lkml.org 
[lkml]   [2011]   [Jun]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    SubjectRe: [PATCH 0/4] perf: Intel uncore pmu counting support
    From
    On Thu, Jun 30, 2011 at 10:09 AM, Lin Ming <ming.m.lin@intel.com> wrote:
    > Hi, all
    >
    > I posted uncore patches months ago, but it was pended due to an uncore
    > interrupt problem.
    >
    > This series are cut to support uncore pmu counting only.
    > So uncore interrupt handling is not needed.
    >
    You're making the assumption that when counting, you can never construct
    a measurement that will cause a counter to overflow the 39 bits. If not, then
    you need interrupt handling even when counting.


    > The uncore pmu type is allocated dynamically and exported via sysfs.
    > $ cat /sys/bus/event_source/devices/uncore/type
    > 6
    >
    > You can count uncore raw events as below,
    > $ perf stat -e uncore:r0101 ls
    >
    > It reads uncore pmu type id from sysfs to setup perf_event_attr::type.
    >
    > Comments are appreciated.
    >
    > Thanks,
    > Lin Ming
    >
    >


    \
     
     \ /
      Last update: 2011-06-30 14:13    [W:4.469 / U:0.092 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site