Jens Axboe wrote:
On Mon, Apr 30 2007, Alan D. Brunelle wrote:
The results from a single run of an AIM7 DBase load on a 16-way ia64 box
(64GB RAM + 144 FC disks) showed a slight regression (~0.5%) by adding
in this patch. (Graph can be found at
http://free.linux.hp.com/~adb/cfq/cfq_dbase.png ) It is only a single
set of runs, on a single platform, but it is something to keep an eye on
as the regression showed itself across the complete run.
Do you know if this regression is due to worse IO performance, or
increased system CPU usage?
We performed two point runs yesterday (20,000 and 50,000 tasks) and here
are the results:
Kernel Tasks Jobs per Minute %sys (avg)
------ ----- --------------- ----------
2.6.21 20000 60,831.1 39.83%
CFQ br 20000 60,237.4 40.80%
-0.98% +2.44%
2.6.21 50000 60,881.6 40.43%
CFQ br 50000 60,400.6 40.80%
-0.79% +0.92%
So we're seeing a slight IO performance regression with a slight
increase in %system with the CFQ branch. (A chart of the complete run
values is up on http://free.linux.hp.com/~adb/cfq/cfq_20k50k.png ).
Alan
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
