Messages in this thread | | | Date | Fri, 24 Apr 2015 07:49:48 -0600 | From | David Ahern <> | Subject | Re: [Question] How does perf still record the stack of a specified pid even when that process is interrupted and CPU is scheduled to other process |
| |
On 4/24/15 7:31 AM, Yunlong Song wrote: > [Profiling Problem] > > Although perf can record the events (with call stack) of a specified pid, e.g. using > "perf record -g iozone -s 262144 -r 64 -i 0 -i 2". But we find iozone is interrupted
That command tells perf to *only* collect data for iozone. This command:
perf record -g -a -- iozone ....
tells perf to collect samples system wide as long as the iozone process is alive.
| |