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b05d109398
Currently 'perf ftrace' command allows selecting 'function_graph' or 'function', defaulting to 'function_graph'. Add ftrace.tracer config option to select the default tracer: # cat ~/.perfconfig [ftrace] tracer = function # perf ftrace usleep 123456 | head -10 <...>-14450 [002] d... 10089.284231: finish_task_switch <-__schedule <...>-14450 [002] .... 10089.284232: finish_wait <-pipe_wait <...>-14450 [002] .... 10089.284232: mutex_lock <-pipe_wait <...>-14450 [002] .... 10089.284232: _cond_resched <-mutex_lock Committer notes: Retesting it with invalid variables, invalid values for ftrace.tracer, and a valid one: # cat ~/.perfconfig [ftrace] trace = function # perf ftrace usleep 1 Error: wrong config key-value pair ftrace.trace=function # cat ~/.perfconfig [ftrace] tracer = functin # perf ftrace usleep 1 Please select "function_graph" (default) or "function" Error: wrong config key-value pair ftrace.tracer=functin # cat ~/.perfconfig [ftrace] tracer = function # perf ftrace usleep 1 | head -5 <idle>-0 [000] d... 3855.820847: switch_mm_irqs_off <-__schedule <...>-18550 [000] d... 3855.820849: finish_task_switch <-__schedule <...>-18550 [000] d... 3855.820851: smp_irq_work_interrupt <-irq_work_interrupt <...>-18550 [000] d... 3855.820851: irq_enter <-smp_irq_work_interrupt <...>-18550 [000] d... 3855.820851: rcu_irq_enter <-irq_enter # 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: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/1485862711-20216-3-git-send-email-treeze.taeung@gmail.com [ Added missign space in error message, changed the logic to make it more compact and less error prone ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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.. | ||
accounting | ||
arch | ||
build | ||
cgroup | ||
firewire | ||
gpio | ||
hv | ||
iio | ||
include | ||
kvm/kvm_stat | ||
laptop | ||
leds | ||
lguest | ||
lib | ||
net | ||
nfsd | ||
objtool | ||
pcmcia | ||
perf | ||
power | ||
scripts | ||
spi | ||
testing | ||
thermal/tmon | ||
time | ||
usb | ||
virtio | ||
vm | ||
Makefile |