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perf evsel: Cache associated event_format

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We already lookup the associated event_format when reading the perf.data
header, so that we can cache the tracepoint name in evsel->name, so do
it a little further and save the event_format itself, so that we can
avoid relookups in tools that need to access it.

Change the tools to take the most obvious advantage, when they were
using pevent_find_event directly. More work is needed for further
removing the need of a pointer to pevent, such as when asking for event
field values ("common_pid" and the other common fields and per
event_format fields).

This is something that was planned but only got actually done when
Andrey Wagin needed to do this lookup at perf_tool->sample() time, when
we don't have access to pevent (session->pevent) to use with
pevent_find_event().

Cc: Andrey Wagin <avagin@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Link: http://lkml.kernel.org/n/tip-txkvew2ckko0b594ae8fbnyk@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2012-08-07 09:58:03 -03:00
parent 8b6ee4c5d4
commit fcf65bf149
10 changed files with 70 additions and 114 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

39
tools/perf/builtin-kmem.c
View file

@ -1,6 +1,7 @@
#include "builtin.h" #include "builtin.h"
#include "perf.h" #include "perf.h"
#include "util/evsel.h"
#include "util/util.h" #include "util/util.h"
#include "util/cache.h" #include "util/cache.h"
#include "util/symbol.h" #include "util/symbol.h"
@ -57,11 +58,6 @@ static unsigned long nr_allocs, nr_cross_allocs;
#define PATH_SYS_NODE "/sys/devices/system/node" #define PATH_SYS_NODE "/sys/devices/system/node"
struct perf_kmem {
struct perf_tool tool;
struct perf_session *session;
};
static void init_cpunode_map(void) static void init_cpunode_map(void)
{ {
FILE *fp; FILE *fp;
@ -283,16 +279,10 @@ static void process_free_event(void *data,
s_alloc->alloc_cpu = -1; s_alloc->alloc_cpu = -1;
} }
static void process_raw_event(struct perf_tool *tool, static void process_raw_event(struct perf_evsel *evsel, void *data,
union perf_event *raw_event __used, void *data,
int cpu, u64 timestamp, struct thread *thread) int cpu, u64 timestamp, struct thread *thread)
{ {
struct perf_kmem *kmem = container_of(tool, struct perf_kmem, tool); struct event_format *event = evsel->tp_format;
struct event_format *event;
int type;
type = trace_parse_common_type(kmem->session->pevent, data);
event = pevent_find_event(kmem->session->pevent, type);
if (!strcmp(event->name, "kmalloc") || if (!strcmp(event->name, "kmalloc") ||
!strcmp(event->name, "kmem_cache_alloc")) { !strcmp(event->name, "kmem_cache_alloc")) {
@ -313,10 +303,10 @@ static void process_raw_event(struct perf_tool *tool,
} }
} }
static int process_sample_event(struct perf_tool *tool, static int process_sample_event(struct perf_tool *tool __used,
union perf_event *event, union perf_event *event,
struct perf_sample *sample, struct perf_sample *sample,
struct perf_evsel *evsel __used, struct perf_evsel *evsel,
struct machine *machine) struct machine *machine)
{ {
struct thread *thread = machine__findnew_thread(machine, event->ip.pid); struct thread *thread = machine__findnew_thread(machine, event->ip.pid);
@ -329,18 +319,16 @@ static int process_sample_event(struct perf_tool *tool,
dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid); dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
process_raw_event(tool, event, sample->raw_data, sample->cpu, process_raw_event(evsel, sample->raw_data, sample->cpu,
sample->time, thread); sample->time, thread);
return 0; return 0;
} }
static struct perf_kmem perf_kmem = { static struct perf_tool perf_kmem = {
.tool = { .sample = process_sample_event,
.sample = process_sample_event, .comm = perf_event__process_comm,
.comm = perf_event__process_comm, .ordered_samples = true,
.ordered_samples = true,
},
}; };
static double fragmentation(unsigned long n_req, unsigned long n_alloc) static double fragmentation(unsigned long n_req, unsigned long n_alloc)
@ -497,13 +485,10 @@ static int __cmd_kmem(void)
int err = -EINVAL; int err = -EINVAL;
struct perf_session *session; struct perf_session *session;
session = perf_session__new(input_name, O_RDONLY, 0, false, session = perf_session__new(input_name, O_RDONLY, 0, false, &perf_kmem);
&perf_kmem.tool);
if (session == NULL) if (session == NULL)
return -ENOMEM; return -ENOMEM;
perf_kmem.session = session;
if (perf_session__create_kernel_maps(session) < 0) if (perf_session__create_kernel_maps(session) < 0)
goto out_delete; goto out_delete;
@ -511,7 +496,7 @@ static int __cmd_kmem(void)
goto out_delete; goto out_delete;
setup_pager(); setup_pager();
err = perf_session__process_events(session, &perf_kmem.tool); err = perf_session__process_events(session, &perf_kmem);
if (err != 0) if (err != 0)
goto out_delete; goto out_delete;
sort_result(); sort_result();

15
tools/perf/builtin-lock.c
View file

@ -1,6 +1,7 @@
#include "builtin.h" #include "builtin.h"
#include "perf.h" #include "perf.h"
#include "util/evsel.h"
#include "util/util.h" #include "util/util.h"
#include "util/cache.h" #include "util/cache.h"
#include "util/symbol.h" #include "util/symbol.h"
@ -718,14 +719,10 @@ process_lock_release_event(void *data,
trace_handler->release_event(&release_event, event, cpu, timestamp, thread); trace_handler->release_event(&release_event, event, cpu, timestamp, thread);
} }
static void static void process_raw_event(struct perf_evsel *evsel, void *data, int cpu,
process_raw_event(void *data, int cpu, u64 timestamp, struct thread *thread) u64 timestamp, struct thread *thread)
{ {
struct event_format *event; struct event_format *event = evsel->tp_format;
int type;
type = trace_parse_common_type(session->pevent, data);
event = pevent_find_event(session->pevent, type);
if (!strcmp(event->name, "lock_acquire")) if (!strcmp(event->name, "lock_acquire"))
process_lock_acquire_event(data, event, cpu, timestamp, thread); process_lock_acquire_event(data, event, cpu, timestamp, thread);
@ -849,7 +846,7 @@ static void dump_info(void)
static int process_sample_event(struct perf_tool *tool __used, static int process_sample_event(struct perf_tool *tool __used,
union perf_event *event, union perf_event *event,
struct perf_sample *sample, struct perf_sample *sample,
struct perf_evsel *evsel __used, struct perf_evsel *evsel,
struct machine *machine) struct machine *machine)
{ {
struct thread *thread = machine__findnew_thread(machine, sample->tid); struct thread *thread = machine__findnew_thread(machine, sample->tid);
@ -860,7 +857,7 @@ static int process_sample_event(struct perf_tool *tool __used,
return -1; return -1;
} }
process_raw_event(sample->raw_data, sample->cpu, sample->time, thread); process_raw_event(evsel, sample->raw_data, sample->cpu, sample->time, thread);
return 0; return 0;
} }

37
tools/perf/builtin-sched.c
View file

@ -43,11 +43,6 @@ static u64 sleep_measurement_overhead;
static unsigned long nr_tasks; static unsigned long nr_tasks;
struct perf_sched {
struct perf_tool tool;
struct perf_session *session;
};
struct sched_atom; struct sched_atom;
struct task_desc { struct task_desc {
@ -1596,14 +1591,12 @@ typedef void (*tracepoint_handler)(struct perf_tool *tool, struct event_format *
struct machine *machine, struct machine *machine,
struct thread *thread); struct thread *thread);
static int perf_sched__process_tracepoint_sample(struct perf_tool *tool, static int perf_sched__process_tracepoint_sample(struct perf_tool *tool __used,
union perf_event *event __used, union perf_event *event __used,
struct perf_sample *sample, struct perf_sample *sample,
struct perf_evsel *evsel, struct perf_evsel *evsel,
struct machine *machine) struct machine *machine)
{ {
struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
struct pevent *pevent = sched->session->pevent;
struct thread *thread = machine__findnew_thread(machine, sample->pid); struct thread *thread = machine__findnew_thread(machine, sample->pid);
if (thread == NULL) { if (thread == NULL) {
@ -1617,25 +1610,18 @@ static int perf_sched__process_tracepoint_sample(struct perf_tool *tool,
if (evsel->handler.func != NULL) { if (evsel->handler.func != NULL) {
tracepoint_handler f = evsel->handler.func; tracepoint_handler f = evsel->handler.func;
f(tool, evsel->tp_format, sample, machine, thread);
if (evsel->handler.data == NULL)
evsel->handler.data = pevent_find_event(pevent,
evsel->attr.config);
f(tool, evsel->handler.data, sample, machine, thread);
} }
return 0; return 0;
} }
static struct perf_sched perf_sched = { static struct perf_tool perf_sched = {
.tool = { .sample = perf_sched__process_tracepoint_sample,
.sample = perf_sched__process_tracepoint_sample, .comm = perf_event__process_comm,
.comm = perf_event__process_comm, .lost = perf_event__process_lost,
.lost = perf_event__process_lost, .fork = perf_event__process_task,
.fork = perf_event__process_task, .ordered_samples = true,
.ordered_samples = true,
},
}; };
static void read_events(bool destroy, struct perf_session **psession) static void read_events(bool destroy, struct perf_session **psession)
@ -1652,18 +1638,15 @@ static void read_events(bool destroy, struct perf_session **psession)
}; };
struct perf_session *session; struct perf_session *session;
session = perf_session__new(input_name, O_RDONLY, 0, false, session = perf_session__new(input_name, O_RDONLY, 0, false, &perf_sched);
&perf_sched.tool);
if (session == NULL) if (session == NULL)
die("No Memory"); die("No Memory");
perf_sched.session = session;
err = perf_session__set_tracepoints_handlers(session, handlers); err = perf_session__set_tracepoints_handlers(session, handlers);
assert(err == 0); assert(err == 0);
if (perf_session__has_traces(session, "record -R")) { if (perf_session__has_traces(session, "record -R")) {
err = perf_session__process_events(session, &perf_sched.tool); err = perf_session__process_events(session, &perf_sched);
if (err) if (err)
die("Failed to process events, error %d", err); die("Failed to process events, error %d", err);

29
tools/perf/builtin-script.c
View file

@ -262,14 +262,11 @@ static int perf_session__check_output_opt(struct perf_session *session)
return 0; return 0;
} }
static void print_sample_start(struct pevent *pevent, static void print_sample_start(struct perf_sample *sample,
struct perf_sample *sample,
struct thread *thread, struct thread *thread,
struct perf_evsel *evsel) struct perf_evsel *evsel)
{ {
int type;
struct perf_event_attr *attr = &evsel->attr; struct perf_event_attr *attr = &evsel->attr;
struct event_format *event;
const char *evname = NULL; const char *evname = NULL;
unsigned long secs; unsigned long secs;
unsigned long usecs; unsigned long usecs;
@ -307,20 +304,7 @@ static void print_sample_start(struct pevent *pevent,
} }
if (PRINT_FIELD(EVNAME)) { if (PRINT_FIELD(EVNAME)) {
if (attr->type == PERF_TYPE_TRACEPOINT) { evname = perf_evsel__name(evsel);
/*
* XXX Do we really need this here?
* perf_evlist__set_tracepoint_names should have done
* this already
*/
type = trace_parse_common_type(pevent,
sample->raw_data);
event = pevent_find_event(pevent, type);
if (event)
evname = event->name;
} else
evname = perf_evsel__name(evsel);
printf("%s: ", evname ? evname : "[unknown]"); printf("%s: ", evname ? evname : "[unknown]");
} }
} }
@ -416,7 +400,7 @@ static void print_sample_bts(union perf_event *event,
} }
static void process_event(union perf_event *event __unused, static void process_event(union perf_event *event __unused,
struct pevent *pevent, struct pevent *pevent __unused,
struct perf_sample *sample, struct perf_sample *sample,
struct perf_evsel *evsel, struct perf_evsel *evsel,
struct machine *machine, struct machine *machine,
@ -427,7 +411,7 @@ static void process_event(union perf_event *event __unused,
if (output[attr->type].fields == 0) if (output[attr->type].fields == 0)
return; return;
print_sample_start(pevent, sample, thread, evsel); print_sample_start(sample, thread, evsel);
if (is_bts_event(attr)) { if (is_bts_event(attr)) {
print_sample_bts(event, sample, evsel, machine, thread); print_sample_bts(event, sample, evsel, machine, thread);
@ -435,9 +419,8 @@ static void process_event(union perf_event *event __unused,
} }
if (PRINT_FIELD(TRACE)) if (PRINT_FIELD(TRACE))
print_trace_event(pevent, sample->cpu, sample->raw_data, event_format__print(evsel->tp_format, sample->cpu,
sample->raw_size); sample->raw_data, sample->raw_size);
if (PRINT_FIELD(ADDR)) if (PRINT_FIELD(ADDR))
print_sample_addr(event, sample, machine, thread, attr); print_sample_addr(event, sample, machine, thread, attr);

1
tools/perf/util/evsel.h
View file

@ -56,6 +56,7 @@ struct perf_evsel {
int ids; int ids;
struct hists hists; struct hists hists;
char *name; char *name;
struct event_format *tp_format;
union { union {
void *priv; void *priv;
off_t id_offset; off_t id_offset;

1
tools/perf/util/header.c
View file

@ -2123,6 +2123,7 @@ static int perf_evsel__set_tracepoint_name(struct perf_evsel *evsel,
if (event->name == NULL) if (event->name == NULL)
return -1; return -1;
evsel->tp_format = event;
return 0; return 0;
} }

13
tools/perf/util/scripting-engines/trace-event-perl.c
View file

@ -237,16 +237,16 @@ static void define_event_symbols(struct event_format *event,
define_event_symbols(event, ev_name, args->next); define_event_symbols(event, ev_name, args->next);
} }
static inline static inline struct event_format *find_cache_event(struct perf_evsel *evsel)
struct event_format *find_cache_event(struct pevent *pevent, int type)
{ {
static char ev_name[256]; static char ev_name[256];
struct event_format *event; struct event_format *event;
int type = evsel->attr.config;
if (events[type]) if (events[type])
return events[type]; return events[type];
events[type] = event = pevent_find_event(pevent, type); events[type] = event = evsel->tp_format;
if (!event) if (!event)
return NULL; return NULL;
@ -269,7 +269,6 @@ static void perl_process_tracepoint(union perf_event *perf_event __unused,
unsigned long long val; unsigned long long val;
unsigned long s, ns; unsigned long s, ns;
struct event_format *event; struct event_format *event;
int type;
int pid; int pid;
int cpu = sample->cpu; int cpu = sample->cpu;
void *data = sample->raw_data; void *data = sample->raw_data;
@ -281,11 +280,9 @@ static void perl_process_tracepoint(union perf_event *perf_event __unused,
if (evsel->attr.type != PERF_TYPE_TRACEPOINT) if (evsel->attr.type != PERF_TYPE_TRACEPOINT)
return; return;
type = trace_parse_common_type(pevent, data); event = find_cache_event(evsel);
event = find_cache_event(pevent, type);
if (!event) if (!event)
die("ug! no event found for type %d", type); die("ug! no event found for type %d", evsel->attr.config);
pid = trace_parse_common_pid(pevent, data); pid = trace_parse_common_pid(pevent, data);

21
tools/perf/util/scripting-engines/trace-event-python.c
View file

@ -27,6 +27,7 @@
#include <errno.h> #include <errno.h>
#include "../../perf.h" #include "../../perf.h"
#include "../evsel.h"
#include "../util.h" #include "../util.h"
#include "../event.h" #include "../event.h"
#include "../thread.h" #include "../thread.h"
@ -194,16 +195,21 @@ static void define_event_symbols(struct event_format *event,
define_event_symbols(event, ev_name, args->next); define_event_symbols(event, ev_name, args->next);
} }
static inline static inline struct event_format *find_cache_event(struct perf_evsel *evsel)
struct event_format *find_cache_event(struct pevent *pevent, int type)
{ {
static char ev_name[256]; static char ev_name[256];
struct event_format *event; struct event_format *event;
int type = evsel->attr.config;
/*
* XXX: Do we really need to cache this since now we have evsel->tp_format
* cached already? Need to re-read this "cache" routine that as well calls
* define_event_symbols() :-\
*/
if (events[type]) if (events[type])
return events[type]; return events[type];
events[type] = event = pevent_find_event(pevent, type); events[type] = event = evsel->tp_format;
if (!event) if (!event)
return NULL; return NULL;
@ -217,7 +223,7 @@ struct event_format *find_cache_event(struct pevent *pevent, int type)
static void python_process_event(union perf_event *perf_event __unused, static void python_process_event(union perf_event *perf_event __unused,
struct pevent *pevent, struct pevent *pevent,
struct perf_sample *sample, struct perf_sample *sample,
struct perf_evsel *evsel __unused, struct perf_evsel *evsel,
struct machine *machine __unused, struct machine *machine __unused,
struct thread *thread) struct thread *thread)
{ {
@ -228,7 +234,6 @@ static void python_process_event(union perf_event *perf_event __unused,
unsigned long s, ns; unsigned long s, ns;
struct event_format *event; struct event_format *event;
unsigned n = 0; unsigned n = 0;
int type;
int pid; int pid;
int cpu = sample->cpu; int cpu = sample->cpu;
void *data = sample->raw_data; void *data = sample->raw_data;
@ -239,11 +244,9 @@ static void python_process_event(union perf_event *perf_event __unused,
if (!t) if (!t)
Py_FatalError("couldn't create Python tuple"); Py_FatalError("couldn't create Python tuple");
type = trace_parse_common_type(pevent, data); event = find_cache_event(evsel);
event = find_cache_event(pevent, type);
if (!event) if (!event)
die("ug! no event found for type %d", type); die("ug! no event found for type %d", (int)evsel->attr.config);
pid = trace_parse_common_pid(pevent, data); pid = trace_parse_common_pid(pevent, data);

26
tools/perf/util/trace-event-parse.c
View file

@ -167,20 +167,11 @@ unsigned long long read_size(struct pevent *pevent, void *ptr, int size)
return pevent_read_number(pevent, ptr, size); return pevent_read_number(pevent, ptr, size);
} }
void print_trace_event(struct pevent *pevent, int cpu, void *data, int size) void event_format__print(struct event_format *event,
int cpu, void *data, int size)
{ {
struct event_format *event;
struct pevent_record record; struct pevent_record record;
struct trace_seq s; struct trace_seq s;
int type;
type = trace_parse_common_type(pevent, data);
event = pevent_find_event(pevent, type);
if (!event) {
warning("ug! no event found for type %d", type);
return;
}
memset(&record, 0, sizeof(record)); memset(&record, 0, sizeof(record));
record.cpu = cpu; record.cpu = cpu;
@ -192,6 +183,19 @@ void print_trace_event(struct pevent *pevent, int cpu, void *data, int size)
trace_seq_do_printf(&s); trace_seq_do_printf(&s);
} }
void print_trace_event(struct pevent *pevent, int cpu, void *data, int size)
{
int type = trace_parse_common_type(pevent, data);
struct event_format *event = pevent_find_event(pevent, type);
if (!event) {
warning("ug! no event found for type %d", type);
return;
}
event_format__print(event, cpu, data, size);
}
void print_event(struct pevent *pevent, int cpu, void *data, int size, void print_event(struct pevent *pevent, int cpu, void *data, int size,
unsigned long long nsecs, char *comm) unsigned long long nsecs, char *comm)
{ {

2
tools/perf/util/trace-event.h
View file

@ -32,6 +32,8 @@ int bigendian(void);
struct pevent *read_trace_init(int file_bigendian, int host_bigendian); struct pevent *read_trace_init(int file_bigendian, int host_bigendian);
void print_trace_event(struct pevent *pevent, int cpu, void *data, int size); void print_trace_event(struct pevent *pevent, int cpu, void *data, int size);
void event_format__print(struct event_format *event,
int cpu, void *data, int size);
void print_event(struct pevent *pevent, int cpu, void *data, int size, void print_event(struct pevent *pevent, int cpu, void *data, int size,
unsigned long long nsecs, char *comm); unsigned long long nsecs, char *comm);