On Oct 19, 2007, at 10:37 AM, Yuri Tikhonov wrote: > On Friday 19 October 2007 03:21, Paul Mackerras wrote: >> Have you measured the performance using a 64kB page size? If so, how >> does it compare with the 256kB page size? > > I measured the performance of the sequential full-stripe write > operations to > a RAID-5 array (P values below are in MB per second) using the h/w > accelerated > RAID-5 driver. > > Here are the comparative results for the different PAGE_SIZE values: > > PAGE_SIZE = 4K: > P = 66 MBps; > > PAGE_SIZE = 16K: > P = 145 MBps; > > PAGE_SIZE = 64K: > P = 196 MBps; > > PAGE_SIZE = 256K: > P = 217 MBps.
Is this all in kernel space? or is there a user space aspect to the benchmark? >> The 64kB page size has the attraction that no binutils changes are >> required. > > That's true, but the additional performance is an attractive thing > too. - k _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
