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Message-ID: <20160126161518.GA27589@krava.brq.redhat.com> Date: Tue, 26 Jan 2016 17:15:18 +0100 From: Jiri Olsa <jolsa@...hat.com> To: Namhyung Kim <namhyung@...nel.org> Cc: Arnaldo Carvalho de Melo <acme@...nel.org>, Ingo Molnar <mingo@...nel.org>, Peter Zijlstra <peterz@...radead.org>, Jiri Olsa <jolsa@...nel.org>, LKML <linux-kernel@...r.kernel.org>, Andi Kleen <andi@...stfloor.org>, David Ahern <dsahern@...il.com>, Frederic Weisbecker <fweisbec@...il.com>, Wang Nan <wangnan0@...wei.com> Subject: Re: [PATCHSET 00/12] perf tools: Apply percent-limit to callchains On Wed, Jan 27, 2016 at 12:54:17AM +0900, Namhyung Kim wrote: SNIP > > > > > > 0.04% 0.04% perf [kernel.vmlinux] [k] x86_pmu_enable > > > > > > 0.04% 0.04% perf [kernel.vmlinux] [k] native_apic_mem_write > > > > > > > > > > > > > > > > What's the problem? Now by default callchains under 0.5% (absolute) > > > > > will not be shown. I think this is intended output, and we need to > > > > > consider changing the default percent limit. > > > > > > > > hm, just the TUI shows +- for entries with no callchain > > > > > > Humm, this is an old bug, never got around to try to fix it, or is this > > > something you were not experiencing before this patchkit from Namhyung? > > > > > > > well, there were callchains present before this patchset ;-) > > That is because we apply percent limit to callchains now, and the > default is 0.5%. Before this patchset percent limit seems not applied > so you saw the callchains under the limit. I'm just saying that in TUI I see entries without callcains (which are filtered out) but those entries are still marked with +- ... I dont know if that's some old issue thanks, jirka --- + 0.08% 0.00% perf [kernel.vmlinux] [k] perf_pmu_enable.part.87 ▒ + 0.08% 0.00% perf [kernel.vmlinux] [k] perf_event_context_sched_in ▒ + 0.08% 0.00% perf [kernel.vmlinux] [k] perf_event_exec ▒ + 0.08% 0.00% perf [kernel.vmlinux] [k] setup_new_exec ▒ + 0.08% 0.00% perf [kernel.vmlinux] [k] load_elf_binary ▒ + 0.08% 0.00% perf [kernel.vmlinux] [k] search_binary_handler ▒ + 0.08% 0.00% perf [kernel.vmlinux] [k] do_execveat_common.isra.33 ▒ + 0.08% 0.00% perf [kernel.vmlinux] [k] sys_execve ▒ - 0.08% 0.00% perf [kernel.vmlinux] [k] return_from_execve ▒ - 0.08% 0.00% perf [unknown] [k] 0x00007f2175b35e07 ▒ - 0.04% 0.00% perf [kernel.vmlinux] [k] perf_event_nmi_handler ▒ - 0.04% 0.00% perf [kernel.vmlinux] [k] nmi_handle ▒ - 0.04% 0.00% perf [kernel.vmlinux] [k] default_do_nmi ▒ - 0.04% 0.00% perf [kernel.vmlinux] [k] do_nmi ▒ - 0.04% 0.00% perf [kernel.vmlinux] [k] end_repeat_nmi ▒ - 0.04% 0.04% perf [kernel.vmlinux] [k] x86_pmu_enable ▒ - 0.04% 0.04% perf [kernel.vmlinux] [k] native_apic_mem_write ▒
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