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[Qemu-devel] [PATCH 3/3] block: replace g_new0 with g_new for bottom hal
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [PATCH 3/3] block: replace g_new0 with g_new for bottom half allocation. |
Date: |
Wed, 17 Dec 2014 16:10:00 +0100 |
This saves about 15% of the clock cycles spent on allocation. Using the
slice allocator does not add a visible improvement; allocation is faster
than malloc, while freeing seems to be slower.
Signed-off-by: Paolo Bonzini <address@hidden>
---
async.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/async.c b/async.c
index 572f239..2be88cc 100644
--- a/async.c
+++ b/async.c
@@ -44,10 +44,12 @@ struct QEMUBH {
QEMUBH *aio_bh_new(AioContext *ctx, QEMUBHFunc *cb, void *opaque)
{
QEMUBH *bh;
- bh = g_new0(QEMUBH, 1);
- bh->ctx = ctx;
- bh->cb = cb;
- bh->opaque = opaque;
+ bh = g_new(QEMUBH, 1);
+ *bh = (QEMUBH){
+ .ctx = ctx,
+ .cb = cb,
+ .opaque = opaque,
+ };
qemu_mutex_lock(&ctx->bh_lock);
bh->next = ctx->first_bh;
/* Make sure that the members are ready before putting bh into list */
--
2.1.0