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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
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2 changed files with 19 additions and 1 deletions
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@ -8,6 +8,7 @@
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#include <sys/syscall.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdbool.h>
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#include <sys/ioctl.h>
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#include "event.h"
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@ -20,7 +21,8 @@ int perf_event_open(struct perf_event_attr *attr, pid_t pid, int cpu,
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group_fd, flags);
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}
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void event_init_opts(struct event *e, u64 config, int type, char *name)
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static void __event_init_opts(struct event *e, u64 config,
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int type, char *name, bool sampling)
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{
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memset(e, 0, sizeof(*e));
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@ -32,6 +34,16 @@ void event_init_opts(struct event *e, u64 config, int type, char *name)
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/* This has to match the structure layout in the header */
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e->attr.read_format = PERF_FORMAT_TOTAL_TIME_ENABLED | \
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PERF_FORMAT_TOTAL_TIME_RUNNING;
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if (sampling) {
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e->attr.sample_period = 1000;
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e->attr.sample_type = PERF_SAMPLE_REGS_INTR;
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e->attr.disabled = 1;
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}
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}
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void event_init_opts(struct event *e, u64 config, int type, char *name)
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{
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__event_init_opts(e, config, type, name, false);
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}
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void event_init_named(struct event *e, u64 config, char *name)
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@ -44,6 +56,11 @@ void event_init(struct event *e, u64 config)
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event_init_opts(e, config, PERF_TYPE_RAW, "event");
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}
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void event_init_sampling(struct event *e, u64 config)
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{
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__event_init_opts(e, config, PERF_TYPE_RAW, "event", true);
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}
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#define PERF_CURRENT_PID 0
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#define PERF_NO_PID -1
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#define PERF_NO_CPU -1
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@ -32,6 +32,7 @@ struct event {
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void event_init(struct event *e, u64 config);
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void event_init_named(struct event *e, u64 config, char *name);
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void event_init_opts(struct event *e, u64 config, int type, char *name);
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void event_init_sampling(struct event *e, u64 config);
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int event_open_with_options(struct event *e, pid_t pid, int cpu, int group_fd);
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int event_open_with_group(struct event *e, int group_fd);
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int event_open_with_pid(struct event *e, pid_t pid);
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