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perf tools: Derive trigger class from auxtrace_snapshot 

auxtrace_snapshot_state matches the trigger model. Use trigger to
implement it. auxtrace_snapshot_state and auxtrace_snapshot_err are
absorbed.

Signed-off-by: Wang Nan <wangnan0@huawei.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1461178794-40467-3-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Wang Nan 2016-04-20 18:59:49 +00:00 committed by Arnaldo Carvalho de Melo
parent 3dcc4436fa
commit 5f9cf5992c
1 changed files with 20 additions and 53 deletions
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73
tools/perf/builtin-record.c
View File

@ -34,6 +34,7 @@
#include "util/parse-regs-options.h"
#include "util/llvm-utils.h"
#include "util/bpf-loader.h"
#include "util/trigger.h"
#include "asm/bug.h"
#include <unistd.h>
@ -127,44 +128,8 @@ static volatile int done;
static volatile int signr = -1;
static volatile int child_finished;
static volatile enum {
AUXTRACE_SNAPSHOT_OFF = -1,
AUXTRACE_SNAPSHOT_DISABLED = 0,
AUXTRACE_SNAPSHOT_ENABLED = 1,
} auxtrace_snapshot_state = AUXTRACE_SNAPSHOT_OFF;
static inline void
auxtrace_snapshot_on(void)
{
auxtrace_snapshot_state = AUXTRACE_SNAPSHOT_DISABLED;
}
static inline void
auxtrace_snapshot_enable(void)
{
if (auxtrace_snapshot_state == AUXTRACE_SNAPSHOT_OFF)
return;
auxtrace_snapshot_state = AUXTRACE_SNAPSHOT_ENABLED;
}
static inline void
auxtrace_snapshot_disable(void)
{
if (auxtrace_snapshot_state == AUXTRACE_SNAPSHOT_OFF)
return;
auxtrace_snapshot_state = AUXTRACE_SNAPSHOT_DISABLED;
}
static inline bool
auxtrace_snapshot_is_enabled(void)
{
if (auxtrace_snapshot_state == AUXTRACE_SNAPSHOT_OFF)
return false;
return auxtrace_snapshot_state == AUXTRACE_SNAPSHOT_ENABLED;
}
static volatile int auxtrace_snapshot_err;
static volatile int auxtrace_record__snapshot_started;
static DEFINE_TRIGGER(auxtrace_snapshot_trigger);
static void sig_handler(int sig)
{
@ -282,11 +247,12 @@ static void record__read_auxtrace_snapshot(struct record *rec)
{
pr_debug("Recording AUX area tracing snapshot\n");
if (record__auxtrace_read_snapshot_all(rec) < 0) {
auxtrace_snapshot_err = -1;
trigger_error(&auxtrace_snapshot_trigger);
} else {
auxtrace_snapshot_err = auxtrace_record__snapshot_finish(rec->itr);
if (!auxtrace_snapshot_err)
auxtrace_snapshot_enable();
if (auxtrace_record__snapshot_finish(rec->itr))
trigger_error(&auxtrace_snapshot_trigger);
else
trigger_ready(&auxtrace_snapshot_trigger);
}
}
@ -686,7 +652,7 @@ static int __cmd_record(struct record *rec, int argc, const char **argv)
if (rec->opts.auxtrace_snapshot_mode) {
signal(SIGUSR2, snapshot_sig_handler);
auxtrace_snapshot_on();
trigger_on(&auxtrace_snapshot_trigger);
} else {
signal(SIGUSR2, SIG_IGN);
}
@ -815,21 +781,21 @@ static int __cmd_record(struct record *rec, int argc, const char **argv)
perf_evlist__enable(rec->evlist);
}
auxtrace_snapshot_enable();
trigger_ready(&auxtrace_snapshot_trigger);
for (;;) {
unsigned long long hits = rec->samples;
if (record__mmap_read_all(rec) < 0) {
auxtrace_snapshot_disable();
trigger_error(&auxtrace_snapshot_trigger);
err = -1;
goto out_child;
}
if (auxtrace_record__snapshot_started) {
auxtrace_record__snapshot_started = 0;
if (!auxtrace_snapshot_err)
if (!trigger_is_error(&auxtrace_snapshot_trigger))
record__read_auxtrace_snapshot(rec);
if (auxtrace_snapshot_err) {
if (trigger_is_error(&auxtrace_snapshot_trigger)) {
pr_err("AUX area tracing snapshot failed\n");
err = -1;
goto out_child;
@ -858,12 +824,12 @@ static int __cmd_record(struct record *rec, int argc, const char **argv)
* disable events in this case.
*/
if (done && !disabled && !target__none(&opts->target)) {
auxtrace_snapshot_disable();
trigger_off(&auxtrace_snapshot_trigger);
perf_evlist__disable(rec->evlist);
disabled = true;
}
}
auxtrace_snapshot_disable();
trigger_off(&auxtrace_snapshot_trigger);
if (forks && workload_exec_errno) {
char msg[STRERR_BUFSIZE];
@ -1445,9 +1411,10 @@ out_symbol_exit:
static void snapshot_sig_handler(int sig __maybe_unused)
{
if (!auxtrace_snapshot_is_enabled())
return;
auxtrace_snapshot_disable();
auxtrace_snapshot_err = auxtrace_record__snapshot_start(record.itr);
auxtrace_record__snapshot_started = 1;
if (trigger_is_ready(&auxtrace_snapshot_trigger)) {
trigger_hit(&auxtrace_snapshot_trigger);
auxtrace_record__snapshot_started = 1;
if (auxtrace_record__snapshot_start(record.itr))
trigger_error(&auxtrace_snapshot_trigger);
}
}