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| author | Daniel P. Berrangé <berrange@redhat.com> | 2025-06-10 13:37:08 +0100 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2025-06-12 13:40:16 -0400 |
| commit | 751b0e79f1e0e7f88fad2fe2f22595ad03d78859 (patch) | |
| tree | 3cc387fec61b6c488af59c8717aa015af9c7f475 | |
| parent | 7708e298180550eac262c1fd742e6e80c711a5d8 (diff) | |
| download | qemu-751b0e79f1e0e7f88fad2fe2f22595ad03d78859.zip qemu-751b0e79f1e0e7f88fad2fe2f22595ad03d78859.tar.gz qemu-751b0e79f1e0e7f88fad2fe2f22595ad03d78859.tar.bz2 | |
net/socket: skip automatic zero-init of large array
The 'net_socket_send' method has a 68k byte array used for copying
data between guest and host. Skip the automatic zero-init of this
array to eliminate the performance overhead in the I/O hot path.
The 'buf1' array will be fully initialized when reading data off
the network socket.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Klaus Jensen <k.jensen@samsung.com>
Reviewed-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
Message-id: 20250610123709.835102-31-berrange@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
| -rw-r--r-- | net/socket.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/socket.c b/net/socket.c index 8e3702e..784dda6 100644 --- a/net/socket.c +++ b/net/socket.c @@ -157,7 +157,7 @@ static void net_socket_send(void *opaque) NetSocketState *s = opaque; int size; int ret; - uint8_t buf1[NET_BUFSIZE]; + QEMU_UNINITIALIZED uint8_t buf1[NET_BUFSIZE]; const uint8_t *buf; size = recv(s->fd, buf1, sizeof(buf1), 0); |