From 40d81772dac45643cecc7add0e95356072265754 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Fri, 9 Aug 2019 16:44:34 -0300 Subject: [PATCH] perf top: Collapse and resort all evsels in a group And link them, i.e. find the hist entries in the non-leader events and link them to the ones in the leader. This should be the same thing already done for the 'perf report' case, but now we do it periodically. With this in place we get percentages in from the second overhead column on, not just on the first (the leader). Try it using: perf top --stdio -e '{cycles,instructions}' You should see something like: PerfTop: 20776 irqs/sec kernel:68.7% exact: 0.0% lost: 0/0 drop: 0/0 [cycles], (all, 8 CPUs) --------------------------------------------------------------------------------------------------- 4.44% 0.44% [kernel] [k] do_syscall_64 2.27% 0.17% [kernel] [k] entry_SYSCALL_64 1.73% 0.27% [kernel] [k] syscall_return_via_sysret 1.60% 0.91% [kernel] [k] _raw_spin_lock_irqsave 1.45% 3.53% libglib-2.0.so.0.6000.4 [.] g_string_insert_unichar 1.39% 0.21% [kernel] [k] copy_user_enhanced_fast_string 1.26% 1.15% [kernel] [k] psi_task_change 1.16% 0.14% libpixman-1.so.0.38.0 [.] 0x000000000006f403 1.00% 0.32% [kernel] [k] __sched_text_start 0.97% 2.11% [kernel] [k] n_tty_write 0.96% 0.04% [kernel] [k] queued_spin_lock_slowpath 0.93% 0.88% [kernel] [k] menu_select 0.87% 0.14% [kernel] [k] try_to_wake_up 0.77% 0.10% libpixman-1.so.0.38.0 [.] 0x000000000006f40b 0.73% 0.09% libpixman-1.so.0.38.0 [.] 0x000000000006f413 0.69% 0.48% libc-2.29.so [.] __memmove_avx_unaligned_erms 0.68% 0.29% [kernel] [k] _raw_spin_lock_irq 0.61% 0.04% libpixman-1.so.0.38.0 [.] 0x000000000006f423 0.60% 0.37% [kernel] [k] native_sched_clock 0.57% 0.23% [kernel] [k] do_idle 0.57% 0.23% [kernel] [k] __fget 0.56% 0.30% [kernel] [k] __switch_to_asm 0.56% 0.00% libc-2.29.so [.] __memset_avx2_erms 0.52% 0.32% [kernel] [k] _raw_spin_lock 0.49% 0.24% [kernel] [k] n_tty_poll 0.49% 0.54% libglib-2.0.so.0.6000.4 [.] g_mutex_lock 0.48% 0.62% [kernel] [k] _raw_spin_unlock_irqrestore 0.47% 0.27% [kernel] [k] __switch_to 0.47% 0.25% [kernel] [k] pick_next_task_fair 0.45% 0.17% [kernel] [k] filldir64 0.40% 0.16% [kernel] [k] update_rq_clock 0.39% 0.19% [kernel] [k] enqueue_task_fair # Cc: Adrian Hunter Cc: Jiri Olsa Cc: Namhyung Kim Link: https://lkml.kernel.org/n/tip-uw8cjeifxvjpkjp6x2iil0ar@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-top.c | 30 ++++++++++++++++++++++++++---- 1 file changed, 26 insertions(+), 4 deletions(-) diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index 94e3485..78e7efc 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -264,6 +264,30 @@ out_unlock: pthread_mutex_unlock(¬es->lock); } +static void evlist__resort_hists(struct evlist *evlist) +{ + struct evsel *pos; + + evlist__for_each_entry(evlist, pos) { + struct hists *hists = evsel__hists(pos); + + hists__collapse_resort(hists, NULL); + + /* Non-group events are considered as leader */ + if (symbol_conf.event_group && + !perf_evsel__is_group_leader(pos)) { + struct hists *leader_hists = evsel__hists(pos->leader); + + hists__match(leader_hists, hists); + hists__link(leader_hists, hists); + } + } + + evlist__for_each_entry(evlist, pos) { + perf_evsel__output_resort(pos, NULL); + } +} + static void perf_top__print_sym_table(struct perf_top *top) { char bf[160]; @@ -304,8 +328,7 @@ static void perf_top__print_sym_table(struct perf_top *top) } } - hists__collapse_resort(hists, NULL); - perf_evsel__output_resort(evsel, NULL); + evlist__resort_hists(top->evlist); hists__output_recalc_col_len(hists, top->print_entries - printed); putchar('\n'); @@ -570,8 +593,7 @@ static void perf_top__sort_new_samples(void *arg) } } - hists__collapse_resort(hists, NULL); - perf_evsel__output_resort(evsel, NULL); + evlist__resort_hists(t->evlist); if (t->lost || t->drop) pr_warning("Too slow to read ring buffer (change period (-c/-F) or limit CPUs (-C)\n"); -- 2.7.4