On Tue, 07 Dec 2010 11:51:05 -0600 Eric Sandeen <sandeen@xxxxxxxxxx> wrote: > The addition of 64k block capability in the rec_len_from_disk > and rec_len_to_disk functions added a bit of math overhead which > slows down file create workloads needlessly when the architecture > cannot even support 64k blocks, thanks to page size limits. > > The directory entry checking can also be optimized a bit > by sprinkling in some unlikely() conditions to move the > error handling out of line. > > bonnie++ sequential file creates on a 512MB ramdisk speeds up > from about 2200/s to about 2500/s, about a 14% improvement. > hrm, that's an improbably-large sounding improvement from eliminating just a few test-n-branches from a pretty heavyweight operation. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
