On Wed, 2013-01-23 at 10:44 +0800, Michael Wang wrote: > On 01/22/2013 10:41 PM, Mike Galbraith wrote: > > On Tue, 2013-01-22 at 16:56 +0800, Michael Wang wrote: > > > >> What about this patch? May be the wrong map is the killer on balance > >> path, should we check it? ;-) > > > > [ 1.232249] Brought up 40 CPUs > > [ 1.236003] smpboot: Total of 40 processors activated (180873.90 > > BogoMIPS) > > [ 1.244744] CPU0 attaching sched-domain: > > [ 1.254131] NMI watchdog: enabled on all CPUs, permanently consumes one > > hw-PMU counter. > > [ 1.252010] domain 0: span 0,16 level SIBLING > > [ 1.280001] groups: 0 (cpu_power = 589) 16 (cpu_power = 589) > > [ 1.292540] domain 1: span > > 0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38 level MC > > [ 1.312001] groups: 0,16 (cpu_power = 1178) 2,18 (cpu_power = 1178) > > 4,20 (cpu_power = 1178) 6,22 (cpu_power = 1178) 8,24 (cpu_power = 1178) > > 10,26 (cpu_power = 1178)12,28 (cpu_power = > > 1178)14,30 (cpu_power = 1178)32,36 (cpu_power = 1178)34,38 (cpu_power = > > 1178) > > [ 1.368002] domain 2: span 0-39 level NUMA > > [ 1.376001] groups: > > 0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38 (cpu_power = 11780) > > > > 1,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31,33,35,37,39 (cpu_power = 11780) > > Thanks for the testing, that's not all the output but just for cpu 0, > correct?
Yeah, I presumed one was enough. You can have more if you like, there's LOTS more where that came from (reboot is amazing with low speed serial console -> high latency low bandwidth DSL conection;). > > [ 1.412546] WYT: sbm of cpu 0 > > [ 1.416001] WYT: exec map > > [ 1.424002] WYT: sd 6ce55000, idx 0, level 0, weight 2 > > [ 1.436001] WYT: sd 6ce74000, idx 1, level 1, weight 20 > > [ 1.448001] WYT: sd 6cef3000, idx 3, level 3, weight 40 > > [ 1.460001] WYT: fork map > > [ 1.468001] WYT: sd 6ce55000, idx 0, level 0, weight 2 > > [ 1.480001] WYT: sd 6ce74000, idx 1, level 1, weight 20 > > This is not by design... sd in idx 2 should point to level 1 sd if there > is no level 2 sd, this part is broken...oh, how could level 3 sd be > there with out level 2 created? strange... > > So with this map, the new balance path will no doubt broken, I think we > got the reason, amazing ;-) > > Let's see how to fix it, hmm... need some study firstly. Another thing that wants fixing: root can set flags for _existing_ domains any way he likes, but when he invokes godly powers to rebuild domains, he gets what's hard coded, which is neither clever (godly wrath;), nor wonderful for godly runtime path decisions. -Mike -- 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/