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authorJin Yao <yao.jin@linux.intel.com>2018-11-30 16:54:54 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2018-12-17 20:55:32 +0300
commitace4f8faea54f62521e349f70b49797e48873e1f (patch)
treeb854c5697ad108e077387ec8fe17b339458ad245 /tools/perf/util/annotate.c
parent44e92f8389b2242efde77d5321ffa88decd47df6 (diff)
downloadlinux-ace4f8faea54f62521e349f70b49797e48873e1f.tar.xz
perf annotate: Compute average IPC and IPC coverage per symbol
Add support to 'perf report' annotate view or 'perf annotate --stdio2' to aggregate the IPC derived from timed LBRs per symbol. We compute the average IPC and the IPC coverage percentage. For example: $ perf annotate --stdio2 Percent IPC Cycle (Average IPC: 2.30, IPC Coverage: 54.8%) Disassembly of section .text: 000000000003aac0 <random@@GLIBC_2.2.5>: 8.32 3.28 sub $0x18,%rsp 3.28 mov $0x1,%esi 3.28 xor %eax,%eax 3.28 cmpl $0x0,argp_program_version_hook@@GLIBC_2.2.5+0x1e0 11.57 3.28 1 ↓ je 20 lock cmpxchg %esi,__abort_msg@@GLIBC_PRIVATE+0x8a0 ↓ jne 29 ↓ jmp 43 11.57 1.10 20: cmpxchg %esi,__abort_msg@@GLIBC_PRIVATE+0x8a0 0.00 1.10 1 ↓ je 43 29: lea __abort_msg@@GLIBC_PRIVATE+0x8a0,%rdi sub $0x80,%rsp → callq __lll_lock_wait_private add $0x80,%rsp 0.00 3.00 43: lea __ctype_b@GLIBC_2.2.5+0x38,%rdi 3.00 lea 0xc(%rsp),%rsi 8.49 3.00 1 → callq __random_r 7.91 1.94 cmpl $0x0,argp_program_version_hook@@GLIBC_2.2.5+0x1e0 0.00 1.94 1 ↓ je 68 lock decl __abort_msg@@GLIBC_PRIVATE+0x8a0 ↓ jne 70 ↓ jmp 8a 0.00 2.00 68: decl __abort_msg@@GLIBC_PRIVATE+0x8a0 21.56 2.00 1 ↓ je 8a 70: lea __abort_msg@@GLIBC_PRIVATE+0x8a0,%rdi sub $0x80,%rsp → callq __lll_unlock_wake_private add $0x80,%rsp 21.56 2.90 8a: movslq 0xc(%rsp),%rax 2.90 add $0x18,%rsp 9.03 2.90 1 ← retq It shows for this symbol the average IPC is 2.30 and the IPC coverage is 54.8%. 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/1543586097-27632-2-git-send-email-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/annotate.c')
-rw-r--r--tools/perf/util/annotate.c41
1 files changed, 38 insertions, 3 deletions
diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 6936daf89ddd..4b2b1b09b8f1 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -1000,6 +1000,7 @@ static unsigned annotation__count_insn(struct annotation *notes, u64 start, u64
static void annotation__count_and_fill(struct annotation *notes, u64 start, u64 end, struct cyc_hist *ch)
{
unsigned n_insn;
+ unsigned int cover_insn = 0;
u64 offset;
n_insn = annotation__count_insn(notes, start, end);
@@ -1013,21 +1014,34 @@ static void annotation__count_and_fill(struct annotation *notes, u64 start, u64
for (offset = start; offset <= end; offset++) {
struct annotation_line *al = notes->offsets[offset];
- if (al)
+ if (al && al->ipc == 0.0) {
al->ipc = ipc;
+ cover_insn++;
+ }
+ }
+
+ if (cover_insn) {
+ notes->hit_cycles += ch->cycles;
+ notes->hit_insn += n_insn * ch->num;
+ notes->cover_insn += cover_insn;
}
}
}
void annotation__compute_ipc(struct annotation *notes, size_t size)
{
- u64 offset;
+ s64 offset;
if (!notes->src || !notes->src->cycles_hist)
return;
+ notes->total_insn = annotation__count_insn(notes, 0, size - 1);
+ notes->hit_cycles = 0;
+ notes->hit_insn = 0;
+ notes->cover_insn = 0;
+
pthread_mutex_lock(&notes->lock);
- for (offset = 0; offset < size; ++offset) {
+ for (offset = size - 1; offset >= 0; --offset) {
struct cyc_hist *ch;
ch = &notes->src->cycles_hist[offset];
@@ -2563,6 +2577,22 @@ call_like:
disasm_line__scnprintf(dl, bf, size, !notes->options->use_offset);
}
+static void ipc_coverage_string(char *bf, int size, struct annotation *notes)
+{
+ double ipc = 0.0, coverage = 0.0;
+
+ 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);
+ }
+
+ scnprintf(bf, size, "(Average IPC: %.2f, IPC Coverage: %.1f%%)",
+ ipc, coverage);
+}
+
static void __annotation_line__write(struct annotation_line *al, struct annotation *notes,
bool first_line, bool current_entry, bool change_color, int width,
void *obj, unsigned int percent_type,
@@ -2658,6 +2688,11 @@ static void __annotation_line__write(struct annotation_line *al, struct annotati
ANNOTATION__MINMAX_CYCLES_WIDTH - 1,
"Cycle(min/max)");
}
+
+ if (show_title && !*al->line) {
+ ipc_coverage_string(bf, sizeof(bf), notes);
+ obj__printf(obj, "%*s", ANNOTATION__AVG_IPC_WIDTH, bf);
+ }
}
obj__printf(obj, " ");