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axfer: test: use memfd_create() for container-test

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The container test program writes audio data frame to file, and read
them from the file, then validate them. For the operations, usage of
any in-memory file is good to shorten time of overall operations.

This commit uses shm via memfd_create(). As a result, overall time to
run is shorten one half of before, depending on machine environment.

I note that we can achieve the same result by using O_TMPFILE flag in
open(2) system call, however the implementation of O_TMPFILE is to add
i-node without name on underling file system, thus it has overhead
depending on implementation in each file system. On the other hand,
memfd_create() is directly relevant to shm and expected to be less
overhead.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Takashi Sakamoto 2021-03-11 14:21:40 +09:00 committed by Jaroslav Kysela
parent c45d994867
commit 2314d746b9
1 changed files with 13 additions and 4 deletions
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17
axfer/test/container-test.c
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@ -6,11 +6,20 @@
//
// Licensed under the terms of the GNU General Public License, version 2.
#include <aconfig.h>
#ifdef HAVE_MEMFD_CREATE
#define _GNU_SOURCE
#endif
#include "../container.h"
#include "../misc.h"
#include "generator.h"
#ifdef HAVE_MEMFD_CREATE
#include <sys/mman.h>
#endif
#include <stdlib.h>
#include <unistd.h>
#include <stdbool.h>
@ -142,16 +151,17 @@ static int callback(struct test_generator *gen, snd_pcm_access_t access,
if (buf == NULL)
return -ENOMEM;
// Remove a result of a previous trial.
unlink(name);
for (i = 0; i < ARRAY_SIZE(entries); ++i) {
int fd;
off64_t pos;
frames_per_second = entries[i];
#ifdef HAVE_MEMFD_CREATE
fd = memfd_create(name, 0);
#else
fd = open(name, O_RDWR | O_CREAT | O_TRUNC, 0644);
#endif
if (fd < 0) {
err = -errno;
break;
@ -176,7 +186,6 @@ static int callback(struct test_generator *gen, snd_pcm_access_t access,
assert(err == 0);
close(fd);
unlink(name);
}
free(buf);