Messages in this thread Patch in this message | | | From | Arnaldo Carvalho de Melo <> | Subject | [PATCH 14/26] perf diff: Print diff result more precisely | Date | Mon, 26 Jan 2015 14:47:17 -0300 |
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From: Namhyung Kim <namhyung@kernel.org>
Current perf diff result is somewhat confusing since it sometimes hide small result and sometimes there's no result. So do not hide small result (less than 0.01%) and print "N/A" if baseline is not recorded (for ratio and wdiff only). Blank means the baseline is available but its pairs are not.
Before:
# Baseline Delta Shared Object Symbol # ........ ....... ................. ......................... # ... 0.01% -0.01% [kernel.kallsyms] [k] native_write_msr_safe 0.01% [kernel.kallsyms] [k] scheduler_tick 0.01% [kernel.kallsyms] [k] native_read_msr_safe 0.00% [kernel.kallsyms] [k] __rcu_read_unlock [kernel.kallsyms] [k] _raw_spin_lock +0.01% [kernel.kallsyms] [k] apic_timer_interrupt [kernel.kallsyms] [k] read_tsc
After:
# Baseline Delta Shared Object Symbol # ........ ....... ................. ......................... # ... 0.01% -0.01% [kernel.kallsyms] [k] native_write_msr_safe 0.01% [kernel.kallsyms] [k] scheduler_tick 0.01% [kernel.kallsyms] [k] native_read_msr_safe 0.00% [kernel.kallsyms] [k] __rcu_read_unlock +0.01% [kernel.kallsyms] [k] _raw_spin_lock +0.01% [kernel.kallsyms] [k] apic_timer_interrupt +0.01% [kernel.kallsyms] [k] read_tsc
Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1419656793-32756-3-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> --- tools/perf/builtin-diff.c | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-)
diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c index 72c718e6549c..3f86737da2c4 100644 --- a/tools/perf/builtin-diff.c +++ b/tools/perf/builtin-diff.c @@ -788,7 +788,7 @@ static int __hpp__color_compare(struct perf_hpp_fmt *fmt, char pfmt[20] = " "; if (!pair) - goto dummy_print; + goto no_print; switch (comparison_method) { case COMPUTE_DELTA: @@ -797,8 +797,6 @@ static int __hpp__color_compare(struct perf_hpp_fmt *fmt, else diff = compute_delta(he, pair); - if (fabs(diff) < 0.01) - goto dummy_print; scnprintf(pfmt, 20, "%%%+d.2f%%%%", dfmt->header_width - 1); return percent_color_snprintf(hpp->buf, hpp->size, pfmt, diff); @@ -830,6 +828,9 @@ static int __hpp__color_compare(struct perf_hpp_fmt *fmt, } dummy_print: return scnprintf(hpp->buf, hpp->size, "%*s", + dfmt->header_width, "N/A"); +no_print: + return scnprintf(hpp->buf, hpp->size, "%*s", dfmt->header_width, pfmt); } @@ -879,14 +880,15 @@ hpp__entry_pair(struct hist_entry *he, struct hist_entry *pair, else diff = compute_delta(he, pair); - if (fabs(diff) >= 0.01) - scnprintf(buf, size, "%+4.2F%%", diff); + scnprintf(buf, size, "%+4.2F%%", diff); break; case PERF_HPP_DIFF__RATIO: /* No point for ratio number if we are dummy.. */ - if (he->dummy) + if (he->dummy) { + scnprintf(buf, size, "N/A"); break; + } if (pair->diff.computed) ratio = pair->diff.period_ratio; @@ -899,8 +901,10 @@ hpp__entry_pair(struct hist_entry *he, struct hist_entry *pair, case PERF_HPP_DIFF__WEIGHTED_DIFF: /* No point for wdiff number if we are dummy.. */ - if (he->dummy) + if (he->dummy) { + scnprintf(buf, size, "N/A"); break; + } if (pair->diff.computed) wdiff = pair->diff.wdiff; -- 1.9.3
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