On 26.3.2013 23:05, Eric Blake wrote:
On 03/22/2013 07:16 AM, Pavel Hrdina wrote:
s/icrease/increase/ in the subject
Some benchmark numbers in the commit message justifying your change
would be nice.
Signed-off-by: Pavel Hrdina <phrd...@redhat.com>
---
savevm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/savevm.c b/savevm.c
index 3e3d5f8..532c1be 100644
--- a/savevm.c
+++ b/savevm.c
@@ -112,7 +112,7 @@ void qemu_announce_self(void)
/***********************************************************/
/* savevm/loadvm support */
-#define IO_BUF_SIZE 32768
+#define IO_BUF_SIZE 1 * 1024 * 1024
Improperly parenthesized; needs to be:
#define IO_BUF_SIZE (1 * 1024 * 1024)
I'm testing it now and it seems that there is no speed improvement.
I'll drop this patch from the series.
Both values makes first snapshot (means that there is no snapshot at
all) in about 30s. Second snapshots takes about 320s and third snapshot
after restarting qemu process takes the same as second snapshot.
Test enviroment is:
guest:
2G ram
2 vcpus
qcow2 disk image
host:
12G ram
1cpu/4 core/8 threads
ordinary 7200rpm/500G hdd
