Hi, Here are benchmark test runs against patch set v8. There pretty much the same a the v7 results as they should be. 1) Run with 40 distinct sysfs file paths on 80 cpu machine, perf graphs in base-files-cpu-80-perf.txt and patched-files-cpu-80-perf.txt. Base (5.12.3, unpatched) ------------------------ single: total 43.610095ms per 4.361009us concur: total 4515.483148ms per 451.548315us CPU 69 concur: total 4518.304581ms per 451.830458us CPU 17 concur: total 4525.275675ms per 452.527567us CPU 73 concur: total 4531.404107ms per 453.140411us CPU 77 concur: total 4543.011580ms per 454.301158us CPU 57 concur: total 4547.066040ms per 454.706604us CPU 45 concur: total 4547.652917ms per 454.765292us CPU 33 concur: total 4550.700660ms per 455.070066us CPU 5 concur: total 4552.377974ms per 455.237797us CPU 53 concur: total 4557.183667ms per 455.718367us CPU 15 concur: total 4560.088854ms per 456.008885us CPU 25 concur: total 4561.096541ms per 456.109654us CPU 49 concur: total 4562.542284ms per 456.254228us CPU 65 concur: total 4567.247924ms per 456.724792us CPU 29 concur: total 4567.551375ms per 456.755137us CPU 11 concur: total 4576.361518ms per 457.636152us CPU 35 concur: total 4579.072483ms per 457.907248us CPU 13 concur: total 4580.456910ms per 458.045691us CPU 21 concur: total 4581.441238ms per 458.144124us CPU 55 concur: total 4582.808775ms per 458.280878us CPU 37 concur: total 4583.284351ms per 458.328435us CPU 9 concur: total 4583.644571ms per 458.364457us CPU 3 concur: total 4584.435959ms per 458.443596us CPU 51 concur: total 4588.450469ms per 458.845047us CPU 61 concur: total 4588.784765ms per 458.878476us CPU 63 concur: total 4603.455415ms per 460.345542us CPU 27 concur: total 4605.229148ms per 460.522915us CPU 39 concur: total 4605.412438ms per 460.541244us CPU 71 concur: total 4607.079973ms per 460.707997us CPU 23 concur: total 4608.041174ms per 460.804117us CPU 79 concur: total 4608.345038ms per 460.834504us CPU 1 concur: total 4616.631547ms per 461.663155us CPU 19 concur: total 4616.845962ms per 461.684596us CPU 43 concur: total 4617.521385ms per 461.752139us CPU 59 concur: total 4620.077938ms per 462.007794us CPU 41 concur: total 4620.766014ms per 462.076601us CPU 47 concur: total 4622.365869ms per 462.236587us CPU 67 concur: total 4622.546362ms per 462.254636us CPU 31 concur: total 4623.371457ms per 462.337146us CPU 7 concur: total 4673.657084ms per 467.365708us CPU 75 concur: total 4703.545988ms per 470.354599us CPU 48 concur: total 4704.692544ms per 470.469254us CPU 56 concur: total 4705.308174ms per 470.530817us CPU 12 concur: total 4708.179087ms per 470.817909us CPU 52 concur: total 4710.879479ms per 471.087948us CPU 76 concur: total 4712.478473ms per 471.247847us CPU 16 concur: total 4712.897185ms per 471.289718us CPU 64 concur: total 4713.066302ms per 471.306630us CPU 32 concur: total 4713.309041ms per 471.330904us CPU 28 concur: total 4713.775133ms per 471.377513us CPU 8 concur: total 4714.142315ms per 471.414232us CPU 4 concur: total 4714.408679ms per 471.440868us CPU 0 concur: total 4714.823031ms per 471.482303us CPU 68 concur: total 4715.911133ms per 471.591113us CPU 72 concur: total 4716.356891ms per 471.635689us CPU 36 concur: total 4717.148390ms per 471.714839us CPU 74 concur: total 4717.956787ms per 471.795679us CPU 30 concur: total 4718.550180ms per 471.855018us CPU 62 concur: total 4718.780680ms per 471.878068us CPU 20 concur: total 4718.804903ms per 471.880490us CPU 14 concur: total 4719.527173ms per 471.952717us CPU 34 concur: total 4719.610769ms per 471.961077us CPU 44 concur: total 4720.205242ms per 472.020524us CPU 46 concur: total 4720.442429ms per 472.044243us CPU 60 concur: total 4720.844723ms per 472.084472us CPU 24 concur: total 4720.885926ms per 472.088593us CPU 40 concur: total 4721.157172ms per 472.115717us CPU 22 concur: total 4721.325226ms per 472.132523us CPU 42 concur: total 4722.194975ms per 472.219497us CPU 54 concur: total 4722.198238ms per 472.219824us CPU 38 concur: total 4722.270686ms per 472.227069us CPU 10 concur: total 4722.520311ms per 472.252031us CPU 70 concur: total 4722.697182ms per 472.269718us CPU 50 concur: total 4722.814473ms per 472.281447us CPU 2 concur: total 4723.047319ms per 472.304732us CPU 78 concur: total 4723.211099ms per 472.321110us CPU 58 concur: total 4723.325139ms per 472.332514us CPU 6 concur: total 4723.517066ms per 472.351707us CPU 66 concur: total 4723.540041ms per 472.354004us CPU 18 concur: total 4723.532642ms per 472.353264us CPU 26 times: 10000 threads: 80 cpus: 80 patched (5.12.3) ---------------- single: total 42.800654ms per 4.280065us concur: total 1497.315162ms per 149.731516us CPU 40 concur: total 1523.384944ms per 152.338494us CPU 6 concur: total 1527.974937ms per 152.797494us CPU 41 concur: total 1528.611772ms per 152.861177us CPU 4 concur: total 1530.640917ms per 153.064092us CPU 2 concur: total 1531.255960ms per 153.125596us CPU 28 concur: total 1531.502709ms per 153.150271us CPU 22 concur: total 1531.550394ms per 153.155039us CPU 54 concur: total 1531.951529ms per 153.195153us CPU 60 concur: total 1532.197299ms per 153.219730us CPU 78 concur: total 1532.279187ms per 153.227919us CPU 48 concur: total 1533.034026ms per 153.303403us CPU 14 concur: total 1533.558031ms per 153.355803us CPU 32 concur: total 1534.782403ms per 153.478240us CPU 62 concur: total 1534.997189ms per 153.499719us CPU 56 concur: total 1536.109295ms per 153.610929us CPU 38 concur: total 1536.214181ms per 153.621418us CPU 18 concur: total 1537.096808ms per 153.709681us CPU 36 concur: total 1537.612459ms per 153.761246us CPU 42 concur: total 1538.681882ms per 153.868188us CPU 12 concur: total 1538.912144ms per 153.891214us CPU 20 concur: total 1539.133370ms per 153.913337us CPU 76 concur: total 1539.732430ms per 153.973243us CPU 8 concur: total 1540.007044ms per 154.000704us CPU 66 concur: total 1540.497045ms per 154.049704us CPU 44 concur: total 1540.982660ms per 154.098266us CPU 16 concur: total 1541.037031ms per 154.103703us CPU 26 concur: total 1541.441290ms per 154.144129us CPU 72 concur: total 1541.445028ms per 154.144503us CPU 34 concur: total 1541.899099ms per 154.189910us CPU 46 concur: total 1542.395210ms per 154.239521us CPU 74 concur: total 1542.641833ms per 154.264183us CPU 58 concur: total 1543.768222ms per 154.376822us CPU 1 concur: total 1543.781564ms per 154.378156us CPU 10 concur: total 1545.325536ms per 154.532554us CPU 64 concur: total 1545.602875ms per 154.560287us CPU 70 concur: total 1545.628720ms per 154.562872us CPU 30 concur: total 1547.650530ms per 154.765053us CPU 68 concur: total 1547.925833ms per 154.792583us CPU 52 concur: total 1550.700993ms per 155.070099us CPU 24 concur: total 1551.551400ms per 155.155140us CPU 55 concur: total 1552.062602ms per 155.206260us CPU 49 concur: total 1552.084444ms per 155.208444us CPU 33 concur: total 1552.080191ms per 155.208019us CPU 7 concur: total 1552.108824ms per 155.210882us CPU 35 concur: total 1552.169043ms per 155.216904us CPU 50 concur: total 1552.246985ms per 155.224699us CPU 17 concur: total 1552.266063ms per 155.226606us CPU 21 concur: total 1552.322319ms per 155.232232us CPU 23 concur: total 1552.921723ms per 155.292172us CPU 3 concur: total 1553.085462ms per 155.308546us CPU 45 concur: total 1553.360574ms per 155.336057us CPU 37 concur: total 1553.736812ms per 155.373681us CPU 69 concur: total 1553.810163ms per 155.381016us CPU 63 concur: total 1554.245252ms per 155.424525us CPU 75 concur: total 1554.587717ms per 155.458772us CPU 47 concur: total 1554.811591ms per 155.481159us CPU 9 concur: total 1555.156676ms per 155.515668us CPU 5 concur: total 1555.240540ms per 155.524054us CPU 27 concur: total 1555.270924ms per 155.527092us CPU 79 concur: total 1555.502580ms per 155.550258us CPU 57 concur: total 1555.650301ms per 155.565030us CPU 43 concur: total 1555.684979ms per 155.568498us CPU 77 concur: total 1555.784989ms per 155.578499us CPU 67 concur: total 1555.892789ms per 155.589279us CPU 15 concur: total 1555.894896ms per 155.589490us CPU 73 concur: total 1556.029098ms per 155.602910us CPU 29 concur: total 1556.136688ms per 155.613669us CPU 59 concur: total 1556.184156ms per 155.618416us CPU 61 concur: total 1556.272459ms per 155.627246us CPU 19 concur: total 1556.316365ms per 155.631637us CPU 39 concur: total 1556.448166ms per 155.644817us CPU 31 concur: total 1556.494722ms per 155.649472us CPU 25 concur: total 1556.874991ms per 155.687499us CPU 13 concur: total 1556.964956ms per 155.696496us CPU 65 concur: total 1557.505884ms per 155.750588us CPU 53 concur: total 1557.670220ms per 155.767022us CPU 71 concur: total 1558.641962ms per 155.864196us CPU 0 concur: total 1559.141537ms per 155.914154us CPU 51 concur: total 1559.180879ms per 155.918088us CPU 11 times: 10000 threads: 80 cpus: 80 2) Run with a single sysfs file path on 80 cpu machine, perf graphs in base-missing-cpu-80-perf.txt and patched-missing-cpu-80-perf.txt. Base (5.12.3, unpatched) ------------------------ single: total 24.746542ms per 2.474654us concur: total 11642.525326ms per 1164.252533us CPU 41 concur: total 11753.266354ms per 1175.326635us CPU 21 concur: total 11882.784250ms per 1188.278425us CPU 5 concur: total 11897.657687ms per 1189.765769us CPU 13 concur: total 11915.176939ms per 1191.517694us CPU 61 concur: total 12032.739153ms per 1203.273915us CPU 45 concur: total 12095.349631ms per 1209.534963us CPU 33 concur: total 12147.225465ms per 1214.722546us CPU 65 concur: total 12236.584495ms per 1223.658449us CPU 73 concur: total 12273.499836ms per 1227.349984us CPU 25 concur: total 12327.559782ms per 1232.755978us CPU 1 concur: total 12339.221934ms per 1233.922193us CPU 53 concur: total 12592.935435ms per 1259.293543us CPU 69 concur: total 12751.932850ms per 1275.193285us CPU 57 concur: total 12789.601281ms per 1278.960128us CPU 49 concur: total 12800.329994ms per 1280.032999us CPU 15 concur: total 12899.047414ms per 1289.904741us CPU 29 concur: total 12950.772402ms per 1295.077240us CPU 55 concur: total 13031.263191ms per 1303.126319us CPU 17 concur: total 13077.573490ms per 1307.757349us CPU 59 concur: total 13086.450703ms per 1308.645070us CPU 19 concur: total 13112.144105ms per 1311.214410us CPU 47 concur: total 13167.152306ms per 1316.715231us CPU 32 concur: total 13203.910956ms per 1320.391096us CPU 9 concur: total 13230.538364ms per 1323.053836us CPU 60 concur: total 13232.286187ms per 1323.228619us CPU 23 concur: total 13244.948925ms per 1324.494893us CPU 75 concur: total 13260.586625ms per 1326.058663us CPU 24 concur: total 13279.711923ms per 1327.971192us CPU 4 concur: total 13290.308549ms per 1329.030855us CPU 64 concur: total 13297.234721ms per 1329.723472us CPU 37 concur: total 13297.585100ms per 1329.758510us CPU 7 concur: total 13300.929348ms per 1330.092935us CPU 20 concur: total 13311.528772ms per 1331.152877us CPU 46 concur: total 13315.521790ms per 1331.552179us CPU 52 concur: total 13331.269808ms per 1333.126981us CPU 28 concur: total 13333.563808ms per 1333.356381us CPU 26 concur: total 13334.923225ms per 1333.492323us CPU 39 concur: total 13340.811453ms per 1334.081145us CPU 72 concur: total 13346.192625ms per 1334.619263us CPU 63 concur: total 13349.415339ms per 1334.941534us CPU 68 concur: total 13352.414423ms per 1335.241442us CPU 0 concur: total 13354.401586ms per 1335.440159us CPU 44 concur: total 13356.828605ms per 1335.682861us CPU 54 concur: total 13358.754397ms per 1335.875440us CPU 16 concur: total 13362.014261ms per 1336.201426us CPU 12 concur: total 13364.189431ms per 1336.418943us CPU 6 concur: total 13364.252331ms per 1336.425233us CPU 67 concur: total 13365.159491ms per 1336.515949us CPU 76 concur: total 13369.198367ms per 1336.919837us CPU 48 concur: total 13369.574959ms per 1336.957496us CPU 36 concur: total 13377.299530ms per 1337.729953us CPU 40 concur: total 13377.717747ms per 1337.771775us CPU 35 concur: total 13377.886941ms per 1337.788694us CPU 56 concur: total 13382.748789ms per 1338.274879us CPU 66 concur: total 13384.125526ms per 1338.412553us CPU 79 concur: total 13384.216216ms per 1338.421622us CPU 58 concur: total 13388.371680ms per 1338.837168us CPU 18 concur: total 13393.289323ms per 1339.328932us CPU 10 concur: total 13394.423134ms per 1339.442313us CPU 8 concur: total 13394.537986ms per 1339.453799us CPU 14 concur: total 13396.152597ms per 1339.615260us CPU 30 concur: total 13397.312727ms per 1339.731273us CPU 34 concur: total 13397.555389ms per 1339.755539us CPU 70 concur: total 13398.055759ms per 1339.805576us CPU 78 concur: total 13399.219289ms per 1339.921929us CPU 77 concur: total 13401.160948ms per 1340.116095us CPU 38 concur: total 13401.177905ms per 1340.117790us CPU 27 concur: total 13401.652556ms per 1340.165256us CPU 50 concur: total 13403.311058ms per 1340.331106us CPU 22 concur: total 13406.279259ms per 1340.627926us CPU 42 concur: total 13406.714708ms per 1340.671471us CPU 2 concur: total 13409.186649ms per 1340.918665us CPU 74 concur: total 13409.591594ms per 1340.959159us CPU 62 concur: total 13410.246135ms per 1341.024613us CPU 31 concur: total 13412.007054ms per 1341.200705us CPU 11 concur: total 13412.140675ms per 1341.214068us CPU 71 concur: total 13412.737053ms per 1341.273705us CPU 51 concur: total 13413.214418ms per 1341.321442us CPU 3 concur: total 13414.303830ms per 1341.430383us CPU 43 times: 10000 threads: 80 cpus: 80 patched (5.12.3) ---------------- single: total 23.208077ms per 2.320808us concur: total 1206.802099ms per 120.680210us CPU 22 concur: total 1208.930779ms per 120.893078us CPU 8 concur: total 1211.247205ms per 121.124721us CPU 34 concur: total 1212.998353ms per 121.299835us CPU 62 concur: total 1213.389780ms per 121.338978us CPU 28 concur: total 1215.414555ms per 121.541455us CPU 48 concur: total 1218.962627ms per 121.896263us CPU 36 concur: total 1219.112096ms per 121.911210us CPU 74 concur: total 1219.292732ms per 121.929273us CPU 68 concur: total 1219.454262ms per 121.945426us CPU 2 concur: total 1219.937964ms per 121.993796us CPU 20 concur: total 1221.773152ms per 122.177315us CPU 42 concur: total 1222.383925ms per 122.238393us CPU 16 concur: total 1222.753728ms per 122.275373us CPU 14 concur: total 1222.824826ms per 122.282483us CPU 0 concur: total 1224.441811ms per 122.444181us CPU 56 concur: total 1224.779489ms per 122.477949us CPU 6 concur: total 1224.973746ms per 122.497375us CPU 40 concur: total 1225.042053ms per 122.504205us CPU 54 concur: total 1225.513107ms per 122.551311us CPU 4 concur: total 1225.848993ms per 122.584899us CPU 76 concur: total 1226.191945ms per 122.619195us CPU 32 concur: total 1226.556633ms per 122.655663us CPU 38 concur: total 1226.642992ms per 122.664299us CPU 60 concur: total 1227.444816ms per 122.744482us CPU 46 concur: total 1227.981028ms per 122.798103us CPU 18 concur: total 1228.193518ms per 122.819352us CPU 44 concur: total 1228.550486ms per 122.855049us CPU 26 concur: total 1228.840427ms per 122.884043us CPU 24 concur: total 1229.017209ms per 122.901721us CPU 78 concur: total 1229.724519ms per 122.972452us CPU 72 concur: total 1229.878627ms per 122.987863us CPU 12 concur: total 1230.770167ms per 123.077017us CPU 66 concur: total 1231.876743ms per 123.187674us CPU 58 concur: total 1232.688921ms per 123.268892us CPU 64 concur: total 1233.311151ms per 123.331115us CPU 52 concur: total 1236.349393ms per 123.634939us CPU 30 concur: total 1240.084640ms per 124.008464us CPU 70 concur: total 1247.767398ms per 124.776740us CPU 10 concur: total 1248.471436ms per 124.847144us CPU 50 concur: total 1249.292940ms per 124.929294us CPU 39 concur: total 1295.617635ms per 129.561764us CPU 23 concur: total 1297.170489ms per 129.717049us CPU 9 concur: total 1297.964528ms per 129.796453us CPU 63 concur: total 1299.431947ms per 129.943195us CPU 35 concur: total 1299.701030ms per 129.970103us CPU 49 concur: total 1299.703983ms per 129.970398us CPU 29 concur: total 1300.535158ms per 130.053516us CPU 3 concur: total 1300.902632ms per 130.090263us CPU 1 concur: total 1301.034574ms per 130.103457us CPU 5 concur: total 1301.105484ms per 130.110548us CPU 17 concur: total 1301.141575ms per 130.114158us CPU 75 concur: total 1301.499277ms per 130.149928us CPU 69 concur: total 1301.970890ms per 130.197089us CPU 41 concur: total 1302.582629ms per 130.258263us CPU 57 concur: total 1302.751012ms per 130.275101us CPU 43 concur: total 1302.816857ms per 130.281686us CPU 45 concur: total 1302.909810ms per 130.290981us CPU 15 concur: total 1303.018114ms per 130.301811us CPU 21 concur: total 1303.023366ms per 130.302337us CPU 7 concur: total 1303.218080ms per 130.321808us CPU 37 concur: total 1303.578443ms per 130.357844us CPU 27 concur: total 1303.954501ms per 130.395450us CPU 47 concur: total 1304.038096ms per 130.403810us CPU 55 concur: total 1304.040952ms per 130.404095us CPU 33 concur: total 1304.156534ms per 130.415653us CPU 77 concur: total 1304.188698ms per 130.418870us CPU 19 concur: total 1304.792850ms per 130.479285us CPU 67 concur: total 1304.894882ms per 130.489488us CPU 25 concur: total 1304.996763ms per 130.499676us CPU 61 concur: total 1305.107675ms per 130.510768us CPU 13 concur: total 1305.370941ms per 130.537094us CPU 73 concur: total 1305.487118ms per 130.548712us CPU 59 concur: total 1305.654535ms per 130.565453us CPU 65 concur: total 1305.891900ms per 130.589190us CPU 53 concur: total 1306.513791ms per 130.651379us CPU 31 concur: total 1307.221019ms per 130.722102us CPU 71 concur: total 1309.522870ms per 130.952287us CPU 11 concur: total 1309.526910ms per 130.952691us CPU 51 concur: total 1316.416007ms per 131.641601us CPU 79 times: 10000 threads: 80 cpus: 80 Ian
