Messages in this thread | | | Date | Fri, 9 Aug 2013 12:23:06 +0200 | From | Jiri Olsa <> | Subject | Re: [PATCHSET 00/17] perf tools: Introduce new 'ftrace' command (v4) |
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On Tue, Jul 30, 2013 at 06:18:57PM +0900, Namhyung Kim wrote: > This patchset implements a front-end tool for kernel's ftrace. It > uses function_graph tracer by default and normal function tracer is > also supported. (Of course you need to enable those tracers in your > kernel first.) > > v4 changes: > * use pid instead of tid for -p option (David) > * not to poll() for reading ftrace pipes (Jiri) > * rename to create_perf_header() (Jiri) > * canonicalize directory name (Jiri) > * show more info when -D option was given (Jiri) > * update documentation (Jiri) > * and few more bug fixes > > I pushed it out to 'perf/ftrace-v4' branch on my tree at: > > git://git.kernel.org/pub/scm/linux/kernel/git/namhyung/linux-perf.git
got following for record:
[root@dhcp-26-214 perf]# ./perf ftrace record kill usage: kill [ -s signal | -p ] [ -a ] pid ... kill -l [ signal ] recorder failed for some reason on cpu0 recorder failed for some reason on cpu1
afterwards 'perf ftrace report' gets stuck with 2 processes:
[jolsa@dhcp-26-214 perf]$ sudo pstack 1470 #0 0x00007f23ab61e997 in munmap () from /lib64/libc.so.6 #1 0x000000000047b5f7 in __perf_session__process_events () #2 0x000000000043f230 in do_ftrace_report () #3 0x0000000000440555 in cmd_ftrace () #4 0x000000000041aad3 in run_builtin () #5 0x000000000041a379 in main () [jolsa@dhcp-26-214 perf]$ sudo pstack 1471 #0 0x00007f23ab61b623 in __select_nocancel () from /lib64/libc.so.6 #1 0x000000000046a337 in pager_preexec () #2 0x000000000045f5a3 in start_command () #3 0x000000000046a4ab in setup_pager () #4 0x0000000000440535 in cmd_ftrace () #5 0x000000000041aad3 in run_builtin () #6 0x000000000041a379 in main ()
jirka
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