Hi Paul Mackerass, Would you be willing to review/comment on Vince's patch, please. Cheers, Michael On 02/11/2015 08:04 PM, Vince Weaver wrote: > > This manpage patch relates to the exclude_hv bit added to the kernel > in the following commit: > > exclude_hv; Linux 2.6.31 > commit 0475f9ea8e2cc030298908949e0d5da9f2fc2cfe > Author: Paul Mackerras <paulus@xxxxxxxxx> > > perf_counters: allow users to count user, kernel and/or hypervisor events > > Signed-off-by: Paul Mackerras <paulus@xxxxxxxxx> > > The updated manpage text points out that the exclude_hv > "exclude hypervisor" bit only applies on hardware that > supports this feature (such as PowerPC) > and is silently ignored on other platforms such as x86. > > 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..665aa31 100644 > --- a/man2/perf_event_open.2 > +++ b/man2/perf_event_open.2 > @@ -856,10 +856,9 @@ If this bit is set, the count excludes events that happen in kernel-space. > .IR "exclude_hv" > If this bit is set, the count excludes events that happen in the > hypervisor. > -This is mainly for PMUs that have built-in support for handling this > -(such as POWER). > -Extra support is needed for handling hypervisor measurements on most > -machines. > +This is mainly for PMUs that have built-in hardware support > +for this feature (such as POWER; this setting is silently > +ignored on x86). > .TP > .IR "exclude_idle" > If set, don't count when the CPU is idle. > -- 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
