Re: [PATCH 1/2] powerpc/vcpu: Assume dedicated processors as non-preempt
From: Srikar Dronamraju <hidden>
Date: 2019-12-04 15:07:36
* Srikar Dronamraju [off-list ref] [2019-12-04 19:14:58]:
# perf stat -a -r 5 ./schbench v5.4 v5.4 + patch Latency percentiles (usec) Latency percentiles (usec) 49.0000th: 47 50.0000th: 33 74.0000th: 64 75.0000th: 44 89.0000th: 76 90.0000th: 50 94.0000th: 83 95.0000th: 53 *98.0000th: 103 *99.0000th: 57 98.5000th: 2124 99.5000th: 59 98.9000th: 7976 99.9000th: 83 min=-1, max=10519 min=0, max=117 Latency percentiles (usec) Latency percentiles (usec) 49.0000th: 45 50.0000th: 34 74.0000th: 61 75.0000th: 45 89.0000th: 70 90.0000th: 52 94.0000th: 77 95.0000th: 56 *98.0000th: 504 *99.0000th: 62 98.5000th: 4012 99.5000th: 64 98.9000th: 8168 99.9000th: 79 min=-1, max=14500 min=0, max=123 Latency percentiles (usec) Latency percentiles (usec) 49.0000th: 48 50.0000th: 35 74.0000th: 65 75.0000th: 47 89.0000th: 76 90.0000th: 55 94.0000th: 82 95.0000th: 59 *98.0000th: 1098 *99.0000th: 67 98.5000th: 3988 99.5000th: 71 98.9000th: 9360 99.9000th: 98 min=-1, max=19283 min=0, max=137 Latency percentiles (usec) Latency percentiles (usec) 49.0000th: 46 50.0000th: 35 74.0000th: 63 75.0000th: 46 89.0000th: 73 90.0000th: 53 94.0000th: 78 95.0000th: 57 *98.0000th: 113 *99.0000th: 63 98.5000th: 2316 99.5000th: 65 98.9000th: 7704 99.9000th: 83 min=-1, max=17976 min=0, max=139 Latency percentiles (usec) Latency percentiles (usec) 49.0000th: 46 50.0000th: 34 74.0000th: 62 75.0000th: 46 89.0000th: 73 90.0000th: 53 94.0000th: 79 95.0000th: 57 *98.0000th: 97 *99.0000th: 64 98.5000th: 1398 99.5000th: 70 98.9000th: 8136 99.9000th: 100 min=-1, max=10008 min=0, max=142
Just to be clear, since these are latency values, lesser number is better. -- Thanks and Regards Srikar Dronamraju