On Saturday 24 March 2007 04:57, Tim Chen wrote: > On Fri, 2007-03-23 at 13:40 +1100, Con Kolivas wrote: > > Volanomark is a purely yield() semantic dependant workload (as > > discussed many times previously). In the earlier form of RSDL I > > softened the effect of sched_yield but other changes since then have > > made that softness bordering on a noop. Obviously when sched_yield is > > relied upon that will not be enough. Extending the rr interval simply > > makes the yield slightly more effective and is not the proper > > workaround. Since expiration of arrays is a regular frequent > > occurrence in RSDL then changing yield semantics back to expiration > > should cause a massive improvement in these values, without making the > > yields as long as in mainline. It's impossible to know exactly what > > the final result will be since java uses this timing sensitive yield > > for locking but we can improve it drastically from this. I'll make a > > patch soon to change yield again. > > Con, > > The new RSDL 0.33 has fully recovered the loss in performance for > Volanomark. The throughput for Volanomark is at the same level as > mainline 2.6.21-rc4 kernel. > > Tim
Thanks very much for testing. I'm quite happy with the yield semantics staying the way they are in rSDl 0.33+. -- -ck - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/