On 02/14/2019 08:23 AM, Davidlohr Bueso wrote: > On Fri, 08 Feb 2019, Waiman Long wrote: >> I am planning to run more performance test and post the data sometimes >> next week. Davidlohr is also going to run some of his rwsem performance >> test on this patchset. > > So I ran this series on a 40-core IB 2 socket with various worklods in > mmtests. Below are some of the interesting ones; full numbers and curves > at https://linux-scalability.org/rwsem-reader-spinner/ > > All workloads are with increasing number of threads. > > -- pagefault timings: pft is an artificial pf benchmark (thus reader > stress). > metric is faults/cpu and faults/sec > v5.0-rc6 v5.0-rc6 > dirty > Hmean faults/cpu-1 624224.9815 ( 0.00%) 618847.5201 * -0.86%* > Hmean faults/cpu-4 539550.3509 ( 0.00%) 547407.5738 * 1.46%* > Hmean faults/cpu-7 401470.3461 ( 0.00%) 381157.9830 * -5.06%* > Hmean faults/cpu-12 267617.0353 ( 0.00%) 271098.5441 * 1.30%* > Hmean faults/cpu-21 176194.4641 ( 0.00%) 175151.3256 * -0.59%* > Hmean faults/cpu-30 119927.3862 ( 0.00%) 120610.1348 * 0.57%* > Hmean faults/cpu-40 91203.6820 ( 0.00%) 91832.7489 * 0.69%* > Hmean faults/sec-1 623292.3467 ( 0.00%) 617992.0795 * -0.85%* > Hmean faults/sec-4 2113364.6898 ( 0.00%) 2140254.8238 * 1.27%* > Hmean faults/sec-7 2557378.4385 ( 0.00%) 2450945.7060 * -4.16%* > Hmean faults/sec-12 2696509.8975 ( 0.00%) 2747968.9819 * 1.91%* > Hmean faults/sec-21 2902892.5639 ( 0.00%) 2905923.3881 * 0.10%* > Hmean faults/sec-30 2956696.5793 ( 0.00%) 2990583.5147 * 1.15%* > Hmean faults/sec-40 3422806.4806 ( 0.00%) 3352970.3082 * -2.04%* > Stddev faults/cpu-1 2949.5159 ( 0.00%) 2802.2712 ( 4.99%) > Stddev faults/cpu-4 24165.9454 ( 0.00%) 15841.1232 ( 34.45%) > Stddev faults/cpu-7 20914.8351 ( 0.00%) 22744.3294 ( -8.75%) > Stddev faults/cpu-12 11274.3490 ( 0.00%) 14733.3152 ( -30.68%) > Stddev faults/cpu-21 2500.1950 ( 0.00%) 2200.9518 ( 11.97%) > Stddev faults/cpu-30 1599.5346 ( 0.00%) 1414.0339 ( 11.60%) > Stddev faults/cpu-40 1473.0181 ( 0.00%) 3004.1209 (-103.94%) > Stddev faults/sec-1 2655.2581 ( 0.00%) 2405.1625 ( 9.42%) > Stddev faults/sec-4 84042.7234 ( 0.00%) 57996.7158 ( 30.99%) > Stddev faults/sec-7 123656.7901 ( 0.00%) 135591.1087 ( -9.65%) > Stddev faults/sec-12 97135.6091 ( 0.00%) 127054.4926 ( -30.80%) > Stddev faults/sec-21 69564.6264 ( 0.00%) 65922.6381 ( 5.24%) > Stddev faults/sec-30 51524.4027 ( 0.00%) 56109.4159 ( -8.90%) > Stddev faults/sec-40 101927.5280 ( 0.00%) 160117.0093 ( -57.09%) > > With the exception of the hicup at 7 threads, things are pretty much in > the noise region for both metrics. > > -- git checkout > > First metric is total runtime for runs with incremental threads. > > v5.0-rc6 v5.0-rc6 > dirty > User 218.95 219.07 > System 149.29 146.82 > Elapsed 1574.10 1427.08 > > In this case there's a non trivial improvement (11%) in overall > elapsed time. > > -- reaim (which is always succeptible to rwsem changes for both > mmap_sem and > i_mmap) > v5.0-rc6 v5.0-rc6 > dirty > Hmean compute-1 6674.01 ( 0.00%) 6544.28 * -1.94%* > Hmean compute-21 85294.91 ( 0.00%) 85524.20 * 0.27%* > Hmean compute-41 149674.70 ( 0.00%) 149494.58 * -0.12%* > Hmean compute-61 177721.15 ( 0.00%) 170507.38 * -4.06%* > Hmean compute-81 181531.07 ( 0.00%) 180463.24 * -0.59%* > Hmean compute-101 189024.09 ( 0.00%) 187288.86 * -0.92%* > Hmean compute-121 200673.24 ( 0.00%) 195327.65 * -2.66%* > Hmean compute-141 213082.29 ( 0.00%) 211290.80 * -0.84%* > Hmean compute-161 207764.06 ( 0.00%) 204626.68 * -1.51%* > > The 'compute' workload overall takes a small hit. > > Hmean new_dbase-1 60.48 ( 0.00%) 60.63 * 0.25%* > Hmean new_dbase-21 6590.49 ( 0.00%) 6671.81 * 1.23%* > Hmean new_dbase-41 14202.91 ( 0.00%) 14470.59 * 1.88%* > Hmean new_dbase-61 21207.24 ( 0.00%) 21067.40 * -0.66%* > Hmean new_dbase-81 25542.40 ( 0.00%) 25542.40 * 0.00%* > Hmean new_dbase-101 30165.28 ( 0.00%) 30046.21 * -0.39%* > Hmean new_dbase-121 33638.33 ( 0.00%) 33219.90 * -1.24%* > Hmean new_dbase-141 36723.70 ( 0.00%) 37504.52 * 2.13%* > Hmean new_dbase-161 42242.51 ( 0.00%) 42117.34 * -0.30%* > Hmean shared-1 76.54 ( 0.00%) 76.09 * -0.59%* > Hmean shared-21 7535.51 ( 0.00%) 5518.75 * -26.76%* > Hmean shared-41 17207.81 ( 0.00%) 14651.94 * -14.85%* > Hmean shared-61 20716.98 ( 0.00%) 18667.52 * -9.89%* > Hmean shared-81 27603.83 ( 0.00%) 23466.45 * -14.99%* > Hmean shared-101 26008.59 ( 0.00%) 29536.96 * 13.57%* > Hmean shared-121 28354.76 ( 0.00%) 43139.39 * 52.14%* > Hmean shared-141 38509.25 ( 0.00%) 41619.35 * 8.08%* > Hmean shared-161 40496.07 ( 0.00%) 44303.46 * 9.40%* > > Overall there is a small hit (in the noise level but consistent > throughout > many workloads), except git-checkout which does quite well. > > Thanks, > Davidlohr Thanks for running the patch through your performance tests. Cheers, Longman
