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virtiofsd: add --thread-pool-size=NUM option

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Add an option to control the size of the thread pool.  Requests are now
processed in parallel by default.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2019-08-01 17:54:09 +01:00 committed by Dr. David Alan Gilbert
parent 28f7a3b026
commit 951b3120db
3 changed files with 10 additions and 3 deletions
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1
tools/virtiofsd/fuse_i.h
View file

@ -72,6 +72,7 @@ struct fuse_session {
int vu_listen_fd;
int vu_socketfd;
struct fv_VuDev *virtio_dev;
int thread_pool_size;
};
struct fuse_chan {

7
tools/virtiofsd/fuse_lowlevel.c
View file

@ -28,6 +28,7 @@
#include <sys/file.h>
#include <unistd.h>
#define THREAD_POOL_SIZE 64
#define OFFSET_MAX 0x7fffffffffffffffLL
@ -2519,6 +2520,7 @@ static const struct fuse_opt fuse_ll_opts[] = {
LL_OPTION("allow_root", deny_others, 1),
LL_OPTION("--socket-path=%s", vu_socket_path, 0),
LL_OPTION("--fd=%d", vu_listen_fd, 0),
LL_OPTION("--thread-pool-size=%d", thread_pool_size, 0),
FUSE_OPT_END
};
@ -2537,7 +2539,9 @@ void fuse_lowlevel_help(void)
printf(
" -o allow_root allow access by root\n"
" --socket-path=PATH path for the vhost-user socket\n"
" --fd=FDNUM fd number of vhost-user socket\n");
" --fd=FDNUM fd number of vhost-user socket\n"
" --thread-pool-size=NUM thread pool size limit (default %d)\n",
THREAD_POOL_SIZE);
}
void fuse_session_destroy(struct fuse_session *se)
@ -2591,6 +2595,7 @@ struct fuse_session *fuse_session_new(struct fuse_args *args,
}
se->fd = -1;
se->vu_listen_fd = -1;
se->thread_pool_size = THREAD_POOL_SIZE;
se->conn.max_write = UINT_MAX;
se->conn.max_readahead = UINT_MAX;

5
tools/virtiofsd/fuse_virtio.c
View file

@ -572,10 +572,11 @@ static void *fv_queue_thread(void *opaque)
struct fv_QueueInfo *qi = opaque;
struct VuDev *dev = &qi->virtio_dev->dev;
struct VuVirtq *q = vu_get_queue(dev, qi->qidx);
struct fuse_session *se = qi->virtio_dev->se;
GThreadPool *pool;
pool = g_thread_pool_new(fv_queue_worker, qi, 1 /* TODO max_threads */,
TRUE, NULL);
pool = g_thread_pool_new(fv_queue_worker, qi, se->thread_pool_size, TRUE,
NULL);
if (!pool) {
fuse_log(FUSE_LOG_ERR, "%s: g_thread_pool_new failed\n", __func__);
return NULL;