- 15 Apr, 2016 6 commits
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Arnaldo Carvalho de Melo authored
To reduce the chances we'll overflow the mmap buffer, manual fine tuning trumps this. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-wxygbxmp1v9mng1ea28wet02@git.kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
When the user doesn't set --mmap-pages, perf_evlist__mmap() will do it by reading the maximum possible for a non-root user from the /proc/sys/kernel/perf_event_mlock_kb file. Expose that function so that 'perf trace' can, for root users, to bump mmap-pages to a higher value for root, based on the contents of this proc file. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-xay69plylwibpb3l4isrpl1k@git.kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
If one uses: # perf trace --min-stack 16 Then it implicitly means that callgraphs should be enabled, and the best option in terms of widespread availability is "dwarf". Further work needed to choose a better alternative, LBR, in capable systems. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-xtjmnpkyk42npekxz3kynzmx@git.kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
To be able to call it outside option parsing, like when setting a default --call-graph parameter in 'perf trace' when just --min-stack is used. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-xay69plylwibpb3l4isrpl1k@git.kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
Counterpart to --max-stack, to help focusing on deeply nested calls. Can be combined with --duration, etc. E.g.: System wide syscall tracing looking for call stacks longer than 66: # trace --mmap-pages 32768 --filter-pid 2711 --call-graph dwarf,16384 --min-stack 66 Or more compactly: # trace -m 32768 --filt 2711 --call dwarf,16384 --min-st 66 363.027 ( 0.002 ms): gnome-shell/2287 poll(ufds: 0x7ffc5ea24230, nfds: 1, timeout_msecs: 4294967295 ) = 1 [0xf6fdd] (/usr/lib64/libc-2.22.so) _xcb_conn_wait+0x92 (/usr/lib64/libxcb.so.1.1.0) _xcb_out_send+0x4d (/usr/lib64/libxcb.so.1.1.0) xcb_writev+0x45 (/usr/lib64/libxcb.so.1.1.0) _XSend+0x19e (/usr/lib64/libX11.so.6.3.0) _XReply+0x82 (/usr/lib64/libX11.so.6.3.0) XSync+0x4d (/usr/lib64/libX11.so.6.3.0) dri3_bind_tex_image+0x42 (/usr/lib64/libGL.so.1.2.0) _cogl_winsys_texture_pixmap_x11_update+0x117 (/usr/lib64/libcogl.so.20.4.1) _cogl_texture_pixmap_x11_update+0x67 (/usr/lib64/libcogl.so.20.4.1) _cogl_texture_pixmap_x11_pre_paint+0x13 (/usr/lib64/libcogl.so.20.4.1) _cogl_pipeline_layer_pre_paint+0x5e 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g_signal_emit+0x8f (/usr/lib64/libgobject-2.0.so.0.4600.2) clutter_actor_continue_paint+0x2bb (/usr/lib64/libclutter-1.0.so.0.2400.2) clutter_actor_paint.part.41+0x47b (/usr/lib64/libclutter-1.0.so.0.2400.2) clutter_actor_real_paint+0x20 (/usr/lib64/libclutter-1.0.so.0.2400.2) meta_window_actor_paint+0x14b (/usr/lib64/libmutter.so.0.0.0) _g_closure_invoke_va+0xb2 (/usr/lib64/libgobject-2.0.so.0.4600.2) g_signal_emit_valist+0xc0d (/usr/lib64/libgobject-2.0.so.0.4600.2) g_signal_emit+0x8f (/usr/lib64/libgobject-2.0.so.0.4600.2) clutter_actor_continue_paint+0x2bb (/usr/lib64/libclutter-1.0.so.0.2400.2) clutter_actor_paint.part.41+0x47b (/usr/lib64/libclutter-1.0.so.0.2400.2) clutter_actor_real_paint+0x20 (/usr/lib64/libclutter-1.0.so.0.2400.2) meta_window_group_paint+0x19f (/usr/lib64/libmutter.so.0.0.0) _g_closure_invoke_va+0xb2 (/usr/lib64/libgobject-2.0.so.0.4600.2) g_signal_emit_valist+0xc0d (/usr/lib64/libgobject-2.0.so.0.4600.2) g_signal_emit+0x8f 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clutter_actor_paint.part.41+0x47b (/usr/lib64/libclutter-1.0.so.0.2400.2) _clutter_stage_do_paint+0x17b (/usr/lib64/libclutter-1.0.so.0.2400.2) clutter_stage_cogl_redraw+0x496 (/usr/lib64/libclutter-1.0.so.0.2400.2) _clutter_stage_do_update+0x117 (/usr/lib64/libclutter-1.0.so.0.2400.2) clutter_clock_dispatch+0x169 (/usr/lib64/libclutter-1.0.so.0.2400.2) g_main_context_dispatch+0x15a (/usr/lib64/libglib-2.0.so.0.4600.2) g_main_context_iterate.isra.29+0x1e0 (/usr/lib64/libglib-2.0.so.0.4600.2) g_main_loop_run+0xc2 (/usr/lib64/libglib-2.0.so.0.4600.2) meta_run+0x2c (/usr/lib64/libmutter.so.0.0.0) main+0x3f7 (/usr/bin/gnome-shell) __libc_start_main+0xf0 (/usr/lib64/libc-2.22.so) [0x2909] (/usr/bin/gnome-shell) 363.038 ( 0.006 ms): gnome-shell/2287 writev(fd: 5<socket:[32540]>, vec: 0x7ffc5ea243a0, vlen: 3 ) = 4 __GI___writev+0x2d (/usr/lib64/libc-2.22.so) _xcb_conn_wait+0x359 (/usr/lib64/libxcb.so.1.1.0) _xcb_out_send+0x4d (/usr/lib64/libxcb.so.1.1.0) xcb_writev+0x45 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clutter_actor_paint.part.41+0x47b (/usr/lib64/libclutter-1.0.so.0.2400.2) clutter_stage_paint+0x3a (/usr/lib64/libclutter-1.0.so.0.2400.2) meta_stage_paint+0x45 (/usr/lib64/libmutter.so.0.0.0) _g_closure_invoke_va+0x164 (/usr/lib64/libgobject-2.0.so.0.4600.2) g_signal_emit_valist+0xc0d (/usr/lib64/libgobject-2.0.so.0.4600.2) g_signal_emit+0x8f (/usr/lib64/libgobject-2.0.so.0.4600.2) clutter_actor_continue_paint+0x2bb (/usr/lib64/libclutter-1.0.so.0.2400.2) clutter_actor_paint.part.41+0x47b (/usr/lib64/libclutter-1.0.so.0.2400.2) _clutter_stage_do_paint+0x17b (/usr/lib64/libclutter-1.0.so.0.2400.2) clutter_stage_cogl_redraw+0x496 (/usr/lib64/libclutter-1.0.so.0.2400.2) _clutter_stage_do_update+0x117 (/usr/lib64/libclutter-1.0.so.0.2400.2) clutter_clock_dispatch+0x169 (/usr/lib64/libclutter-1.0.so.0.2400.2) g_main_context_dispatch+0x15a (/usr/lib64/libglib-2.0.so.0.4600.2) g_main_context_iterate.isra.29+0x1e0 (/usr/lib64/libglib-2.0.so.0.4600.2) g_main_loop_run+0xc2 (/usr/lib64/libglib-2.0.so.0.4600.2) meta_run+0x2c (/usr/lib64/libmutter.so.0.0.0) main+0x3f7 (/usr/bin/gnome-shell) __libc_start_main+0xf0 (/usr/lib64/libc-2.22.so) [0x2909] (/usr/bin/gnome-shell) 363.086 ( 0.042 ms): gnome-shell/2287 poll(ufds: 0x7ffc5ea24250, nfds: 1, timeout_msecs: 4294967295 ) = 1 [0xf6fdd] (/usr/lib64/libc-2.22.so) _xcb_conn_wait+0x92 (/usr/lib64/libxcb.so.1.1.0) wait_for_reply+0xb7 (/usr/lib64/libxcb.so.1.1.0) xcb_wait_for_reply+0x61 (/usr/lib64/libxcb.so.1.1.0) _XReply+0x127 (/usr/lib64/libX11.so.6.3.0) XSync+0x4d (/usr/lib64/libX11.so.6.3.0) dri3_bind_tex_image+0x42 (/usr/lib64/libGL.so.1.2.0) _cogl_winsys_texture_pixmap_x11_update+0x117 (/usr/lib64/libcogl.so.20.4.1) _cogl_texture_pixmap_x11_update+0x67 (/usr/lib64/libcogl.so.20.4.1) _cogl_texture_pixmap_x11_pre_paint+0x13 (/usr/lib64/libcogl.so.20.4.1) _cogl_pipeline_layer_pre_paint+0x5e (/usr/lib64/libcogl.so.20.4.1) _cogl_rectangles_validate_layer_cb+0x1b (/usr/lib64/libcogl.so.20.4.1) 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clutter_actor_paint.part.41+0x47b (/usr/lib64/libclutter-1.0.so.0.2400.2) [0x3d970] (/usr/lib64/gnome-shell/libgnome-shell.so) _g_closure_invoke_va+0xb2 (/usr/lib64/libgobject-2.0.so.0.4600.2) g_signal_emit_valist+0xc0d (/usr/lib64/libgobject-2.0.so.0.4600.2) g_signal_emit+0x8f (/usr/lib64/libgobject-2.0.so.0.4600.2) clutter_actor_continue_paint+0x2bb (/usr/lib64/libclutter-1.0.so.0.2400.2) clutter_actor_paint.part.41+0x47b (/usr/lib64/libclutter-1.0.so.0.2400.2) clutter_stage_paint+0x3a (/usr/lib64/libclutter-1.0.so.0.2400.2) meta_stage_paint+0x45 (/usr/lib64/libmutter.so.0.0.0) _g_closure_invoke_va+0x164 (/usr/lib64/libgobject-2.0.so.0.4600.2) g_signal_emit_valist+0xc0d (/usr/lib64/libgobject-2.0.so.0.4600.2) g_signal_emit+0x8f (/usr/lib64/libgobject-2.0.so.0.4600.2) clutter_actor_continue_paint+0x2bb (/usr/lib64/libclutter-1.0.so.0.2400.2) clutter_actor_paint.part.41+0x47b (/usr/lib64/libclutter-1.0.so.0.2400.2) _clutter_stage_do_paint+0x17b (/usr/lib64/libclutter-1.0.so.0.2400.2) clutter_stage_cogl_redraw+0x496 (/usr/lib64/libclutter-1.0.so.0.2400.2) _clutter_stage_do_update+0x117 (/usr/lib64/libclutter-1.0.so.0.2400.2) clutter_clock_dispatch+0x169 (/usr/lib64/libclutter-1.0.so.0.2400.2) g_main_context_dispatch+0x15a (/usr/lib64/libglib-2.0.so.0.4600.2) g_main_context_iterate.isra.29+0x1e0 (/usr/lib64/libglib-2.0.so.0.4600.2) g_main_loop_run+0xc2 (/usr/lib64/libglib-2.0.so.0.4600.2) meta_run+0x2c (/usr/lib64/libmutter.so.0.0.0) main+0x3f7 (/usr/bin/gnome-shell) __libc_start_main+0xf0 (/usr/lib64/libc-2.22.so) [0x2909] (/usr/bin/gnome-shell) Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-jncuxju9fibq2rl6olhqwjw6@git.kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
With multiple threads, e.g. a system wide trace session, and one syscall is midway in a thread and another thread starts another syscall we must print the start of the interrupted syscall followed by ..., but that can't be done that way when we use the --duration filter, as we have to wait for the syscall exit to calculate the duration and decide if it should be filtered, so we have to disable the interrupted logic and only print at syscall exit, duh. Before: # trace --duration 100 <SNIP> 9.248 (0.023 ms): gnome-shell/2287 poll(ufds: 0x7ffc5ea26580, nfds: 1, timeout_msecs: 4294967295) ... 9.296 (0.001 ms): gnome-shell/2287 recvmsg(fd: 11<socket:[35818]>, msg: 0x7ffc5ea264a0 ) ... 9.311 (0.008 ms): Xorg/2025 select(n: 512, inp: 0x83a8e0, tvp: 0x8316a0 ) ... 9.859 (0.023 ms): gnome-shell/2287 poll(ufds: 0x7ffc5ea24250, nfds: 1, timeout_msecs: 4294967295) ... 9.942 (0.051 ms): Xorg/2025 select(n: 512, inp: 0x83a8e0, tvp: 0x8316a0 ) ... 10.467 (0.003 ms): gnome-shell/2287 poll(ufds: 0x55e623431220, nfds: 50, timeout_msecs: 4294967295) ... 11.136 (0.382 ms): Xorg/2025 select(n: 512, inp: 0x83a8e0, tvp: 0x8316a0 ) ... 11.223 (0.023 ms): SoftwareVsyncT/24369 futex(uaddr: 0x7f5ec5df8c14, op: WAIT_BITSET|PRIV, val: 1, utime: 0x7f5ec5df8b68, val3: 4294967295) ... 16.865 (5.501 ms): firefox/24321 poll(ufds: 0x7f5ec388b460, nfds: 6, timeout_msecs: 4294967295 ) ... 22.571 (0.006 ms): Xorg/2025 select(n: 512, inp: 0x83a8e0, tvp: 0x8316a0 ) ... 26.793 (4.063 ms): gnome-shell/2287 poll(ufds: 0x55e623431220, nfds: 50, timeout_msecs: 4294967295) ... 26.917 (0.080 ms): Xorg/2025 select(n: 512, inp: 0x83a8e0, tvp: 0x8316a0 ) ... 27.291 (0.355 ms): qemu-system-x8/10065 ppoll(ufds: 0x55c98b39e400, nfds: 72, tsp: 0x7fffe4e4fe60, sigsetsize: 8) ... 27.336 (0.012 ms): SoftwareVsyncT/24369 futex(uaddr: 0x7f5ec5df8c14, op: WAIT_BITSET|PRIV, val: 1, utime: 0x7f5ec5df8b68, val3: 4294967295) ... 33.370 (5.958 ms): firefox/24321 poll(ufds: 0x7f5ec388b460, nfds: 6, timeout_msecs: 4294967295) ... 33.866 (0.021 ms): Xorg/2025 select(n: 512, inp: 0x83a8e0, tvp: 0x8316a0 ) ... 35.762 (1.611 ms): gnome-shell/2287 poll(ufds: 0x55e623431220, nfds: 50, timeout_msecs: 8 ) ... 38.765 (2.910 ms): Xorg/2025 select(n: 512, inp: 0x83a8e0, tvp: 0x8316a0 ) ... After: # trace --duration 100 238.292 (153.226 ms): hexchat/2786 poll(ufds: 0x559ea372f370, nfds: 6, timeout_msecs: 153) = 0 Timeout 249.634 (199.433 ms): Xorg/2025 select(n: 512, inp: 0x83a8e0, tvp: 0x7ffdcbb63610 ) = 1 385.583 (147.257 ms): hexchat/2786 poll(ufds: 0x559ea372f370, nfds: 6, timeout_msecs: 147) = 0 Timeout 397.166 (110.779 ms): gnome-shell/2287 poll(ufds: 0x55e623431220, nfds: 50, timeout_msecs: 4294967295) = 1 601.839 (132.066 ms): Xorg/2025 select(n: 512, inp: 0x83a8e0, tvp: 0x8316a0 ) = 1 602.445 (132.679 ms): gnome-shell/2287 poll(ufds: 0x55e623431220, nfds: 50, timeout_msecs: 4294967295) = 1 686.122 (300.418 ms): hexchat/2786 poll(ufds: 0x559ea372f370, nfds: 6, timeout_msecs: 300) = 0 Timeout 815.033 (184.641 ms): JS Helper/24352 futex(uaddr: 0x7f5ed98e584c, op: WAIT|PRIV, val: 1149859) = 0 825.868 (195.469 ms): JS Helper/24351 futex(uaddr: 0x7f5ed98e584c, op: WAIT|PRIV, val: 1149860) = 0 840.738 (210.335 ms): JS Helper/24350 futex(uaddr: 0x7f5ed98e584c, op: WAIT|PRIV, val: 1149861) = 0 914.898 (158.692 ms): Compositor/24363 futex(uaddr: 0x7f5ec8dfebf4, op: WAIT|PRIV, val: 1) = 0 915.199 (100.747 ms): Timer/24358 futex(uaddr: 0x7f5ed98e56cc, op: WAIT_BITSET|PRIV|CLKRT, val: 2545397, utime: 0x7f5ecdbfec30, val3: 4294967295) = 0 986.639 (247.325 ms): hexchat/2786 poll(ufds: 0x559ea372f370, nfds: 6, timeout_msecs: 247) = 0 Timeout 996.239 (500.591 ms): chrome/16237 poll(ufds: 0x3ecd739bd0, nfds: 5, timeout_msecs: 500) = 0 Timeout 1042.890 (120.076 ms): Timer/24358 futex(uaddr: 0x7f5ed98e56cc, op: WAIT_BITSET|PRIV|CLKRT, val: 2545403, utime: 0x7f5ecdbfec30, val3: 4294967295) = -1 ETIMEDOUT Connection timed out Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-d2nay6kjax5ro991c9kelvi5@git.kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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- 14 Apr, 2016 21 commits
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Arnaldo Carvalho de Melo authored
They still use functions that would drag more stuff to the python binding, where these fprintf methods are not used, so separate it. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-xfp0mgq3hh3px61di6ixi1jk@git.kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
Similar to the one in the other tools (report, script, top). Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-lh7kk5a5t3erwxw31ah0cgar@git.kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
Works just like with 'perf report'. In some cases we may want to have more than 127 entries, the default maximum. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-mqkz2p5ok2978gztb0vsnocc@git.kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
Not used at all, nuke it. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-jf2w8ce8nl3wso3vuodg5jci@git.kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
This way the print routine merely does printing, not requiring access to the resolving machinery, which helps disentangling the object files and easing creating subsets with a limited functionality set. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-2ti2jbra8fypdfawwwm3aee3@git.kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
To disentangle symbol printing from all the code related to symbol tables, resolution of addresses to symbols, etc. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-eik9g3hbtdc7ddv57f1d4v3p@git.kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
# perf test -v python 16: Try 'import perf' in python, checking link problems : --- start --- test child forked, pid 672 Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: /tmp/build/perf/python/perf.so: undefined symbol: symbol_conf test child finished with -1 ---- end ---- Try 'import perf' in python, checking link problems: FAILED! # To fix it just pass a parameter to perf_evsel__fprintf_sym telling if callchains should be printed. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-comrsr20bsnr8bg0n6rfwv12@git.kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
The recent perf_evsel__fprintf_callchain() move to evsel.c added several new symbol requirements to the python binding, for instance: # perf test -v python 16: Try 'import perf' in python, checking link problems : --- start --- test child forked, pid 18030 Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: /tmp/build/perf/python/perf.so: undefined symbol: callchain_cursor test child finished with -1 ---- end ---- Try 'import perf' in python, checking link problems: FAILED! # This would require linking against callchain.c to access to the global callchain_cursor variables. Since lots of functions already receive as a parameter a callchain_cursor struct pointer, make that be the case for some more function so that we can start phasing out usage of yet another global variable. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-djko3097eyg2rn66v2qcqfvn@git.kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
To reduce the size of builtin-trace.c. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-ao91htwxdqwlwxr47gbluou1@git.kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Ingo Molnar authored
Merge tag 'perf-core-for-mingo-20160414' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core Pull perf/core improvements from Arnaldo Carvalho de Melo: User visible changes: - Introduce 'perf record --timestamp-filename', to add a timestamp at the end of the 'perf data' file. Will get added value when the patch to make 'perf.data' file snapshots gets merged (Wang Nan) - Fix display of variables present in both --config and --user in 'perf list' (Taeung Song) Build fixes: - Add seccomp and getradom beautifier related defines to fix the build in older systems where those definitions are not available (Arnaldo Carvalho de Melo) Signed-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by:
Ingo Molnar <mingo@kernel.org>
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Taeung Song authored
Currently show_config() has a problem when user and system config files have the same config variables i.e.: # cat ~/.perfconfig [top] children = false When $(sysconfdir) is /usr/local/etc # cat /usr/local/etc/perfconfig [top] children = true Before: # perf config --user --list top.children=false # perf config --system --list top.children=true # perf config --list top.children=true top.children=false Because perf_config() can call show_config() each the config file (user and system). Fix it. After: # perf config --user --list top.children=false # perf config --system --list top.children=true # perf config --list top.children=false Signed-off-by:
Taeung Song <treeze.taeung@gmail.com> Tested-by:
Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1460620401-23430-3-git-send-email-treeze.taeung@gmail.comSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Taeung Song authored
This infrastructure code was designed for upcoming features of 'perf config'. That collect config key-value pairs from user and system config files (i.e. user wide ~/.perfconfig and system wide $(sysconfdir)/perfconfig) to manage perf's configs. Reviewed-by:
Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by:
Taeung Song <treeze.taeung@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1460620401-23430-2-git-send-email-treeze.taeung@gmail.comSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Wang Nan authored
This option appends current timestamp to the output file name. For example: # perf record -a --timestamp-filename ^C[ perf record: Woken up 1 times to write data ] [ perf record: Dump perf.data.2015122622265847 ] [ perf record: Captured and wrote 0.742 MB perf.data.<timestamp> (90 samples) ] # ls perf.data.201512262226584 The timestamp will be useful for identifying each perf.data after the 'perf record' support for generating multiple output files gets introduced. Signed-off-by:
Wang Nan <wangnan0@huawei.com> Tested-by:
Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1460535673-159866-5-git-send-email-wangnan0@huawei.comSigned-off-by:
He Kuang <hekuang@huawei.com> Signed-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Wang Nan authored
auxtrace_snapshot_enable has only two states (0/1). Turns it into a triple states enum so SIGUSR2 handler can safely do other works without triggering auxtrace snapshot. Signed-off-by:
Wang Nan <wangnan0@huawei.com> Acked-by:
Adrian Hunter <adrian.hunter@intel.com> Acked-by:
Jiri Olsa <jolsa@kernel.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1460535673-159866-4-git-send-email-wangnan0@huawei.comSigned-off-by:
He Kuang <hekuang@huawei.com> Signed-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Wang Nan authored
perf_data_file__switch() closes current output file, renames it, then open a new one to continue recording. It will be used by 'perf record' to split output into multiple perf.data files. Signed-off-by:
Wang Nan <wangnan0@huawei.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1460535673-159866-3-git-send-email-wangnan0@huawei.comSigned-off-by:
He Kuang <hekuang@huawei.com> Signed-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Wang Nan authored
ordered_events__free() leaves linked lists and timestamps not cleared, so unable to be reused after ordered_events__free(). Which is inconvenient after 'perf record' supports generating multiple perf.data output and process build-ids for each of them. Use ordered_events__reinit() for this. Signed-off-by:
Wang Nan <wangnan0@huawei.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1460535673-159866-2-git-send-email-wangnan0@huawei.comSigned-off-by:
He Kuang <hekuang@huawei.com> [ Split from larger patch ] Signed-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Wang Nan authored
'perf record' will use this when outputting multiple perf.data files. Signed-off-by:
Wang Nan <wangnan0@huawei.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1460535673-159866-2-git-send-email-wangnan0@huawei.comSigned-off-by:
He Kuang <hekuang@huawei.com> [ Split from larger patch ] Signed-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
To better organize all these beautifiers. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-zrw5zz7cnrs44o5osouyutvt@git.kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
To better organize all these beautifiers. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-zbr27mdy9ssdhux3ib2nfa7j@git.kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
Were the detached tarball (make perf-tar-src-pkg) build was failing because those definitions aren't available in the system headers. On RHEL7, for instance: builtin-trace.c: In function ‘syscall_arg__scnprintf_getrandom_flags’: builtin-trace.c:1113:14: error: ‘GRND_RANDOM’ undeclared (first use in this function) P_FLAG(RANDOM); ^ builtin-trace.c:1114:14: error: ‘GRND_NONBLOCK’ undeclared (first use in this function) P_FLAG(NONBLOCK); ^ Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-r8496g24a3kbqynvk6617b0e@git.kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
Were the detached tarball (make perf-tar-src-pkg) build was failing because those definitions aren't available in the system headers. On RHEL7, for instance: builtin-trace.c: In function ‘syscall_arg__scnprintf_seccomp_op’: builtin-trace.c:1069:7: error: ‘SECCOMP_SET_MODE_STRICT’ undeclared (first use in this function) P_SECCOMP_SET_MODE_OP(STRICT); ^ builtin-trace.c:1069:7: note: each undeclared identifier is reported only once for each function it appears in builtin-trace.c:1070:7: error: ‘SECCOMP_SET_MODE_FILTER’ undeclared (first use in this function) P_SECCOMP_SET_MODE_OP(FILTER); ^ builtin-trace.c: In function ‘syscall_arg__scnprintf_seccomp_flags’: builtin-trace.c:1091:14: error: ‘SECCOMP_FILTER_FLAG_TSYNC’ undeclared (first use in this function) P_FLAG(TSYNC); ^ Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-4f8dzzwd7g6l5dzz693u7kul@git.kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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- 13 Apr, 2016 13 commits
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Ingo Molnar authored
Merge tag 'perf-core-for-mingo-20160413' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo: User visible changes: - Print callchains asked for events requested via 'perf trace --event' too: (Arnaldo Carvalho de Melo) # trace -e nanosleep --call dwarf --event sched:sched_switch/call-graph=fp/ usleep 1 0.346 (0.005 ms): usleep/24428 nanosleep(rqtp: 0x7fffa15a0540) ... 0.346 ( ): sched:sched_switch:usleep:24428 [120] S ==> swapper/3:0 [120]) __schedule+0xfe200402 ([kernel.kallsyms]) schedule+0xfe200035 ([kernel.kallsyms]) do_nanosleep+0xfe20006f ([kernel.kallsyms]) hrtimer_nanosleep+0xfe2000dc ([kernel.kallsyms]) sys_nanosleep+0xfe20007a ([kernel.kallsyms]) do_syscall_64+0xfe200062 ([kernel.kallsyms]) return_from_SYSCALL_64+0xfe200000 ([kernel.kallsyms]) __nanosleep+0xffff005b8d602010 (/usr/lib64/libc-2.22.so) 0.400 (0.059 ms): usleep/24428 ... [continued]: nanosleep()) = 0 __nanosleep+0x10 (/usr/lib64/libc-2.22.so) usleep+0x34 (/usr/lib64/libc-2.22.so) main+0x1eb (/usr/bin/usleep) __libc_start_main+0xf0 (/usr/lib64/libc-2.22.so) _start+0x29 (/usr/bin/usleep) - Allow requesting that some CPUs or PIDs be highlighted in 'perf sched map' (Jiri Olsa) - Compact 'perf sched map' to show just CPUs with activity, improving the output in high core count systems (Jiri Olsa) - Fix segfault with 'perf trace --no-syscalls -e syscall-names' by bailing out such request, doesn't make sense to ask for no syscalls and then specify which ones should be printed (Arnaldo Carvalho de Melo) Signed-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by:
Ingo Molnar <mingo@kernel.org>
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Arnaldo Carvalho de Melo authored
Doesn't make sense and was causing a segfault, fix it. # trace -e clone --no-syscalls --event sched:*exec firefox The -e option can't be used with --no-syscalls. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-ccrahezikdk2uebptzr1eyyi@git.kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
Those were converted to be evsel methods long ago, move the source to where it belongs. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-vja8rjmkw3gd5ungaeyb5s2j@git.kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Jiri Olsa authored
Introducing --cpus option that will display only given cpus. Could be used together with color-cpus option. $ perf sched map --cpus 0,1 *A0 309999.786924 secs A0 => rcu_sched:7 *. 309999.786930 secs *B0 . 309999.786931 secs B0 => rcuos/2:25 B0 *A0 309999.786947 secs Signed-off-by:
Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1460467771-26532-9-git-send-email-jolsa@kernel.org [ Added entry to man page ] Signed-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Jiri Olsa authored
Adding --color-cpus option to display selected cpus with background color (red by default). It helps on navigating through the perf sched map output. Signed-off-by:
Jiri Olsa <jolsa@kernel.org> Tested-by:
Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1460467771-26532-8-git-send-email-jolsa@kernel.org [ Added entry to man page ] Signed-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Jiri Olsa authored
Adding --color-pids option to display selected pids in color (blue by default). It helps on navigating through the 'perf sched map' output. Signed-off-by:
Jiri Olsa <jolsa@kernel.org> Tested-by:
Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1460467771-26532-7-git-send-email-jolsa@kernel.org [ Added entry to man page ] Signed-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Jiri Olsa authored
It will be used in following patch. Signed-off-by:
Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1460467771-26532-6-git-send-email-jolsa@kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Jiri Olsa authored
As preparation for next patch. Signed-off-by:
Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1460467771-26532-5-git-send-email-jolsa@kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Jiri Olsa authored
Add compact map display that does not output the whole cpu matrix, only cpus that got event. $ perf sched map --compact *A0 1082427.094098 secs A0 => perf:19404 (CPU 2) A0 *. 1082427.094127 secs . => swapper:0 (CPU 1) A0 . *B0 1082427.094174 secs B0 => rcuos/2:25 (CPU 3) A0 . *. 1082427.094177 secs *C0 . . 1082427.094187 secs C0 => migration/2:21 C0 *A0 . 1082427.094193 secs *. A0 . 1082427.094195 secs *D0 A0 . 1082427.094402 secs D0 => rngd:968 *. A0 . 1082427.094406 secs . *E0 . 1082427.095221 secs E0 => kworker/1:1:5333 . E0 *F0 1082427.095227 secs F0 => xterm:3342 It helps to display sane output for small thread loads on big cpu servers. Signed-off-by:
Jiri Olsa <jolsa@kernel.org> Tested-by:
Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1460467771-26532-4-git-send-email-jolsa@kernel.org [ Add entry in 'perf sched' man page ] Signed-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Jiri Olsa authored
Adding cpu_map__has() to return bool of cpu presence in cpus map. Signed-off-by:
Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1460467771-26532-3-git-send-email-jolsa@kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Jiri Olsa authored
Adding thread_map__has() to return bool of pid presence in threads map. Signed-off-by:
Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1460467771-26532-2-git-send-email-jolsa@kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
We already were able to ask for callchains for a specific event: # trace -e nanosleep --call dwarf --event sched:sched_switch/call-graph=fp/ usleep 1 This would enable tracing just the "nanosleep" syscall, with callchains at syscall exit and would ask the kernel for frame pointer callchains to be enabled for the "sched:sched_switch" tracepoint event, its just that we were not resolving the callchain and printing it in 'perf trace', do it: # trace -e nanosleep --call dwarf --event sched:sched_switch/call-graph=fp/ usleep 1 0.425 ( 0.013 ms): usleep/6718 nanosleep(rqtp: 0x7ffcc1d16e20) ... 0.425 ( ): sched:sched_switch:usleep:6718 [120] S ==> swapper/2:0 [120]) __schedule+0xfe200402 ([kernel.kallsyms]) schedule+0xfe200035 ([kernel.kallsyms]) do_nanosleep+0xfe20006f ([kernel.kallsyms]) hrtimer_nanosleep+0xfe2000dc ([kernel.kallsyms]) sys_nanosleep+0xfe20007a ([kernel.kallsyms]) do_syscall_64+0xfe200062 ([kernel.kallsyms]) return_from_SYSCALL_64+0xfe200000 ([kernel.kallsyms]) __nanosleep+0xffff008b8cbe2010 (/usr/lib64/libc-2.22.so) 0.486 ( 0.073 ms): usleep/6718 ... [continued]: nanosleep()) = 0 __nanosleep+0x10 (/usr/lib64/libc-2.22.so) usleep+0x34 (/usr/lib64/libc-2.22.so) main+0x1eb (/usr/bin/usleep) __libc_start_main+0xf0 (/usr/lib64/libc-2.22.so) _start+0x29 (/usr/bin/usleep) # Pretty compact, huh? DWARF callchains for raw_syscalls:sys_exit + frame pointer callchains for a tracepoint, if your hardware supports LBR, go wild with /call-graph=lbr/, guess the next step is to lift this from 'perf script': -F, --fields <str> comma separated output fields prepend with 'type:'. Valid types: hw,sw,trace,raw. Fields: comm,tid,pid,time,cpu,event,trace,ip,sym,dso,addr,symoff,period,iregs,brstack,brstacksym,flags Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-2e7yiv5hqdm8jywlmfivvx2v@git.kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Peter Zijlstra authored
The new sanity check introduced by: 26657848 ("perf/core: Verify we have a single perf_hw_context PMU") ... triggered on the AMD uncore driver. Uncore PMUs are per node, they cannot have per-task counters. Fix it. Reported-by:
Borislav Petkov <bp@suse.de> Reported-by:
Ingo Molnar <mingo@kernel.org> Tested-by:
Borislav Petkov <bp@suse.de> Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: acme@redhat.com Cc: alexander.shishkin@linux.intel.com Cc: eranian@google.com Cc: jolsa@redhat.com Cc: linux-tip-commits@vger.kernel.org Cc: vincent.weaver@maine.edu Link: http://lkml.kernel.org/r/20160404140208.GA3448@twins.programming.kicks-ass.netSigned-off-by:
Ingo Molnar <mingo@kernel.org>
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