Re: Direct io on block device has performance regression on 2.6.xkernel

2005-03-09 Thread David Lang
On Wed, 9 Mar 2005, Andrew Morton wrote: David Lang <[EMAIL PROTECTED]> wrote: (I've seen a 50% performance hit on 2.4 with just a thousand or two threads compared to 2.6) Was that 2.4 kernel a vendor kernel with the O(1) scheduler? no, a kernel.org kernel. the 2.6 kernel is so much faster for

Re: Direct io on block device has performance regression on 2.6.xkernel

2005-03-09 Thread David Lang
On Wed, 9 Mar 2005, Andrew Morton wrote: David Lang [EMAIL PROTECTED] wrote: (I've seen a 50% performance hit on 2.4 with just a thousand or two threads compared to 2.6) Was that 2.4 kernel a vendor kernel with the O(1) scheduler? no, a kernel.org kernel. the 2.6 kernel is so much faster for