On Fri, Jul 11, 2014 at 01:25:10PM -0700, Andi Kleen wrote: > From: Andi Kleen <a...@linux.intel.com> > > These data structures are accessed by different CPUs and have some > fields which are mostly read only and others which are frequently > written. Separate some common ones into separate cache line > to minimize false sharing while submitting a command. > > This allows scsi_dispatch_cmd to do more work with shared clean > cache lines. > > - Move the cmd_serial_number to the end before the host data > - Separate write common fields from read mostly fields in > the scsi device
Looks useful, but please provide some numbers on how this actually helps. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
