On Sun, Mar 2, 2008 at 11:50 AM, Erez Zilber <[EMAIL PROTECTED]> wrote: > Mike Christie wrote: > > Erez Zilber wrote: > >> Hi, > >> > >> I'm using the latest stgt release (tgt-20071227) and I see different > >> throughput numbers for READ commands on SLES 10 & RHEL 5.1. I'm using > >> stgt with iSCSI over iSER. > >> > >> I'm using the same initiator (open-iscsi 865.15 from OFED 1.3 rc4) and > >> the same target machine. The target machine has 2 partitions - one is > >> SLES 10 & the other is RHEL 5.1. When I run READ commands against the > >> target on SLES 10, I get ~400 MB/sec (which is the throughput of the > >> LUN). When I run the same READ commands from the same initiator against > >> the target on RHEL 5.1, I get only 240 MB/sec. > >> > >> Is there anything that I need to config on the RHEL 5.1 machine? BTW - > >> if I run the same test directly from the target machine, I get 400 > >> MB/sec on both distros. > >> > >> Here's the command that I use: > >> > >> sgp_dd if=/dev/sdc of=/dev/null bs=512 bpt=1024 thr=8 time=1 > >> count=20480000 > >> > > > > Does this command try to keep 8 IOs running in parrallel, and if so > > did you try the noop scheduler (I think for SG_IO this will not make a > > difference)? > > I tried noop & cfq, but didn't see any dramatic change. BTW - > if=/dev/sg3 (not /dev/sdc), so the command that I'm running is: > > sgp_dd if=/dev/sg3 of=/dev/null bs=512 bpt=1024 thr=8 time=1 count=20480000 > > > > > > Is the target by any chance running on a x86_64 box? > > Yes. Which box are you using? BTW - our non-stgt target is also running > on a x86_64 box successfully. > > Erez > > Mike,
Do you have any update (other ideas) on this issue? Eli _______________________________________________ Stgt-devel mailing list [email protected] https://lists.berlios.de/mailman/listinfo/stgt-devel
