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| author | Daniel P. Berrangé <berrange@redhat.com> | 2025-06-10 13:37:00 +0100 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2025-06-12 13:40:16 -0400 |
| commit | 8b723287b84a62bb5d1a7799ef0959ca8e6c293a (patch) | |
| tree | f4d3c351b0e9489fcefb6425fc80dad87742dfb1 | |
| parent | 21cf31c51a7aeff4270c9b30b37e019c536d54b2 (diff) | |
| download | qemu-8b723287b84a62bb5d1a7799ef0959ca8e6c293a.zip qemu-8b723287b84a62bb5d1a7799ef0959ca8e6c293a.tar.gz qemu-8b723287b84a62bb5d1a7799ef0959ca8e6c293a.tar.bz2 | |
hw/net/xgamc: skip automatic zero-init of large array
The 'xgmac_enet_send' method has a 8k 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 'frame' buffer will be fully initialized when reading guest
memory to fetch the data to send.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20250610123709.835102-23-berrange@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
| -rw-r--r-- | hw/net/xgmac.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/net/xgmac.c b/hw/net/xgmac.c index 9c87c4e..d45f872 100644 --- a/hw/net/xgmac.c +++ b/hw/net/xgmac.c @@ -207,7 +207,7 @@ static void xgmac_enet_send(XgmacState *s) struct desc bd; int frame_size; int len; - uint8_t frame[8192]; + QEMU_UNINITIALIZED uint8_t frame[8192]; uint8_t *ptr; ptr = frame; |