Messages in this thread | | | From | Namhyung Kim <> | Subject | Re: [PATCH perf/core 0/6] perf-probe: Bugfix and add new options for cache | Date | Wed, 05 Nov 2014 15:09:32 +0900 |
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Hi Masami,
On Tue, 04 Nov 2014 14:44:28 +0900, Masami Hiramatsu wrote: > (2014/11/04 12:14), Namhyung Kim wrote: >> Hi Masami, >> >> On Fri, 31 Oct 2014 14:51:29 -0400, Masami Hiramatsu wrote: >>> So by using all of them, we can make an "event cache" file on all >>> functions (except for inlined functions) as below. >>> >>> # perf probe --max-probes=100000 --no-inlines -a '* $params' -o event.cache >>> >>> builds "event.cache" file in which event settings for >>> all function entries, like below; >>> >>> p:probe/reset_early_page_tables _text+12980741 >>> p:probe/copy_bootdata _text+12980830 real_mode_data=%di:u64 >>> p:probe/exit_amd_microcode _text+14692680 >>> p:probe/early_make_pgtable _text+12981274 address=%di:u64 >>> p:probe/x86_64_start_reservations _text+12981700 real_mode_data=%di:u64 >>> p:probe/x86_64_start_kernel _text+12981744 real_mode_data=%di:u64 >>> p:probe/reserve_ebda_region _text+12982117 >> >> Does this event cache support kernel modules too? AFAIK it can have a >> different address whenever loaded even on a same kernel. > > Yes, for the modules perf probe uses target function symbol directly instead > of _text. > > ---- > perf probe -m xfs -o - -q -a xfs_acl_exists > p:probe/xfs_acl_exists xfs:xfs_acl_exists+0 > ----
Ah, great! :)
Thanks, Namhyung
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