Messages in this thread | | | Date | Wed, 09 Feb 2011 11:28:33 -0600 | From | Chris Friesen <> | Subject | Re: RFC: /proc/<pid>/sched should contain cumulative data for all threads in process |
| |
On 02/08/2011 07:45 AM, Peter Zijlstra wrote: > On Tue, 2011-02-08 at 13:11 +0100, Ingo Molnar wrote:
>> So assuming a tool would want to capture such stats of the system, what would be its >> options? Could we do all this via system-wide counters and perf stat alike cheap, >> transparent gathering without having to patch/rebuild the kernel? > > Very much depends on what is wanted, but most of the stuff inside those > files is very specific to the implementation and pinning any of that to > an ABI is like silly.
Currently we're using the following fields from /proc/<pid>/task/<tid>/sched:
sum_exec_runtime wait_sum wait_max exec_max iowait_sum iowait_count nr_switches
If there's a better way to get this information (with the precision available from this interface) then I'd love to hear about it.
Chris
-- Chris Friesen Software Developer GENBAND chris.friesen@genband.com www.genband.com
| |