On Thu, Dec 08, 2005 at 03:06:28PM +0100, Joel Palmius wrote:
> Are there any general recommendations for making throughput on UBDs more
> efficient? Such as kernel settings, recommended filesystems..?
>
> Doing an "emerge sync" inside an uml raises iowait to 100% and load to 7,
> making the machine more or less inaccessible. Just wondering if it's me
> having bad settings.
I strongly suspect a bad interaction with the host I/O scheduler, although
I can't prove anything. The UML is just passing read/write requests to the
host and expecting them to be handled somewhat efficiently.
Using AIO helps (~25% on a kernel build), but I still see the same basic
symptoms (nothing running, everything in iowait).
Jeff
-------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc. Do you grep through log files
for problems? Stop! Download the new AJAX search engine that makes
searching your log files as easy as surfing the web. DOWNLOAD SPLUNK!
http://ads.osdn.com/?ad_id=7637&alloc_id=16865&op=click
_______________________________________________
User-mode-linux-user mailing list
User-mode-linux-user@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user
