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perf tools: Add 'trace' sort key

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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: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo 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: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim 2015-12-23 02:07:04 +09:00 committed by Arnaldo Carvalho de Melo
parent 60517d28fb
commit a34bb6a08d
3 changed files with 62 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
tools/perf/util/hist.h
View File

@ -52,6 +52,7 @@ enum hist_column {
HISTC_MEM_IADDR_SYMBOL,
HISTC_TRANSACTION,
HISTC_CYCLES,
HISTC_TRACE,
HISTC_NR_COLS, /* Last entry */
};

76
tools/perf/util/sort.c
View File

@ -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)
{

1
tools/perf/util/sort.h
View File

@ -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,