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Date: Fri, 27 Jun 2008 23:03:55 +0530 From: Dhaval Giani <dhaval@...ux.vnet.ibm.com> To: Peter Zijlstra <a.p.zijlstra@...llo.nl> Cc: linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>, Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>, Mike Galbraith <efault@....de> Subject: Re: [PATCH 00/30] SMP-group balancer - take 3 On Fri, Jun 27, 2008 at 01:41:09PM +0200, Peter Zijlstra wrote: > Hi, > > Another go at SMP fairness for group scheduling. > > This code needs some serious testing,.. > > However on my system performance doesn't tank as much as it used to. > I've ran sysbench and volanomark benchmarks. > > The machine is a Quad core (Intel Q9450) with 4GB of RAM. > Fedora9 - x86_64 > > sysbench-0.4.8 + postgresql-8.3.3 > volanomark-2.5.0.9 + openjdk-1.6.0 > > I've used cgroup group scheduling. > > cgroup:/ - means all tasks are in the root group > cgroup:/foo - means all tasks are in a subgroup > > mkdir /cgroup/foo > for i in `cat /cgroup/tasks`; do > echo $i > /cgroup/foo/tasks > done > > The patches are against: tip/auto-sched-next of a few days ago. > > --- > > .25 > > [root@...ns sysbench-0.4.8]# ./doit-psql-256-60sec > 1: transactions: 50514 (841.90 per sec.) > 2: transactions: 98745 (1645.73 per sec.) > 4: transactions: 192682 (3211.31 per sec.) > 8: transactions: 192082 (3201.26 per sec.) > 16: transactions: 188891 (3147.95 per sec.) > 32: transactions: 182364 (3039.12 per sec.) > 64: transactions: 169412 (2822.94 per sec.) > 128: transactions: 139505 (2323.95 per sec.) > 256: transactions: 131516 (2188.98 per sec.) > > [root@...ns vmark]# LOOP_CLIENT_COUNT=1000 ./loopclient.sh 2>&1 | grep Average > Average throughput = 113350 messages per second > Average throughput = 112230 messages per second > Average throughput = 113125 messages per second > > > .26-rc > > cgroup:/ > > [root@...ns sysbench-0.4.8]# ./doit-psql-256-60sec > 1: transactions: 50553 (842.54 per sec.) > 2: transactions: 98625 (1643.74 per sec.) > 4: transactions: 191351 (3189.12 per sec.) > 8: transactions: 193525 (3225.32 per sec.) > 16: transactions: 190516 (3175.10 per sec.) > 32: transactions: 186914 (3114.96 per sec.) > 64: transactions: 178940 (2981.78 per sec.) > 128: transactions: 156430 (2606.00 per sec.) > 256: transactions: 134929 (2246.63 per sec.) > > [root@...ns vmark]# LOOP_CLIENT_COUNT=1000 ./loopclient.sh 2>&1 | grep Average > Average throughput = 124089 messages per second > Average throughput = 121962 messages per second > Average throughput = 121223 messages per second > > > cgroup:/foo > > [root@...ns sysbench-0.4.8]# ./doit-psql-256-60sec > 1: transactions: 50246 (837.43 per sec.) > 2: transactions: 97466 (1624.41 per sec.) > 4: transactions: 179609 (2993.43 per sec.) > 8: transactions: 190931 (3182.07 per sec.) > 16: transactions: 189882 (3164.50 per sec.) > 32: transactions: 184649 (3077.14 per sec.) > 64: transactions: 178200 (2969.46 per sec.) > 128: transactions: 158835 (2646.14 per sec.) > 256: transactions: 142100 (2366.51 per sec.) > > [root@...ns vmark]# LOOP_CLIENT_COUNT=1000 ./loopclient.sh 2>&1 | grep Average > Average throughput = 117789 messages per second > Average throughput = 118154 messages per second > Average throughput = 118945 messages per second > > > .26-rc-smp-group > > cgroup:/ > > [root@...ns sysbench-0.4.8]# ./doit-psql-256-60sec > 1: transactions: 50137 (835.61 per sec.) > 2: transactions: 97406 (1623.41 per sec.) > 4: transactions: 170755 (2845.88 per sec.) > 8: transactions: 187406 (3123.35 per sec.) > 16: transactions: 186865 (3114.18 per sec.) > 32: transactions: 183559 (3059.03 per sec.) > 64: transactions: 176834 (2946.70 per sec.) > 128: transactions: 158882 (2647.04 per sec.) > 256: transactions: 145081 (2415.81 per sec.) > > [root@...ns vmark]# LOOP_CLIENT_COUNT=1000 ./loopclient.sh 2>&1 | grep Average > Average throughput = 121499 messages per second > Average throughput = 120181 messages per second > Average throughput = 119775 messages per second > > > cgroup:/foo > > [root@...ns sysbench-0.4.8]# ./doit-psql-256-60sec > 1: transactions: 49564 (826.06 per sec.) > 2: transactions: 96642 (1610.67 per sec.) > 4: transactions: 183081 (3051.29 per sec.) > 8: transactions: 187553 (3125.79 per sec.) > 16: transactions: 185435 (3090.45 per sec.) > 32: transactions: 182314 (3038.25 per sec.) > 64: transactions: 174527 (2908.22 per sec.) > 128: transactions: 159321 (2654.24 per sec.) > 256: transactions: 140167 (2333.82 per sec.) > > [root@...ns vmark]# LOOP_CLIENT_COUNT=1000 ./loopclient.sh 2>&1 | grep Average > Average throughput = 130208 messages per second > Average throughput = 129086 messages per second > Average throughput = 129362 messages per second Some fairness numbers from tip/master kernel compiles with even number of threads /cgroup/a [dhaval@...dor a]$ time make -j8 real 1m53.033s user 1m28.785s sys 0m22.224s /cgroup/b [dhaval@...dor b]$ time make -j16 real 1m51.826s user 1m29.022s sys 0m21.911s kernel compile with odd number of threads /cgroup/a [dhaval@...dor a]$ time make -j7 real 1m49.441s user 1m26.962s sys 0m21.698s /cgroup/b [dhaval@...dor b]$ time make -j13 real 1m50.418s user 1m26.888s sys 0m21.508s Running infinite loops in parallel (5 in one group, 2 in another) 8789 - 8793 belong to /cgroup/a 8794, 8795 belong /cgroup/b When we start. PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 8795 dhaval 20 0 1720 264 212 R 54.6 0.0 0:06.31 test 8794 dhaval 20 0 1720 264 212 R 45.6 0.0 0:06.91 test 8790 dhaval 20 0 1720 264 212 R 23.0 0.0 0:07.29 test 8789 dhaval 20 0 1720 260 212 R 22.6 0.0 0:07.80 test 8791 dhaval 20 0 1720 264 212 R 18.3 0.0 0:07.28 test 8792 dhaval 20 0 1720 260 212 R 18.3 0.0 0:07.01 test 8793 dhaval 20 0 1720 260 212 R 18.0 0.0 0:06.93 test After sometime PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 8794 dhaval 20 0 1720 264 212 R 49.9 0.0 0:46.98 test 8795 dhaval 20 0 1720 264 212 R 49.9 0.0 0:52.61 test 8793 dhaval 20 0 1720 260 212 R 20.3 0.0 0:24.96 test 8789 dhaval 20 0 1720 260 212 R 20.0 0.0 0:24.83 test 8790 dhaval 20 0 1720 264 212 R 20.0 0.0 0:24.32 test 8791 dhaval 20 0 1720 264 212 R 20.0 0.0 0:23.29 test 8792 dhaval 20 0 1720 260 212 R 20.0 0.0 0:25.04 test But these numbers are not very stable. Also it takes a long time (~1min) to converge here. The results look really good though. -- regards, Dhaval -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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