Merge tag 'perf-core-for-mingo' 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:
- Do event name substring search as last resort in 'perf list'.
(Arnaldo Carvalho de Melo)
E.g.:
# perf list clock
List of pre-defined events (to be used in -e):
cpu-clock [Software event]
task-clock [Software event]
uncore_cbox_0/clockticks/ [Kernel PMU event]
uncore_cbox_1/clockticks/ [Kernel PMU event]
kvm:kvm_pvclock_update [Tracepoint event]
kvm:kvm_update_master_clock [Tracepoint event]
power:clock_disable [Tracepoint event]
power:clock_enable [Tracepoint event]
power:clock_set_rate [Tracepoint event]
syscalls:sys_enter_clock_adjtime [Tracepoint event]
syscalls:sys_enter_clock_getres [Tracepoint event]
syscalls:sys_enter_clock_gettime [Tracepoint event]
syscalls:sys_enter_clock_nanosleep [Tracepoint event]
syscalls:sys_enter_clock_settime [Tracepoint event]
syscalls:sys_exit_clock_adjtime [Tracepoint event]
syscalls:sys_exit_clock_getres [Tracepoint event]
syscalls:sys_exit_clock_gettime [Tracepoint event]
syscalls:sys_exit_clock_nanosleep [Tracepoint event]
syscalls:sys_exit_clock_settime [Tracepoint event]
- Reduce min 'perf stat --interval-print/-I' to 10ms. (Kan Liang)
perf stat --interval in action:
# perf stat -e cycles -I 50 -a usleep $((200 * 1000))
print interval < 100ms. The overhead percentage could be high in some cases. Please proceed with caution.
# time counts unit events
0.050233636 48,240,396 cycles
0.100557098 35,492,594 cycles
0.150804687 39,295,112 cycles
0.201032269 33,101,961 cycles
0.201980732 786,379 cycles
#
- Allow for max_stack greater than PERF_MAX_STACK_DEPTH, as when
synthesizing callchains from Intel PT data. (Adrian Hunter)
- Allow probing on kmodules without DWARF. (Masami Hiramatsu)
- Fix a segfault when processing a perf.data file with callchains using
"perf report --call-graph none". (Namhyung Kim)
- Fix unresolved COMMs in 'perf top' when -s comm is used. (Namhyung Kim)
- Register idle thread in 'perf top'. (Namhyung Kim)
- Change 'record.samples' type to unsigned long long, fixing output of
number of samples in 32-bit architectures. (Yang Shi)
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
