ee29be625b
Since we already ask for PERF_SAMPLE_ID and use it to quickly find the
associated evsel, add handler func + data to struct perf_evsel to avoid
using chains of if(strcmp(event_name)) and also to avoid all the linear
list searches via trace_event_find.
To demonstrate the technique convert 'perf sched' to it:
# perf sched record sleep 5m
And then:
Performance counter stats for '/tmp/oldperf sched lat':
646.929438 task-clock # 0.999 CPUs utilized
9 context-switches # 0.000 M/sec
0 CPU-migrations # 0.000 M/sec
20,901 page-faults # 0.032 M/sec
1,290,144,450 cycles # 1.994 GHz
<not supported> stalled-cycles-frontend
<not supported> stalled-cycles-backend
1,606,158,439 instructions # 1.24 insns per cycle
339,088,395 branches # 524.151 M/sec
4,550,735 branch-misses # 1.34% of all branches
0.647524759 seconds time elapsed
Versus:
Performance counter stats for 'perf sched lat':
473.564691 task-clock # 0.999 CPUs utilized
9 context-switches # 0.000 M/sec
0 CPU-migrations # 0.000 M/sec
20,903 page-faults # 0.044 M/sec
944,367,984 cycles # 1.994 GHz
<not supported> stalled-cycles-frontend
<not supported> stalled-cycles-backend
1,442,385,571 instructions # 1.53 insns per cycle
308,383,106 branches # 651.195 M/sec
4,481,784 branch-misses # 1.45% of all branches
0.474215751 seconds time elapsed
[root@emilia ~]#
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-1kbzpl74lwi6lavpqke2u2p3@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
123 lines
3.9 KiB
C
123 lines
3.9 KiB
C
#ifndef __PERF_EVLIST_H
|
|
#define __PERF_EVLIST_H 1
|
|
|
|
#include <linux/list.h>
|
|
#include <stdio.h>
|
|
#include "../perf.h"
|
|
#include "event.h"
|
|
#include "util.h"
|
|
#include <unistd.h>
|
|
|
|
struct pollfd;
|
|
struct thread_map;
|
|
struct cpu_map;
|
|
struct perf_record_opts;
|
|
|
|
#define PERF_EVLIST__HLIST_BITS 8
|
|
#define PERF_EVLIST__HLIST_SIZE (1 << PERF_EVLIST__HLIST_BITS)
|
|
|
|
struct perf_evlist {
|
|
struct list_head entries;
|
|
struct hlist_head heads[PERF_EVLIST__HLIST_SIZE];
|
|
int nr_entries;
|
|
int nr_fds;
|
|
int nr_mmaps;
|
|
int mmap_len;
|
|
struct {
|
|
int cork_fd;
|
|
pid_t pid;
|
|
} workload;
|
|
bool overwrite;
|
|
union perf_event event_copy;
|
|
struct perf_mmap *mmap;
|
|
struct pollfd *pollfd;
|
|
struct thread_map *threads;
|
|
struct cpu_map *cpus;
|
|
struct perf_evsel *selected;
|
|
};
|
|
|
|
struct perf_evsel_str_handler {
|
|
const char *name;
|
|
void *handler;
|
|
};
|
|
|
|
struct perf_evsel;
|
|
|
|
struct perf_evlist *perf_evlist__new(struct cpu_map *cpus,
|
|
struct thread_map *threads);
|
|
void perf_evlist__init(struct perf_evlist *evlist, struct cpu_map *cpus,
|
|
struct thread_map *threads);
|
|
void perf_evlist__exit(struct perf_evlist *evlist);
|
|
void perf_evlist__delete(struct perf_evlist *evlist);
|
|
|
|
void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry);
|
|
int perf_evlist__add_default(struct perf_evlist *evlist);
|
|
int perf_evlist__add_attrs(struct perf_evlist *evlist,
|
|
struct perf_event_attr *attrs, size_t nr_attrs);
|
|
int perf_evlist__add_tracepoints(struct perf_evlist *evlist,
|
|
const char *tracepoints[], size_t nr_tracepoints);
|
|
int perf_evlist__set_tracepoints_handlers(struct perf_evlist *evlist,
|
|
const struct perf_evsel_str_handler *assocs,
|
|
size_t nr_assocs);
|
|
|
|
#define perf_evlist__add_attrs_array(evlist, array) \
|
|
perf_evlist__add_attrs(evlist, array, ARRAY_SIZE(array))
|
|
|
|
#define perf_evlist__add_tracepoints_array(evlist, array) \
|
|
perf_evlist__add_tracepoints(evlist, array, ARRAY_SIZE(array))
|
|
|
|
#define perf_evlist__set_tracepoints_handlers_array(evlist, array) \
|
|
perf_evlist__set_tracepoints_handlers(evlist, array, ARRAY_SIZE(array))
|
|
|
|
void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel,
|
|
int cpu, int thread, u64 id);
|
|
|
|
int perf_evlist__alloc_pollfd(struct perf_evlist *evlist);
|
|
void perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd);
|
|
|
|
struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id);
|
|
|
|
union perf_event *perf_evlist__mmap_read(struct perf_evlist *self, int idx);
|
|
|
|
int perf_evlist__open(struct perf_evlist *evlist, bool group);
|
|
|
|
void perf_evlist__config_attrs(struct perf_evlist *evlist,
|
|
struct perf_record_opts *opts);
|
|
|
|
int perf_evlist__prepare_workload(struct perf_evlist *evlist,
|
|
struct perf_record_opts *opts,
|
|
const char *argv[]);
|
|
int perf_evlist__start_workload(struct perf_evlist *evlist);
|
|
|
|
int perf_evlist__alloc_mmap(struct perf_evlist *evlist);
|
|
int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages,
|
|
bool overwrite);
|
|
void perf_evlist__munmap(struct perf_evlist *evlist);
|
|
|
|
void perf_evlist__disable(struct perf_evlist *evlist);
|
|
void perf_evlist__enable(struct perf_evlist *evlist);
|
|
|
|
void perf_evlist__set_selected(struct perf_evlist *evlist,
|
|
struct perf_evsel *evsel);
|
|
|
|
static inline void perf_evlist__set_maps(struct perf_evlist *evlist,
|
|
struct cpu_map *cpus,
|
|
struct thread_map *threads)
|
|
{
|
|
evlist->cpus = cpus;
|
|
evlist->threads = threads;
|
|
}
|
|
|
|
int perf_evlist__create_maps(struct perf_evlist *evlist, pid_t target_pid,
|
|
pid_t target_tid, const char *cpu_list);
|
|
void perf_evlist__delete_maps(struct perf_evlist *evlist);
|
|
int perf_evlist__set_filters(struct perf_evlist *evlist);
|
|
|
|
u64 perf_evlist__sample_type(const struct perf_evlist *evlist);
|
|
bool perf_evlist__sample_id_all(const const struct perf_evlist *evlist);
|
|
u16 perf_evlist__id_hdr_size(const struct perf_evlist *evlist);
|
|
|
|
bool perf_evlist__valid_sample_type(const struct perf_evlist *evlist);
|
|
bool perf_evlist__valid_sample_id_all(const struct perf_evlist *evlist);
|
|
#endif /* __PERF_EVLIST_H */
|