Re: [patch] perf_event_open.2: Exclude_hv clarification
Hello Paul, Ping! Cheers, Michael On 02/17/2015 06:32 AM, Michael Kerrisk (man-pages) wrote: > 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 >> >> perf_counters: allow users to count user, kernel and/or >> hypervisor events >> >> Signed-off-by: Paul Mackerras >> >> 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 >> >> 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-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [patch] perf_event_open.2: Exclude_hv clarification
Hello Paul, Ping! Cheers, Michael On 02/17/2015 06:32 AM, Michael Kerrisk (man-pages) wrote: 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 pau...@samba.org perf_counters: allow users to count user, kernel and/or hypervisor events Signed-off-by: Paul Mackerras pau...@samba.org 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.wea...@maine.edu 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-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [patch] perf_event_open.2: Exclude_hv clarification
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 > > perf_counters: allow users to count user, kernel and/or > hypervisor events > > Signed-off-by: Paul Mackerras > > 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 > > 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-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [patch] perf_event_open.2: Exclude_hv clarification
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 pau...@samba.org perf_counters: allow users to count user, kernel and/or hypervisor events Signed-off-by: Paul Mackerras pau...@samba.org 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.wea...@maine.edu 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-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
