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Date: Thu, 4 Oct 2012 15:08:09 -0300
From: Arnaldo Carvalho de Melo <acme@...radead.org>
To: Ingo Molnar <mingo@...nel.org>
Cc: linux-kernel@...r.kernel.org,
Arnaldo Carvalho de Melo <acme@...hat.com>,
David Ahern <dsahern@...il.com>,
Frederic Weisbecker <fweisbec@...il.com>,
Jiri Olsa <jolsa@...hat.com>, Mike Galbraith <efault@....de>,
Namhyung Kim <namhyung@...il.com>,
Paul Mackerras <paulus@...ba.org>,
Peter Zijlstra <peterz@...radead.org>,
Stephane Eranian <eranian@...gle.com>
Subject: [PATCH 09/42] perf trace: Use evsel->handler.func
From: Arnaldo Carvalho de Melo <acme@...hat.com>
I.e. we don't need to resolve the evsel via the id and then check if it
is this or that event, just stash the right handler at evsel creation
time, then use evsel->handler.func() straight away.
Cc: David Ahern <dsahern@...il.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Mike Galbraith <efault@....de>
Cc: Namhyung Kim <namhyung@...il.com>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Stephane Eranian <eranian@...gle.com>
Link: http://lkml.kernel.org/n/tip-bpz3axzr4f2cjppf4egm28wf@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
tools/perf/builtin-trace.c | 132 +++++++++++++++++++++++++++++---------------
1 files changed, 87 insertions(+), 45 deletions(-)
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 8f113da..76b1202 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -114,10 +114,85 @@ static size_t syscall__fprintf_args(struct syscall *sc, unsigned long *args, FIL
return printed;
}
+typedef int (*tracepoint_handler)(struct trace *trace, struct perf_evsel *evsel,
+ struct perf_sample *sample);
+
+static struct syscall *trace__syscall_info(struct trace *trace,
+ struct perf_evsel *evsel,
+ struct perf_sample *sample)
+{
+ int id = perf_evsel__intval(evsel, sample, "id");
+
+ if (id < 0) {
+ printf("Invalid syscall %d id, skipping...\n", id);
+ return NULL;
+ }
+
+ if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL) &&
+ trace__read_syscall_info(trace, id))
+ goto out_cant_read;
+
+ if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL))
+ goto out_cant_read;
+
+ return &trace->syscalls.table[id];
+
+out_cant_read:
+ printf("Problems reading syscall %d information\n", id);
+ return NULL;
+}
+
+static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel,
+ struct perf_sample *sample)
+{
+ void *args;
+ struct syscall *sc = trace__syscall_info(trace, evsel, sample);
+
+ if (sc == NULL)
+ return -1;
+
+ args = perf_evsel__rawptr(evsel, sample, "args");
+ if (args == NULL) {
+ printf("Problems reading syscall arguments\n");
+ return -1;
+ }
+
+ printf("%s(", sc->name);
+ syscall__fprintf_args(sc, args, stdout);
+
+ return 0;
+}
+
+static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
+ struct perf_sample *sample)
+{
+ int ret;
+ struct syscall *sc = trace__syscall_info(trace, evsel, sample);
+
+ if (sc == NULL)
+ return -1;
+
+ ret = perf_evsel__intval(evsel, sample, "ret");
+
+ if (ret < 0 && sc->fmt && sc->fmt->errmsg) {
+ char bf[256];
+ const char *emsg = strerror_r(-ret, bf, sizeof(bf)),
+ *e = audit_errno_to_name(-ret);
+
+ printf(") = -1 %s %s", e, emsg);
+ } else if (ret == 0 && sc->fmt && sc->fmt->timeout)
+ printf(") = 0 Timeout");
+ else
+ printf(") = %d", ret);
+
+ putchar('\n');
+ return 0;
+}
+
static int trace__run(struct trace *trace)
{
struct perf_evlist *evlist = perf_evlist__new(NULL, NULL);
- struct perf_evsel *evsel, *evsel_enter, *evsel_exit;
+ struct perf_evsel *evsel;
int err = -1, i, nr_events = 0, before;
if (evlist == NULL) {
@@ -125,21 +200,23 @@ static int trace__run(struct trace *trace)
goto out;
}
- evsel_enter = perf_evsel__newtp("raw_syscalls", "sys_enter", 0);
- if (evsel_enter == NULL) {
+ evsel = perf_evsel__newtp("raw_syscalls", "sys_enter", 0);
+ if (evsel == NULL) {
printf("Couldn't read the raw_syscalls:sys_enter tracepoint information!\n");
goto out_delete_evlist;
}
- perf_evlist__add(evlist, evsel_enter);
+ evsel->handler.func = trace__sys_enter;
+ perf_evlist__add(evlist, evsel);
- evsel_exit = perf_evsel__newtp("raw_syscalls", "sys_exit", 1);
- if (evsel_exit == NULL) {
+ evsel = perf_evsel__newtp("raw_syscalls", "sys_exit", 1);
+ if (evsel == NULL) {
printf("Couldn't read the raw_syscalls:sys_exit tracepoint information!\n");
goto out_delete_evlist;
}
- perf_evlist__add(evlist, evsel_exit);
+ evsel->handler.func = trace__sys_exit;
+ perf_evlist__add(evlist, evsel);
err = perf_evlist__create_maps(evlist, &trace->opts.target);
if (err < 0) {
@@ -170,9 +247,8 @@ again:
while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
const u32 type = event->header.type;
- struct syscall *sc;
+ tracepoint_handler handler;
struct perf_sample sample;
- int id;
++nr_events;
@@ -200,45 +276,11 @@ again:
continue;
}
- id = perf_evsel__intval(evsel, &sample, "id");
- if (id < 0) {
- printf("Invalid syscall %d id, skipping...\n", id);
- continue;
- }
-
- if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL) &&
- trace__read_syscall_info(trace, id))
- continue;
-
- if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL))
- continue;
-
- sc = &trace->syscalls.table[id];
-
if (evlist->threads->map[0] == -1 || evlist->threads->nr > 1)
printf("%d ", sample.tid);
- if (evsel == evsel_enter) {
- void *args = perf_evsel__rawptr(evsel, &sample, "args");
-
- printf("%s(", sc->name);
- syscall__fprintf_args(sc, args, stdout);
- } else if (evsel == evsel_exit) {
- int ret = perf_evsel__intval(evsel, &sample, "ret");
-
- if (ret < 0 && sc->fmt && sc->fmt->errmsg) {
- char bf[256];
- const char *emsg = strerror_r(-ret, bf, sizeof(bf)),
- *e = audit_errno_to_name(-ret);
-
- printf(") = -1 %s %s", e, emsg);
- } else if (ret == 0 && sc->fmt && sc->fmt->timeout)
- printf(") = 0 Timeout");
- else
- printf(") = %d", ret);
-
- putchar('\n');
- }
+ handler = evsel->handler.func;
+ handler(trace, evsel, &sample);
}
}
--
1.7.1
--
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