pevent_record rec = {

		.data = he->raw_data,

		.size = he->raw_size,

	};



	evsel = hists_to_evsel(he->hists);



	trace_seq_init(&seq);

	pevent_event_info(&seq, evsel->tp_format, &rec);

	return seq.buffer;

}



static void update_dynamic_len(struct hpp_dynamic_entry *hde,

			       struct hist_entry *he)

{

tools/perf/util/sort.h

+1 −0
Original line number Diff line number Diff line
@@ -183,6 +183,7 @@ enum sort_type { 
	SORT_LOCAL_WEIGHT,

	SORT_GLOBAL_WEIGHT,

	SORT_TRANSACTION,

	SORT_TRACE,



	/* branch stack specific sort keys */

	__SORT_BRANCH_STACK,

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