Hi,
On 12.01.2021 15:55, Bixuan Cui wrote: > Add documentation for 'perf irq' command. > > Signed-off-by: Bixuan Cui <[email protected]> > --- > tools/perf/Documentation/perf-irq.txt | 58 +++++++++++++++++++++++++++ > tools/perf/command-list.txt | 1 + > 2 files changed, 59 insertions(+) > create mode 100644 tools/perf/Documentation/perf-irq.txt > > diff --git a/tools/perf/Documentation/perf-irq.txt > b/tools/perf/Documentation/perf-irq.txt > new file mode 100644 > index 000000000000..8c0e388dad59 > --- /dev/null > +++ b/tools/perf/Documentation/perf-irq.txt > @@ -0,0 +1,58 @@ > +perf-irq(1) > +============= > + > +NAME > +---- > +perf-irq - Tool to trace/measure hardware interrupts > + > +SYNOPSIS > +-------- > +[verse] > +'perf irq' {record|timeconsume|script} > + > +DESCRIPTION > +----------- > +There are several variants of 'perf irq': > + > + 'perf irq record <command>' to record the irq handler events > + of an arbitrary workload. > + > + 'perf irq script' to see a detailed trace of the workload that > + was recorded (aliased to 'perf script' for now). > + > + 'perf irq timeconsume' to calculate the time consumed by each > + hardware interrupt processing function. > + > + Example usage: > + perf irq record -- sleep 1 > + perf irq timeconsume This timeconsume mode looks more like: perf irq report <options> > + > + By default it shows the individual irq events, including the irq name, > + cpu(execute the hardware interrupt processing function), time consumed, > + entry time and exit time for the each hardware irq: > + > + > ------------------------------------------------------------------------------------------------------------------------------------------- > + Irq name | CPU | Time consume us | Handler entry time | > Handler exit time > + > ------------------------------------------------------------------------------------------------------------------------------------------- > + enp2s0f2-tx-0 | [0006] | 0.000001 s | 6631263.313329 s | > 6631263.313330 s > + > + > ------------------------------------------------------------------------------------------------------------------------------------------- > + Irq name | CPU | Time consume us | Handler entry time | > Handler exit time > + > ------------------------------------------------------------------------------------------------------------------------------------------- > + megasas | [0013] | 0.000003 s | 6631263.209564 s | > 6631263.209567 s > + > + > ------------------------------------------------------------------------------------------------------------------------------------------- > + Irq name | CPU | Time consume us | Handler entry time | > Handler exit time > + > ------------------------------------------------------------------------------------------------------------------------------------------- > + acpi | [0016] | 0.000018 s | 6631263.085787 s | > 6631263.085805 s > + > + > +OPTIONS for 'perf irq' > +---------------------------- > + > +--cpus:: > + Show just entries with activities for the given CPUs. I am getting this: tools/perf/perf irq --cpus=0 record -- find / Error: unknown option `cpus=0' Usage: perf irq [<options>] {record|timeconsume|script} Regards, Alexei
