On Thu, Jul 07, 2011 at 02:09:18PM +0200, Lennert Buytenhek wrote: > On Mon, Jun 27, 2011 at 03:19:43PM +0200, Arnd Bergmann wrote: > > > > > I suppose for the majority of the cases, the overhead of the indirect > > > > function call is near-zero, compared to the overhead of the cache > > > > management operation, so it would only make a difference for coherent > > > > systems without an IOMMU. Do we care about micro-optimizing those? > > FWIW, when I was hacking on ARM access point routing performance some > time ago, turning the L1/L2 cache maintenance operations into inline > functions (inlined into the ethernet driver) gave me a significant and > measurable performance boost. On what architecture? Can you show what you did to gain that? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>