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[Qemu-devel] [PULL v3 05/38] block: replace g_new0 with g_new for bottom
From: |
Stefan Hajnoczi |
Subject: |
[Qemu-devel] [PULL v3 05/38] block: replace g_new0 with g_new for bottom half allocation. |
Date: |
Tue, 13 Jan 2015 13:47:43 +0000 |
From: Paolo Bonzini <address@hidden>
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>
Signed-off-by: Kevin Wolf <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
- [Qemu-devel] [PULL v3 00/38] Block patches, Stefan Hajnoczi, 2015/01/13
- [Qemu-devel] [PULL v3 02/38] qemu-iotests: Speed up make check-block, Stefan Hajnoczi, 2015/01/13
- [Qemu-devel] [PULL v3 01/38] qemu-iotests: Remove 091 from quick group, Stefan Hajnoczi, 2015/01/13
- [Qemu-devel] [PULL v3 05/38] block: replace g_new0 with g_new for bottom half allocation.,
Stefan Hajnoczi <=
- [Qemu-devel] [PULL v3 03/38] block: mark AioContext as recursive, Stefan Hajnoczi, 2015/01/13
- [Qemu-devel] [PULL v3 06/38] checkpatch: Brace handling on multi-line condition, Stefan Hajnoczi, 2015/01/13
- [Qemu-devel] [PULL v3 04/38] block: do not allocate an iovec per read of a growable/zero_after_eof BDS, Stefan Hajnoczi, 2015/01/13
- [Qemu-devel] [PULL v3 07/38] block: Get full backing filename from string, Stefan Hajnoczi, 2015/01/13
- [Qemu-devel] [PULL v3 09/38] block: Relative backing file for image creation, Stefan Hajnoczi, 2015/01/13
- [Qemu-devel] [PULL v3 10/38] block/vmdk: Relative backing file for creation, Stefan Hajnoczi, 2015/01/13
- [Qemu-devel] [PULL v3 08/38] block: JSON filenames and relative backing files, Stefan Hajnoczi, 2015/01/13
- [Qemu-devel] [PULL v3 13/38] block: fix spoiling all dirty bitmaps by mirror and migration, Stefan Hajnoczi, 2015/01/13
- [Qemu-devel] [PULL v3 11/38] iotests: Add test for relative backing file names, Stefan Hajnoczi, 2015/01/13
- [Qemu-devel] [PULL v3 14/38] qapi: Comment version info in TransactionAction, Stefan Hajnoczi, 2015/01/13