* Gregory Haskins <ghaskins@xxxxxxxxxx> wrote: > Hi Ingo, > The following patches apply to linux-tip/sched/devel and enhance the > performance of the kernel (specifically in PREEMPT_RT, though they do > not regress mainline performance as far as I can tell). They offer > somewhere between 50-100% speedups in netperf performance, depending > on the test. -tip testing found this boot hang: Linux version 2.6.26-rc8-tip (mingo@dione) (gcc version 4.2.3) #12917 SMP Mon Jun 30 15:06:32 CEST 2008 [...] CPU 1/1 -> Node 0 CPU: Physical Processor ID: 0 CPU: Processor Core ID: 1 CPU1: AMD Athlon(tm) 64 X2 Dual Core Processor 3800+ stepping 02 Brought up 2 CPUs Total of 2 processors activated (8041.15 BogoMIPS). [ hard hang ] with this config: http://redhat.com/~mingo/misc/config-Mon_Jun_30_14_54_19_CEST_2008.bad full bootlog: http://redhat.com/~mingo/misc/hang-Mon_Jun_30_14_54_19_CEST_2008.bad it should continue with this bootup sequence: calling net_ns_init+0x0/0x1a0 net_namespace: 376 bytes initcall net_ns_init+0x0/0x1a0 returned 0 after 0 msecs calling init_smp_flush+0x0/0x60 i've bisected it down to: -------------- | commit cc8160c56843201891766660e3816d2e546c1b17 | Author: Gregory Haskins <ghaskins@xxxxxxxxxx> | Date: Fri Jun 27 14:29:50 2008 -0600 | | sched: enable interrupts and drop rq-lock during newidle balancing -------------- so i've reverted that change for now. Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
