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| author | Daniel P. Berrangé <berrange@redhat.com> | 2025-06-10 13:36:47 +0100 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2025-06-12 13:39:08 -0400 |
| commit | 8236e206084b832d1d7ec947a4798b818f4cdf1f (patch) | |
| tree | 55cd4031835aabbdf7a6a9baffc6fa55b5559e62 | |
| parent | ca2cc0385d97cea66cd54ee42553f385c403d4a6 (diff) | |
| download | qemu-8236e206084b832d1d7ec947a4798b818f4cdf1f.zip qemu-8236e206084b832d1d7ec947a4798b818f4cdf1f.tar.gz qemu-8236e206084b832d1d7ec947a4798b818f4cdf1f.tar.bz2 | |
hw/audio/es1370: skip automatic zero-init of large array
The 'es1370_transfer_audio' method has a 4k byte array used for
copying data between the audio backend and device. Skip the automatic
zero-init of this array to eliminate the performance overhead in
the I/O hot path.
The 'tmpbuf' array will be fully initialized when reading data from
the audio backend and/or device memory.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20250610123709.835102-10-berrange@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
| -rw-r--r-- | hw/audio/es1370.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/audio/es1370.c b/hw/audio/es1370.c index 8efb969..a6a32a6 100644 --- a/hw/audio/es1370.c +++ b/hw/audio/es1370.c @@ -604,7 +604,7 @@ static uint64_t es1370_read(void *opaque, hwaddr addr, unsigned size) static void es1370_transfer_audio (ES1370State *s, struct chan *d, int loop_sel, int max, bool *irq) { - uint8_t tmpbuf[4096]; + QEMU_UNINITIALIZED uint8_t tmpbuf[4096]; size_t to_transfer; uint32_t addr = d->frame_addr; int sc = d->scount & 0xffff; |