[01/10] perf/core: Add macro to test for event exclusion flags
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Message ID 1542363853-13849-2-git-send-email-andrew.murray@arm.com
State Not Applicable
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  • perf/core: Generalise event exclusion checking
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Commit Message

Andrew Murray Nov. 16, 2018, 10:24 a.m. UTC
Add a macro that tests if any of the perf event exclusion flags
are set on a given event.

Signed-off-by: Andrew Murray <andrew.murray@arm.com>
---
 include/linux/perf_event.h | 9 +++++++++
 1 file changed, 9 insertions(+)

Comments

Peter Zijlstra Nov. 19, 2018, 12:58 p.m. UTC | #1
On Fri, Nov 16, 2018 at 10:24:04AM +0000, Andrew Murray wrote:
> Add a macro that tests if any of the perf event exclusion flags
> are set on a given event.

It is in fact an inline function, not a CPP macro.

> Signed-off-by: Andrew Murray <andrew.murray@arm.com>
> ---
>  include/linux/perf_event.h | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
> index 53c500f..89ee7fa 100644
> --- a/include/linux/perf_event.h
> +++ b/include/linux/perf_event.h
> @@ -1004,6 +1004,15 @@ perf_event__output_id_sample(struct perf_event *event,
>  extern void
>  perf_log_lost_samples(struct perf_event *event, u64 lost);
>  
> +static inline bool event_has_exclude_flags(struct perf_event *event)
> +{
> +	struct perf_event_attr *attr = &event->attr;
> +
> +	return attr->exclude_idle || attr->exclude_user ||
> +	       attr->exclude_kernel || attr->exclude_hv ||
> +	       attr->exclude_guest || attr->exclude_host;
> +}
> +
>  static inline bool is_sampling_event(struct perf_event *event)
>  {
>  	return event->attr.sample_period != 0;
> -- 
> 2.7.4
>
Mark Rutland Nov. 19, 2018, 4:01 p.m. UTC | #2
On Fri, Nov 16, 2018 at 10:24:04AM +0000, Andrew Murray wrote:
> Add a macro that tests if any of the perf event exclusion flags
> are set on a given event.
> 
> Signed-off-by: Andrew Murray <andrew.murray@arm.com>

Aside from the s/macro/function, or s/macro/helper/, this looks sound to
me.

Assuming you fix that up here and in subsequent commit messages, for
this patch feel free to add:

Acked-by: Mark Rutland <mark.rutland@arm.com>

Mark.

> ---
>  include/linux/perf_event.h | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
> index 53c500f..89ee7fa 100644
> --- a/include/linux/perf_event.h
> +++ b/include/linux/perf_event.h
> @@ -1004,6 +1004,15 @@ perf_event__output_id_sample(struct perf_event *event,
>  extern void
>  perf_log_lost_samples(struct perf_event *event, u64 lost);
>  
> +static inline bool event_has_exclude_flags(struct perf_event *event)
> +{
> +	struct perf_event_attr *attr = &event->attr;
> +
> +	return attr->exclude_idle || attr->exclude_user ||
> +	       attr->exclude_kernel || attr->exclude_hv ||
> +	       attr->exclude_guest || attr->exclude_host;
> +}
> +
>  static inline bool is_sampling_event(struct perf_event *event)
>  {
>  	return event->attr.sample_period != 0;
> -- 
> 2.7.4
>
Michael Ellerman Nov. 20, 2018, 11:28 a.m. UTC | #3
Andrew Murray <andrew.murray@arm.com> writes:

> Add a macro that tests if any of the perf event exclusion flags
> are set on a given event.
>
> Signed-off-by: Andrew Murray <andrew.murray@arm.com>
> ---
>  include/linux/perf_event.h | 9 +++++++++
>  1 file changed, 9 insertions(+)
>
> diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
> index 53c500f..89ee7fa 100644
> --- a/include/linux/perf_event.h
> +++ b/include/linux/perf_event.h
> @@ -1004,6 +1004,15 @@ perf_event__output_id_sample(struct perf_event *event,
>  extern void
>  perf_log_lost_samples(struct perf_event *event, u64 lost);
>  
> +static inline bool event_has_exclude_flags(struct perf_event *event)
> +{
> +	struct perf_event_attr *attr = &event->attr;
> +
> +	return attr->exclude_idle || attr->exclude_user ||
> +	       attr->exclude_kernel || attr->exclude_hv ||
> +	       attr->exclude_guest || attr->exclude_host;
> +}

Sorry to be a total PITA, but using "flags" plural suggests that it only
returns true if there is more than one exclude flag set.

A better name would be event_has_exclude_flag() or maybe
event_has_any_exclude_flag().

If you're doing a respin anyway it'd be nice to fix the name, but
obviously it's not high priority.

cheers
Andrew Murray Nov. 23, 2018, 2:32 p.m. UTC | #4
On Tue, Nov 20, 2018 at 10:28:34PM +1100, Michael Ellerman wrote:
> Andrew Murray <andrew.murray@arm.com> writes:
> 
> > Add a macro that tests if any of the perf event exclusion flags
> > are set on a given event.
> >
> > Signed-off-by: Andrew Murray <andrew.murray@arm.com>
> > ---
> >  include/linux/perf_event.h | 9 +++++++++
> >  1 file changed, 9 insertions(+)
> >
> > diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
> > index 53c500f..89ee7fa 100644
> > --- a/include/linux/perf_event.h
> > +++ b/include/linux/perf_event.h
> > @@ -1004,6 +1004,15 @@ perf_event__output_id_sample(struct perf_event *event,
> >  extern void
> >  perf_log_lost_samples(struct perf_event *event, u64 lost);
> >  
> > +static inline bool event_has_exclude_flags(struct perf_event *event)
> > +{
> > +	struct perf_event_attr *attr = &event->attr;
> > +
> > +	return attr->exclude_idle || attr->exclude_user ||
> > +	       attr->exclude_kernel || attr->exclude_hv ||
> > +	       attr->exclude_guest || attr->exclude_host;
> > +}
> 
> Sorry to be a total PITA, but using "flags" plural suggests that it only
> returns true if there is more than one exclude flag set.
> 
> A better name would be event_has_exclude_flag() or maybe
> event_has_any_exclude_flag().
> 
> If you're doing a respin anyway it'd be nice to fix the name, but
> obviously it's not high priority.

No problem - I'll go with event_has_any_exclude_flag.

Thanks,

Andrew Murray

> 
> cheers

Patch
diff mbox series

diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 53c500f..89ee7fa 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -1004,6 +1004,15 @@  perf_event__output_id_sample(struct perf_event *event,
 extern void
 perf_log_lost_samples(struct perf_event *event, u64 lost);
 
+static inline bool event_has_exclude_flags(struct perf_event *event)
+{
+	struct perf_event_attr *attr = &event->attr;
+
+	return attr->exclude_idle || attr->exclude_user ||
+	       attr->exclude_kernel || attr->exclude_hv ||
+	       attr->exclude_guest || attr->exclude_host;
+}
+
 static inline bool is_sampling_event(struct perf_event *event)
 {
 	return event->attr.sample_period != 0;