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selftests: Add test of PMU instruction counting on powerpc

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This commit adds a test of instruction counting using the PMU on powerpc.

Although the bulk of the code is architecture agnostic, the code needs to
run a precisely sized loop which is implemented in assembler.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Michael Ellerman
2013-08-06 17:42:37 +10:00
committed by Benjamin Herrenschmidt
parent 2fae0d7ced
commit cb96143def
6 changed files with 349 additions and 1 deletions
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39
tools/testing/selftests/powerpc/pmu/event.h Normal file
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/*
* Copyright 2013, Michael Ellerman, IBM Corp.
* Licensed under GPLv2.
*/
#ifndef _SELFTESTS_POWERPC_PMU_EVENT_H
#define _SELFTESTS_POWERPC_PMU_EVENT_H
#include <unistd.h>
#include <linux/perf_event.h>
#include "utils.h"
struct event {
struct perf_event_attr attr;
char *name;
int fd;
/* This must match the read_format we use */
struct {
u64 value;
u64 running;
u64 enabled;
} result;
};
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);
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(struct event *e);
void event_close(struct event *e);
int event_reset(struct event *e);
int event_read(struct event *e);
void event_report_justified(struct event *e, int name_width, int result_width);
void event_report(struct event *e);
#endif /* _SELFTESTS_POWERPC_PMU_EVENT_H */