This performance regression saga continues.... I installed Ubuntu Lucid Lynx rc2 which is based on 2.6.32-something. The performance is as expected (89/90MB/s) doing my simple dd test.
I downloaded 2.6.32.7 from kernel.org and compiled a kernel using the Ubuntu config file as a starting point (added bnx driver as compiled in rather than a module and enabled sysfs deprecated support). I installed the resulting .deb and booted up (ignoring the sysfs warning...). My dd test (on the Lucid Lynx system running my 2.6.32.7 kernel) gave around 90MB/s - so performance is as expected. I copied the compiled .deb to a Ubuntu 8.04 system and installed it. The dd test (on the Hardy Heron system running the same 2.6.32.7 kernel as above) gave around 21MB/s. I have performed these tests on two different HP DL360G5s just incase there is some oddity with the hardware. So based on this new information, I am now not 100% sure that the performance regression lies with the cciss driver itself, but could perhaps be a result of some kernel parameters that the Ubuntu distribution tweaks. I compared the hardy and lucid based systems' sysctl, /proc/sys and /sys parameters. Nothing in there jumped out as being obviously related to this issue. I am still at a loss and really wish I could get 2.6.32 running on a Hardy based Ubuntu system with decent cciss driver performance. -- HP cciss / SmartArray responding slowly https://bugs.launchpad.net/bugs/337419 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
