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perf report: Display average IPC and IPC coverage per symbol

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Support displaying the average IPC and IPC coverage per symbol in 'perf
report' --tui and --stdio modes.

For example,

 $ perf record -b ...
 $ perf report -s symbol

 Overhead  Symbol                           IPC   [IPC Coverage]
   39.60%  [.] __random                     2.30  [ 54.8%]
   18.02%  [.] main                         0.43  [ 54.3%]
   14.21%  [.] compute_flag                 2.29  [100.0%]
   14.16%  [.] rand                         0.36  [100.0%]
    7.06%  [.] __random_r                   2.57  [ 70.5%]
    6.85%  [.] rand@plt                     0.00  [  0.0%]

Jiri Olsa <jolsa@redhat.com> provided the patch to support the --stdio
mode. I merged Jiri's code in this patch.

  $ perf report -s symbol --stdio

    # Overhead  Symbol                       IPC   [IPC Coverage]
    # ........  ...........................  ....................
    #
      39.60%  [.] __random                   2.30  [ 54.8%]
      18.02%  [.] main                       0.43  [ 54.3%]
      14.21%  [.] compute_flag               2.29  [100.0%]
      14.16%  [.] rand                       0.36  [100.0%]
       7.06%  [.] __random_r                 2.57  [ 70.5%]
       6.85%  [.] rand@plt                   0.00  [  0.0%]
       0.02%  [k] run_timer_softirq          1.60  [ 57.2%]

The columns "IPC" and "[IPC Coverage]" are automatically enabled when
the sort-key "symbol" is specified. If the perf.data file doesn't
contain timed LBR information, columns are filled with "-".

For example,

  # Overhead  Symbol                       IPC   [IPC Coverage]
  # ........  ...........................  ....................
  #
      46.57%  [.] main                     -      -
      17.60%  [.] rand                     -      -
      15.84%  [.] __random_r               -      -
      11.90%  [.] __random                 -      -
       6.50%  [.] compute_flag             -      -
       1.59%  [.] rand@plt                 -      -
       0.00%  [.] _dl_relocate_object      -      -
       0.00%  [k] tlb_flush_mmu            -      -
       0.00%  [k] perf_event_mmap          -      -
       0.00%  [k] native_sched_clock       -      -
       0.00%  [k] intel_pmu_handle_irq_v4  -      -
       0.00%  [k] native_write_msr         -      -

 v3:
 ---
 Removed the sortkey 'ipc' from command-line. The columns "IPC"
 and "[IPC Coverage]" are automatically enabled when "symbol"
 is specified.

 v2:
 ---
 Merge in Jiri's patch to support stdio mode

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1543586097-27632-4-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jin Yao 2018-11-30 21:54:56 +08:00 • committed by Arnaldo Carvalho de Melo
parent 246fda09c1
commit ec6ae74fe8
4 changed files with 87 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

26
tools/perf/builtin-report.c
View file

@ -85,6 +85,7 @@ struct report {
int socket_filter;
DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
struct branch_type_stat brtype_stat;
bool symbol_ipc;
};
static int report__config(const char *var, const char *value, void *cb)
@ -129,7 +130,7 @@ static int hist_iter__report_callback(struct hist_entry_iter *iter,
struct mem_info *mi;
struct branch_info *bi;
if (!ui__has_annotation())
if (!ui__has_annotation() && !rep->symbol_ipc)
return 0;
hist__account_cycles(sample->branch_stack, al, sample,
@ -174,7 +175,7 @@ static int hist_iter__branch_callback(struct hist_entry_iter *iter,
struct perf_evsel *evsel = iter->evsel;
int err;
if (!ui__has_annotation())
if (!ui__has_annotation() && !rep->symbol_ipc)
return 0;
hist__account_cycles(sample->branch_stack, al, sample,
@ -1133,6 +1134,7 @@ int cmd_report(int argc, const char **argv)
.mode = PERF_DATA_MODE_READ,
};
int ret = hists__init();
char sort_tmp[128];
if (ret < 0)
return ret;
@ -1284,6 +1286,24 @@ repeat:
else
use_browser = 0;
if (sort_order && strstr(sort_order, "ipc")) {
parse_options_usage(report_usage, options, "s", 1);
goto error;
}
if (sort_order && strstr(sort_order, "symbol")) {
if (sort__mode == SORT_MODE__BRANCH) {
snprintf(sort_tmp, sizeof(sort_tmp), "%s,%s",
sort_order, "ipc_lbr");
report.symbol_ipc = true;
} else {
snprintf(sort_tmp, sizeof(sort_tmp), "%s,%s",
sort_order, "ipc_null");
}
sort_order = sort_tmp;
}
if (setup_sorting(session->evlist) < 0) {
if (sort_order)
parse_options_usage(report_usage, options, "s", 1);
@ -1311,7 +1331,7 @@ repeat:
* so don't allocate extra space that won't be used in the stdio
* implementation.
*/
if (ui__has_annotation()) {
if (ui__has_annotation() || report.symbol_ipc) {
ret = symbol__annotation_init();
if (ret < 0)
goto error;

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

@ -62,6 +62,7 @@ enum hist_column {
HISTC_TRACE,
HISTC_SYM_SIZE,
HISTC_DSO_SIZE,
HISTC_SYMBOL_IPC,
HISTC_NR_COLS, /* Last entry */
};

61
tools/perf/util/sort.c
View file

@ -13,6 +13,7 @@
#include "strlist.h"
#include <traceevent/event-parse.h>
#include "mem-events.h"
#include "annotate.h"
#include <linux/kernel.h>
regex_t parent_regex;
@ -422,6 +423,64 @@ struct sort_entry sort_srcline_to = {
.se_width_idx = HISTC_SRCLINE_TO,
};
static int hist_entry__sym_ipc_snprintf(struct hist_entry *he, char *bf,
size_t size, unsigned int width)
{
struct symbol *sym = he->ms.sym;
struct map *map = he->ms.map;
struct perf_evsel *evsel = hists_to_evsel(he->hists);
struct annotation *notes;
double ipc = 0.0, coverage = 0.0;
char tmp[64];
if (!sym)
return repsep_snprintf(bf, size, "%-*s", width, "-");
if (!sym->annotate2 && symbol__annotate2(sym, map, evsel,
&annotation__default_options, NULL) < 0) {
return 0;
}
notes = symbol__annotation(sym);
if (notes->hit_cycles)
ipc = notes->hit_insn / ((double)notes->hit_cycles);
if (notes->total_insn) {
coverage = notes->cover_insn * 100.0 /
((double)notes->total_insn);
}
snprintf(tmp, sizeof(tmp), "%-5.2f [%5.1f%%]", ipc, coverage);
return repsep_snprintf(bf, size, "%-*s", width, tmp);
}
struct sort_entry sort_sym_ipc = {
.se_header = "IPC [IPC Coverage]",
.se_cmp = sort__sym_cmp,
.se_snprintf = hist_entry__sym_ipc_snprintf,
.se_width_idx = HISTC_SYMBOL_IPC,
};
static int hist_entry__sym_ipc_null_snprintf(struct hist_entry *he
__maybe_unused,
char *bf, size_t size,
unsigned int width)
{
char tmp[64];
snprintf(tmp, sizeof(tmp), "%-5s %2s", "-", "-");
return repsep_snprintf(bf, size, "%-*s", width, tmp);
}
struct sort_entry sort_sym_ipc_null = {
.se_header = "IPC [IPC Coverage]",
.se_cmp = sort__sym_cmp,
.se_snprintf = hist_entry__sym_ipc_null_snprintf,
.se_width_idx = HISTC_SYMBOL_IPC,
};
/* --sort srcfile */
static char no_srcfile[1];
@ -1574,6 +1633,7 @@ static struct sort_dimension common_sort_dimensions[] = {
DIM(SORT_SYM_SIZE, "symbol_size", sort_sym_size),
DIM(SORT_DSO_SIZE, "dso_size", sort_dso_size),
DIM(SORT_CGROUP_ID, "cgroup_id", sort_cgroup_id),
DIM(SORT_SYM_IPC_NULL, "ipc_null", sort_sym_ipc_null),
};
#undef DIM
@ -1591,6 +1651,7 @@ static struct sort_dimension bstack_sort_dimensions[] = {
DIM(SORT_CYCLES, "cycles", sort_cycles),
DIM(SORT_SRCLINE_FROM, "srcline_from", sort_srcline_from),
DIM(SORT_SRCLINE_TO, "srcline_to", sort_srcline_to),
DIM(SORT_SYM_IPC, "ipc_lbr", sort_sym_ipc),
};
#undef DIM

2
tools/perf/util/sort.h
View file

@ -229,6 +229,7 @@ enum sort_type {
SORT_SYM_SIZE,
SORT_DSO_SIZE,
SORT_CGROUP_ID,
SORT_SYM_IPC_NULL,
/* branch stack specific sort keys */
__SORT_BRANCH_STACK,
@ -242,6 +243,7 @@ enum sort_type {
SORT_CYCLES,
SORT_SRCLINE_FROM,
SORT_SRCLINE_TO,
SORT_SYM_IPC,
/* memory mode specific sort keys */
__SORT_MEMORY_MODE,