Hi James, I tested (as I wrote a few days ago) the latest PV drivers release, and they seem to work correctly apart of the "Safely remove Xen Net Device Driver" tray icon glitch. I made a series of benchmarks with PassMark''s PerformanceTest on 6 twin concurrent VMs with the PV drivers installed, both with the /GPLPV switch on and off, and on one lonely VM, still in both situations. I tested in particular the disk performance and I noticed a decrease of I/O throughput, while at the same time a significant decrease of the VM CPU utilization. The test results can be downloaded from: http://www.roxantis.com/xen/gplpv_bench.zip Best Regards, Sandro _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On 14/07/2008 12:23, Sandro Sigala wrote:> I tested in particular the disk performance and I noticed a decrease of I/O > throughput, while at the same time a significant decrease of the VM CPU > utilization.So the fastest throughput you ever saw was 1.7MB/s? What sized chunks does PassMark use? I''ve not tested since -pre5, but roughly what I saw with IOmeter was this Block random random seq seq random seq size rd wr rd wr rd/wr rd/wr ===== ====== ====== ====== ====== ====== ====4KB 20MB/s 1MB/s 20MB/s 1MB/s N/A N/A 1MB 50MB/s 50MB/s 50MB/s 50MB/s 30MB/s 30MB/s With two separate disks on one VM, I could get aggregate throughput of 180MB/s. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Hi There is something wrong with your system. Not getting above 1.8 MB/s is not okay. I attached a graph of PassMark on my system, reaching 40.8 MB/s... Note that this speed is reached WITHOUT PV drivers. I assume the PV drivers would be even faster, but the net device does not work form e. Regards, Steffen -----Ursprüngliche Nachricht----- Von: xen-users-bounces@lists.xensource.com [mailto:xen-users-bounces@lists.xensource.com] Im Auftrag von Sandro Sigala Gesendet: Montag, 14. Juli 2008 13:23 An: James Harper Cc: xen-users Betreff: [Xen-users] GPLPV benchmark results Hi James, I tested (as I wrote a few days ago) the latest PV drivers release, and they seem to work correctly apart of the "Safely remove Xen Net Device Driver" tray icon glitch. I made a series of benchmarks with PassMark''s PerformanceTest on 6 twin concurrent VMs with the PV drivers installed, both with the /GPLPV switch on and off, and on one lonely VM, still in both situations. I tested in particular the disk performance and I noticed a decrease of I/O throughput, while at the same time a significant decrease of the VM CPU utilization. The test results can be downloaded from: http://www.roxantis.com/xen/gplpv_bench.zip Best Regards, Sandro _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users