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Date: Thu, 19 Jun 2014 18:13:53 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Ingo Molnar <mingo@...nel.org>
Cc: linux-kernel@...r.kernel.org, Davidlohr Bueso <davidlohr@...com>,
Aswin Chandramouleeswaran <aswin@...com>,
Hitoshi Mitake <mitake@....info.waseda.ac.jp>,
Jiri Olsa <jolsa@...nel.org>,
Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH 11/11] perf bench sched-messaging: Drop barf()
From: Davidlohr Bueso <davidlohr@...com>
Instead of reinventing the wheel, we can use err(2) when dealing with
fatal errors. Exit code is now always EXIT_FAILURE (1).
Signed-off-by: Davidlohr Bueso <davidlohr@...com>
Cc: Aswin Chandramouleeswaran <aswin@...com>
Cc: Hitoshi Mitake <mitake@....info.waseda.ac.jp>
Cc: Jiri Olsa <jolsa@...nel.org>
Link: http://lkml.kernel.org/r/1402942467-10671-9-git-send-email-davidlohr@hp.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
tools/perf/bench/sched-messaging.c | 45 ++++++++++++++++----------------------
1 file changed, 19 insertions(+), 26 deletions(-)
diff --git a/tools/perf/bench/sched-messaging.c b/tools/perf/bench/sched-messaging.c
index fc4fe91ee098..52a56599a543 100644
--- a/tools/perf/bench/sched-messaging.c
+++ b/tools/perf/bench/sched-messaging.c
@@ -28,6 +28,7 @@
#include <sys/time.h>
#include <sys/poll.h>
#include <limits.h>
+#include <err.h>
#define DATASIZE 100
@@ -50,12 +51,6 @@ struct receiver_context {
int wakefd;
};
-static void barf(const char *msg)
-{
- fprintf(stderr, "%s (error: %s)\n", msg, strerror(errno));
- exit(1);
-}
-
static void fdpair(int fds[2])
{
if (use_pipes) {
@@ -66,7 +61,7 @@ static void fdpair(int fds[2])
return;
}
- barf(use_pipes ? "pipe()" : "socketpair()");
+ err(EXIT_FAILURE, use_pipes ? "pipe()" : "socketpair()");
}
/* Block until we're ready to go */
@@ -77,11 +72,11 @@ static void ready(int ready_out, int wakefd)
/* Tell them we're ready. */
if (write(ready_out, &dummy, 1) != 1)
- barf("CLIENT: ready write");
+ err(EXIT_FAILURE, "CLIENT: ready write");
/* Wait for "GO" signal */
if (poll(&pollfd, 1, -1) != 1)
- barf("poll");
+ err(EXIT_FAILURE, "poll");
}
/* Sender sprays loops messages down each file descriptor */
@@ -101,7 +96,7 @@ again:
ret = write(ctx->out_fds[j], data + done,
sizeof(data)-done);
if (ret < 0)
- barf("SENDER: write");
+ err(EXIT_FAILURE, "SENDER: write");
done += ret;
if (done < DATASIZE)
goto again;
@@ -131,7 +126,7 @@ static void *receiver(struct receiver_context* ctx)
again:
ret = read(ctx->in_fds[0], data + done, DATASIZE - done);
if (ret < 0)
- barf("SERVER: read");
+ err(EXIT_FAILURE, "SERVER: read");
done += ret;
if (done < DATASIZE)
goto again;
@@ -144,14 +139,14 @@ static pthread_t create_worker(void *ctx, void *(*func)(void *))
{
pthread_attr_t attr;
pthread_t childid;
- int err;
+ int ret;
if (!thread_mode) {
/* process mode */
/* Fork the receiver. */
switch (fork()) {
case -1:
- barf("fork()");
+ err(EXIT_FAILURE, "fork()");
break;
case 0:
(*func) (ctx);
@@ -165,19 +160,17 @@ static pthread_t create_worker(void *ctx, void *(*func)(void *))
}
if (pthread_attr_init(&attr) != 0)
- barf("pthread_attr_init:");
+ err(EXIT_FAILURE, "pthread_attr_init:");
#ifndef __ia64__
if (pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN) != 0)
- barf("pthread_attr_setstacksize");
+ err(EXIT_FAILURE, "pthread_attr_setstacksize");
#endif
- err = pthread_create(&childid, &attr, func, ctx);
- if (err != 0) {
- fprintf(stderr, "pthread_create failed: %s (%d)\n",
- strerror(err), err);
- exit(-1);
- }
+ ret = pthread_create(&childid, &attr, func, ctx);
+ if (ret != 0)
+ err(EXIT_FAILURE, "pthread_create failed");
+
return childid;
}
@@ -207,14 +200,14 @@ static unsigned int group(pthread_t *pth,
+ num_fds * sizeof(int));
if (!snd_ctx)
- barf("malloc()");
+ err(EXIT_FAILURE, "malloc()");
for (i = 0; i < num_fds; i++) {
int fds[2];
struct receiver_context *ctx = malloc(sizeof(*ctx));
if (!ctx)
- barf("malloc()");
+ err(EXIT_FAILURE, "malloc()");
/* Create the pipe between client and server */
@@ -281,7 +274,7 @@ int bench_sched_messaging(int argc, const char **argv,
pth_tab = malloc(num_fds * 2 * num_groups * sizeof(pthread_t));
if (!pth_tab)
- barf("main:malloc()");
+ err(EXIT_FAILURE, "main:malloc()");
fdpair(readyfds);
fdpair(wakefds);
@@ -294,13 +287,13 @@ int bench_sched_messaging(int argc, const char **argv,
/* Wait for everyone to be ready */
for (i = 0; i < total_children; i++)
if (read(readyfds[0], &dummy, 1) != 1)
- barf("Reading for readyfds");
+ err(EXIT_FAILURE, "Reading for readyfds");
gettimeofday(&start, NULL);
/* Kick them off */
if (write(wakefds[1], &dummy, 1) != 1)
- barf("Writing to start them");
+ err(EXIT_FAILURE, "Writing to start them");
/* Reap them all */
for (i = 0; i < total_children; i++)
--
1.9.3
--
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