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2008 May 17
4
vcpus higher than real cpus possible?
Hello, i have just migrated machine to xen server where only 2 cpus are
available. I have copied config from machine where domU was located before.
That machine had 4 CPUS (QUADCORE), current machine has 2 CPUS (1 XEON
2cores).
I have forgot to change vcpus from 4 to 2 in config, but .. what really
surprised me ... machine started . How it is possible? It was really slow
alltought and not possible for working (Windows server 2003).
Thanks for reply!
David
_______________________________________________
Xen-users ma...
2013 Dec 18
2
[PATCH] Btrfs: improve the performance fluctuating of the fsync
...rrent fsync had already completed. Those ordered
extents whose csum was being calculated didn''t belong to the current
fsync, we can ignore them.
By this patch, the performance fluctuating doesn''t happen, and the average
performance grows up by ~2%.
Test Environment:
CPU: 2CPU * 2Cores
Memory: 4GB
Partition: 20GB(HDD)
Test Command:
# sysbench --num-threads=8 --test=fileio --file-num=1 \
> --file-total-size=8G --file-block-size=32768 \
> --file-io-mode=sync --file-fsync-freq=100 \
> --file-fsync-end=no --max-requests=10000 \
> --file-test-mode=rndwr run
Signed-...