Whew, glad you found the problem Stefan! I was starting to wonder what
was going on. :) Do you mind filling a bug about the control dependencies?
Mark
On 11/07/2012 07:31 AM, Stefan Priebe - Profihost AG wrote:
Am 07.11.2012 10:41, schrieb Stefan Priebe - Profihost AG:
Hello list,
syncfs is much slower than without syncfs to me.
If i compile latest ceph master with wip-rbd-read:
with syncfs:
rand 4K:
write: io=1133MB, bw=12853KB/s, iops=3213, runt= 90277msec
read : io=1239MB, bw=14046KB/s, iops=3511, runt= 90325msec
seq 4M:
write: io=37560MB, bw=423874KB/s, iops=103, runt= 90738msec
read : io=103852MB, bw=1151MB/s, iops=287, runt= 90237msec
without syncfs:
rand 4K:
write: io=3733MB, bw=42459KB/s, iops=10614, runt= 90039msec
read : io=6018MB, bw=68446KB/s, iops=17111, runt= 90038msec
seq 4M:
write: io=51204MB, bw=577328KB/s, iops=140, runt= 90820msec
read : io=150320MB, bw=1666MB/s, iops=416, runt= 90228msec
I thought syncfs should boost the performance.
Fixed - my chroot env with glibc syncfs support didn't had the libcrypto
installed and it isn't in the control dependencies. Now with libcrypto i
get the same results as without syncfs.
Stefan
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