Hi all, hope this reaches someone who might know the more intimate details of the pvscsi driver's development. I've been running numerous centos 5 x86_64 installs on vmware ESXi 4.1 with EMC storage on the back end. Since the pvscsi is not built in, I only mount /var on a pvscsi adaptor and hard disk after installing the vmware-open-vm-tools-kmod-8.3.2-257589.el5.x86_64 and associated packages, and the rest of the OS on a vmware LSI SAS hard disk that it can see during install. This package includes the pvscsi.ko version 1.0.1.1.
With this configuration, I typically see about 260 MB/sec write speeds, 500 MB/sec read speeds and anywhere from 7000 to 11,000 IOPS depending on the number of drives in the LUN on the EMC. With CentOS 6, it comes with vmw_pvscsi.ko module version 1.0.1.0-k which I assume is actually an older version than what the open tools install. In any case, with CentOS 6 x86_64 running on an identical configuration (same vmware host, same EMC LUN, same size vmdk file, same /var partition) I'm lucky to get 70 to 80 MB/sec write, 250 MB/sec read, 800 IOPS; so dramatically lower performance. The only difference I could find in the pvscsi mod config is that disable_msix defaults to on in 1.0.1.1 and off in 1.0.1.0-k. I did try turning it off via a boot flag, and verified it was off under /sys, but the performance was not affected; still bad. I tried to install the el5 rpm on centos 6 to get the other module working but that just produces an error "pvscsi: no symbol version for module_layout". I also tried to manually rebuild a new initrd using the pvscsi.ko file but have not been able to figure out the magic combination of files, command, etc. to get a bootable machine yet. Any ideas? Thanks, David ------------------------------------------------------------------------------ RSA(R) Conference 2012 Save $700 by Nov 18 Register now http://p.sf.net/sfu/rsa-sfdev2dev1 _______________________________________________ open-vm-tools-devel mailing list open-vm-tools-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/open-vm-tools-devel
