On Tue, Jan 26, 2016 at 11:10:25PM +0900, Namhyung Kim wrote: > On Tue, Jan 26, 2016 at 02:27:26PM +0100, Jiri Olsa wrote: > > On Tue, Jan 26, 2016 at 09:51:59PM +0900, Namhyung Kim wrote: > > > On Tue, Jan 26, 2016 at 01:14:47PM +0100, Jiri Olsa wrote: > > > > On Sun, Jan 24, 2016 at 10:53:23PM +0900, Namhyung Kim wrote: > > > > > Hello, > > > > > > > > > > This patchset tries to implement percent limit to callchains which was > > > > > requested by Andi Kleen. For some reason, limiting callchains by > > > > > (overhead) percentage didn't work well. This patch fixes it and make > > > > > --percent-limit also works for callchains as well as hist entries. > > > > > > > > > > This is available on 'perf/callchain-limit-v1' branch in my tree: > > > > > > > > > > > > > > > git://git.kernel.org/pub/scm/linux/kernel/git/namhyung/linux-perf.git > > > > > > > > > > Any comments are welcome, > > > > > > > > > > Thanks, > > > > > Namhyung > > > > > > > > > > > > > > > Namhyung Kim (12): > > > > > perf report: Apply --percent-limit to callchains also > > > > > perf report: Apply callchain percent limit on --stdio > > > > > perf report: Get rid of hist_entry__callchain_fprintf() > > > > > perf report: Fix percent calculation on --stdio > > > > > perf report: Hide output pipe for percent-limited callchains on > > > > > stdio > > > > > perf hists browser: Fix dump to show correct callchain style > > > > > perf hists browser: Fix callchain_node__count_rows() > > > > > perf hists browser: Apply callchain percent limit > > > > > perf hists browser: Fix callchain counting when press ENTER key > > > > > perf hists browser: Fix counting callchains when expand/collapse all > > > > > perf hists browser: Update percent base for fractal callchain mode > > > > > perf report: Fix callchain percent limit on --gtk > > > > > > > > is 0.5 the default or one has to use the --percent-limit 0.5 > > > > for the limit to be effective? > > > > > > Yes, it's effective now. I also think we need to change the default > > > limit of 0.5. It was set for 'fractal' mode initially AFAIK so its > > > percentage is relative to each node. In this case 0.5% of limit makes > > > sense because it'll be a very small (absolute) value. > > > > > > But With 'graph' mode (now default), there're many entries under 0.5 > > > overhead and they silently won't show callchains anymore. Actually I > > > was confused by it when working with this patchset. > > > > > > What about 0.005% for the new default? > > > > > > > > > > > > > > without the option I'm getting empty callchains that are below 0.5 > > > > but only in TUI mode (attached).. --stdio shows them all unfolded > > > > > > It should not show them all. But I found that I missed a check for > > > a stdio case. Could you please test below? > > > > did not help, it's still there.. same output as before > > Hmm.. strange, could you show me the (part of) stdio output? >
yea, that one changed as well.. no callchains now, attached jirka --- [jolsa@krava perf]$ ./perf report --stdio ... 46.69% 46.69% ls [kernel.vmlinux] [k] intel_bts_enable_local | ---0x1000 __statfs entry_SYSCALL_64_fastpath sys_statfs SYSC_statfs user_statfs user_path_at_empty filename_lookup path_lookupat link_path_walk inode_permission __inode_permission kernfs_iop_permission kernfs_refresh_inode security_inode_notifysecctx selinux_inode_notifysecctx selinux_inode_setsecurity security_context_to_sid security_context_to_sid_core string_to_context_struct hashtab_search apic_timer_interrupt smp_apic_timer_interrupt local_apic_timer_interrupt hrtimer_interrupt __hrtimer_run_queues tick_sched_timer tick_sched_handle.isra.17 update_process_times scheduler_tick perf_event_task_tick perf_pmu_enable.part.87 x86_pmu_enable intel_pmu_enable_all intel_bts_enable_local 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