Hi Joerg, Would you be willing to review/comment on Vince's patch, please. Cheers, Michael On 02/11/2015 08:06 PM, Vince Weaver wrote: > > This patch relates to the exclude_host and exclude_guest bits added > by the following commit: > > exclude_host, exclude_guest; Linux 3.2 > commit a240f76165e6255384d4bdb8139895fac7988799 > Author: Joerg Roedel <joerg.roedel@xxxxxxx> > Date: Wed Oct 5 14:01:16 2011 +0200 > > perf, core: Introduce attrs to count in either host or guest mode > > Signed-off-by: Joerg Roedel <joerg.roedel@xxxxxxx> > Signed-off-by: Gleb Natapov <gleb@xxxxxxxxxx> > Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> > Link: http://lkml.kernel.org/r/1317816084-18026-2-git-send-email-gleb@xxxxxxxxxx > Signed-off-by: Ingo Molnar <mingo@xxxxxxx> > > The updated manpage text clarifies that the "exclude_host" and > "exclude_guest" perf_event_open() attr bits only apply in the > context of a KVM environment and are currently x86 only. > > This is a resend of the patch; the previous time I sent it > (http://thread.gmane.org/gmane.linux.man/7500) it did not > receive any comments. > > Signed-off-by: Vince Weaver <vincent.weaver@xxxxxxxxx> > > diff --git a/man2/perf_event_open.2 b/man2/perf_event_open.2 > index 39c8d8c..1ea56c9 100644 > --- a/man2/perf_event_open.2 > +++ b/man2/perf_event_open.2 > @@ -1006,11 +1006,25 @@ struct sample_id { > .TP > .IR "exclude_host" " (since Linux 3.2)" > .\" commit a240f76165e6255384d4bdb8139895fac7988799 > -Do not measure time spent in VM host. > +When conducting measurements that include processes running > +VM instances (i.e. have executed a > +.I KVM_RUN > +.BR ioctl (2) > +) only measure events happening inside a guest instance. > +This is only meaningful outside the guests; this setting does > +not change counts gathered inside of a guest. > +Currently this functionality is x86 only. > .TP > .IR "exclude_guest" " (since Linux 3.2)" > .\" commit a240f76165e6255384d4bdb8139895fac7988799 > -Do not measure time spent in VM guest. > +When conducting measurements that include processes running > +VM instances (i.e. have executed a > +.I KVM_RUN > +.BR ioctl (2) > +) do not measure events happening inside guest instances. > +This is only meaningful outside the guests; this setting does > +not change counts gathered inside of a guest. > +Currently this functionality is x86 only. > .TP > .IR "exclude_callchain_kernel" " (since Linux 3.7)" > .\" commit d077526485d5c9b12fe85d0b2b3b7041e6bc5f91 > -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/ -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
