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perf dlfilter: Add machine_pid and vcpu

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Add machine_pid and vcpu to struct perf_dlfilter_sample. The 'size' can be
used to determine if the values are present, however machine_pid is zero if
unused in any case. vcpu should be ignored if machine_pid is zero.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: kvm@vger.kernel.org
Link: https://lore.kernel.org/r/20220711093218.10967-17-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2022-07-11 12:31:59 +03:00 committed by Arnaldo Carvalho de Melo
parent e28fb159f1
commit 2273e46b98
3 changed files with 32 additions and 0 deletions
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22
tools/perf/Documentation/perf-dlfilter.txt
View File

@ -107,9 +107,31 @@ struct perf_dlfilter_sample {
__u64 raw_callchain_nr; /* Number of raw_callchain entries */
const __u64 *raw_callchain; /* Refer <linux/perf_event.h> */
const char *event;
__s32 machine_pid;
__s32 vcpu;
};
----
Note: 'machine_pid' and 'vcpu' are not original members, but were added together later.
'size' can be used to determine their presence at run time.
PERF_DLFILTER_HAS_MACHINE_PID will be defined if they are present at compile time.
For example:
[source,c]
----
#include <perf/perf_dlfilter.h>
#include <stddef.h>
#include <stdbool.h>
static inline bool have_machine_pid(const struct perf_dlfilter_sample *sample)
{
#ifdef PERF_DLFILTER_HAS_MACHINE_PID
return sample->size >= offsetof(struct perf_dlfilter_sample, vcpu) + sizeof(sample->vcpu);
#else
return false;
#endif
}
----
The perf_dlfilter_fns structure
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

8
tools/perf/include/perf/perf_dlfilter.h
View File

@ -9,6 +9,12 @@
#include <linux/perf_event.h>
#include <linux/types.h>
/*
* The following macro can be used to determine if this header defines
* perf_dlfilter_sample machine_pid and vcpu.
*/
#define PERF_DLFILTER_HAS_MACHINE_PID
/* Definitions for perf_dlfilter_sample flags */
enum {
PERF_DLFILTER_FLAG_BRANCH = 1ULL << 0,
@ -62,6 +68,8 @@ struct perf_dlfilter_sample {
__u64 raw_callchain_nr; /* Number of raw_callchain entries */
const __u64 *raw_callchain; /* Refer <linux/perf_event.h> */
const char *event;
__s32 machine_pid;
__s32 vcpu;
};
/*

2
tools/perf/util/dlfilter.c
View File

@ -495,6 +495,8 @@ int dlfilter__do_filter_event(struct dlfilter *d,
ASSIGN(misc);
ASSIGN(raw_size);
ASSIGN(raw_data);
ASSIGN(machine_pid);
ASSIGN(vcpu);
if (sample->branch_stack) {
d_sample.brstack_nr = sample->branch_stack->nr;