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selftests/powerpc/pmu: Add event_init_sampling function 

Extended event_init_opts() to include initialization of sampling
testcases. Patch adds an event_init_sampling() wrapper to initialize
event attribute fields for sampling events. This includes initializing
sample period, sample type and event type.

Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220127072012.662451-6-kjain@linux.ibm.com
This commit is contained in:
Madhavan Srinivasan 2022-01-27 12:49:57 +05:30 committed by Michael Ellerman
parent 5f6c3061af
commit 54d4ba7f22
2 changed files with 19 additions and 1 deletions
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19
tools/testing/selftests/powerpc/pmu/event.c
View File

@ -8,6 +8,7 @@
#include <sys/syscall.h>
#include <string.h>
#include <stdio.h>
#include <stdbool.h>
#include <sys/ioctl.h>
#include "event.h"
@ -20,7 +21,8 @@ int perf_event_open(struct perf_event_attr *attr, pid_t pid, int cpu,
group_fd, flags);
}
void event_init_opts(struct event *e, u64 config, int type, char *name)
static void __event_init_opts(struct event *e, u64 config,
int type, char *name, bool sampling)
{
memset(e, 0, sizeof(*e));
@ -32,6 +34,16 @@ void event_init_opts(struct event *e, u64 config, int type, char *name)
/* This has to match the structure layout in the header */
e->attr.read_format = PERF_FORMAT_TOTAL_TIME_ENABLED | \
PERF_FORMAT_TOTAL_TIME_RUNNING;
if (sampling) {
e->attr.sample_period = 1000;
e->attr.sample_type = PERF_SAMPLE_REGS_INTR;
e->attr.disabled = 1;
}
}
void event_init_opts(struct event *e, u64 config, int type, char *name)
{
__event_init_opts(e, config, type, name, false);
}
void event_init_named(struct event *e, u64 config, char *name)
@ -44,6 +56,11 @@ void event_init(struct event *e, u64 config)
event_init_opts(e, config, PERF_TYPE_RAW, "event");
}
void event_init_sampling(struct event *e, u64 config)
{
__event_init_opts(e, config, PERF_TYPE_RAW, "event", true);
}
#define PERF_CURRENT_PID 0
#define PERF_NO_PID -1
#define PERF_NO_CPU -1

1
tools/testing/selftests/powerpc/pmu/event.h
View File

@ -32,6 +32,7 @@ struct event {
void event_init(struct event *e, u64 config);
void event_init_named(struct event *e, u64 config, char *name);
void event_init_opts(struct event *e, u64 config, int type, char *name);
void event_init_sampling(struct event *e, u64 config);
int event_open_with_options(struct event *e, pid_t pid, int cpu, int group_fd);
int event_open_with_group(struct event *e, int group_fd);
int event_open_with_pid(struct event *e, pid_t pid);