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Message-ID: <CAJZ5v0guCNRFcU1Xa6ekpWxguKmUcHNvfSdY2Wph13mFPMcs0w@mail.gmail.com> Date: Mon, 20 Jan 2025 17:24:47 +0100 From: "Rafael J. Wysocki" <rafael@...nel.org> To: Christian Loehle <christian.loehle@....com> Cc: "Rafael J. Wysocki" <rjw@...ysocki.net>, Linux PM <linux-pm@...r.kernel.org>, Aboorva Devarajan <aboorvad@...ux.ibm.com>, LKML <linux-kernel@...r.kernel.org>, Daniel Lezcano <daniel.lezcano@...aro.org>, Artem Bityutskiy <artem.bityutskiy@...ux.intel.com> Subject: Re: [PATCH v1 0/9] cpuidle: teo: Cleanups and very frequent wakeups handling update On Wed, Jan 15, 2025 at 3:52 PM Christian Loehle <christian.loehle@....com> wrote: > > On 1/13/25 18:32, Rafael J. Wysocki wrote: > > Hi Everyone, > > > > This supersedes > > > > https://lore.kernel.org/linux-pm/4953183.GXAFRqVoOG@rjwysocki.net/ > > > > but because the majority of patches in it are new, I've decided to count > > version numbers back from 1. > > > > This addresses a relatively recently added inconsistency in behavior of the teo > > governor regarding the handling of very frequent wakeups handling (patch [7/9]) > > and makes some other changes that may be regarded as cleanups. > > > > Please review. > > Hi Rafael, > that looks promising. I'll review the individual patches in detail now, but > I let a few tests run overnight and can report that there's no significant > behaviour change with the series on an arm64 (no polling state, rk3399), which > is my expected result. > > I'll get something running on a system with a polling state as well. > (I don't have a POWER system, so that will just be x86, adding Aboorva.) > > Tested-by: Christian Loehle <christian.loehle@....com> > for the entire series Thanks, much appreciated! > I'll just dump some of the raw results here for reference. > teo-X is teo with everything up to X/9 applied. teo-m is mainline, teo is > the entire series (equivalent to teo-9). > > Everything is done with fio direct random4k read. Range of real devices > with varying latency, mapper/slow is 51ms timer delay, nullb0 is > essentially CPU-bound, few intercepts expected. > -- > > device gov iter iops idles idle_misses idle_miss_ratio belows aboves > mmcblk1 menu 0 1284 344126 106309 0.309 89264 17045 > mmcblk1 menu 1 1340 358646 109469 0.305 91726 17743 > mmcblk1 menu 2 1316 348812 106773 0.306 89845 16928 > mmcblk1 teo 0 2023 559551 30053 0.054 2962 27091 > mmcblk1 teo 1 2007 548422 25816 0.047 2113 23703 > mmcblk1 teo 2 2010 557120 29434 0.053 2782 26652 > mmcblk1 teo-m 0 2010 542790 23336 0.043 1720 21616 > mmcblk1 teo-m 1 2009 554912 29239 0.053 2750 26489 > mmcblk1 teo-m 2 2013 548384 26444 0.048 2180 24264 > mmcblk1 teo-1 0 2030 524056 3571 0.007 610 2961 > mmcblk1 teo-1 1 2022 559304 27074 0.048 3373 23701 > mmcblk1 teo-1 2 2009 554744 27406 0.049 2964 24442 > mmcblk1 teo-2 0 2012 542886 18233 0.034 2140 16093 > mmcblk1 teo-2 1 2010 554094 27680 0.050 2957 24723 > mmcblk1 teo-2 2 2010 555222 28549 0.051 3085 25464 > mmcblk1 teo-3 0 2011 556816 28708 0.052 3076 25632 > mmcblk1 teo-3 1 2015 546998 20280 0.037 2414 17866 > mmcblk1 teo-3 2 2020 549758 20802 0.038 2662 18140 > mmcblk1 teo-4 0 2026 536464 11692 0.022 1457 10235 > mmcblk1 teo-4 1 2031 557978 25464 0.046 2928 22536 > mmcblk1 teo-4 2 2012 553812 26323 0.048 2943 23380 > mmcblk1 teo-5 0 2021 557966 3454 0.006 3003 451 > mmcblk1 teo-5 1 2027 546630 18400 0.034 2303 16097 > mmcblk1 teo-5 2 2012 554390 28013 0.051 2990 25023 > mmcblk1 teo-6 0 2037 539956 12764 0.024 1701 11063 > mmcblk1 teo-6 1 2019 556202 29074 0.052 3071 26003 > mmcblk1 teo-6 2 2017 555004 26814 0.048 2869 23945 > mmcblk1 teo-7 0 2028 545802 23806 0.044 1625 22181 > mmcblk1 teo-7 1 2019 557030 29913 0.054 2990 26923 > mmcblk1 teo-7 2 2018 553236 28534 0.052 2657 25877 > mmcblk1 teo-8 0 2018 554662 28595 0.052 2660 25935 > mmcblk1 teo-8 1 2014 554646 28947 0.052 2721 26226 > mmcblk1 teo-8 2 2014 543828 29379 0.054 2915 26464 > mmcblk1 teo-9 0 2013 555356 28867 0.052 2719 26148 > mmcblk1 teo-9 1 2015 557254 29709 0.053 2836 26873 > mmcblk1 teo-9 2 2030 559272 29321 0.052 3052 26269 > mmcblk2 menu 0 2885 434990 140864 0.324 123507 17357 > mmcblk2 menu 1 2766 450918 152931 0.339 135384 17547 > mmcblk2 menu 2 2960 407712 125573 0.308 109224 16349 > mmcblk2 teo 0 5677 741006 24131 0.033 2233 21898 > mmcblk2 teo 1 5652 714494 24412 0.034 2680 21732 > mmcblk2 teo 2 5660 752410 20497 0.027 1809 18688 > mmcblk2 teo-m 0 5683 855232 23454 0.027 1934 21520 > mmcblk2 teo-m 1 5588 517234 32016 0.062 5443 26573 > mmcblk2 teo-m 2 5654 668648 29108 0.044 3171 25937 > mmcblk2 teo-1 0 5666 773452 25740 0.033 3430 22310 > mmcblk2 teo-1 1 5638 668190 27619 0.041 4150 23469 > mmcblk2 teo-1 2 5689 866340 28191 0.033 3122 25069 > mmcblk2 teo-2 0 5769 859462 2116 0.002 1835 281 > mmcblk2 teo-2 1 5577 611956 25490 0.042 8647 16843 > mmcblk2 teo-2 2 5665 721308 25826 0.036 2876 22950 > mmcblk2 teo-3 0 5677 805946 30345 0.038 3877 26468 > mmcblk2 teo-3 1 5752 855840 14392 0.017 2588 11804 > mmcblk2 teo-3 2 5740 825580 27403 0.033 3750 23653 > mmcblk2 teo-4 0 5664 777848 3435 0.004 3229 206 > mmcblk2 teo-4 1 5660 728926 25796 0.035 2871 22925 > mmcblk2 teo-4 2 5689 774342 7844 0.010 2838 5006 > mmcblk2 teo-5 0 5672 781618 2733 0.003 2551 182 > mmcblk2 teo-5 1 5693 866530 28658 0.033 3332 25326 > mmcblk2 teo-5 2 5687 837294 12172 0.015 2338 9834 > mmcblk2 teo-6 0 5859 892798 5226 0.006 3566 1660 > mmcblk2 teo-6 1 5696 864197 24962 0.029 2796 22166 > mmcblk2 teo-6 2 5671 788200 26612 0.034 3157 23455 > mmcblk2 teo-7 0 5617 525864 30143 0.057 3739 26404 > mmcblk2 teo-7 1 5732 802794 25553 0.032 3240 22313 > mmcblk2 teo-7 2 5838 858620 12661 0.015 188 12473 > mmcblk2 teo-8 0 5696 780894 24440 0.031 2928 21512 > mmcblk2 teo-8 1 5868 862794 12978 0.015 187 12791 > mmcblk2 teo-8 2 5607 660124 31632 0.048 6728 24904 > mmcblk2 teo-9 0 5652 669318 28330 0.042 2692 25638 > mmcblk2 teo-9 1 5657 710892 29291 0.041 3233 26058 > mmcblk2 teo-9 2 5594 740988 37086 0.050 10275 26811 > nvme0n1 menu 0 4775 384186 70675 0.184 54346 16329 > nvme0n1 menu 1 5211 409374 69545 0.170 53484 16061 > nvme0n1 menu 2 7213 535088 81312 0.152 64253 17059 > nvme0n1 teo 0 10655 754882 29476 0.039 2960 26516 > nvme0n1 teo 1 10627 755322 29324 0.039 3011 26313 > nvme0n1 teo 2 10559 749498 29850 0.040 3265 26585 > nvme0n1 teo-m 0 10353 738802 29937 0.041 2996 26941 > nvme0n1 teo-m 1 10629 748148 27076 0.036 2349 24727 > nvme0n1 teo-m 2 10477 743256 28193 0.038 2645 25548 > nvme0n1 teo-1 0 10947 772905 24896 0.032 3150 21746 > nvme0n1 teo-1 1 10412 732894 21868 0.030 2423 19445 > nvme0n1 teo-1 2 10530 748377 26338 0.035 3479 22859 > nvme0n1 teo-2 0 10570 751961 5195 0.007 2853 2342 > nvme0n1 teo-2 1 10482 732428 18667 0.025 2102 16565 > nvme0n1 teo-2 2 10829 768292 26400 0.034 3189 23211 > nvme0n1 teo-3 0 10493 746638 26371 0.035 3320 23051 > nvme0n1 teo-3 1 10445 742924 27871 0.038 3027 24844 > nvme0n1 teo-3 2 10920 775112 25646 0.033 3520 22126 > nvme0n1 teo-4 0 10500 734792 18125 0.025 2283 15842 > nvme0n1 teo-4 1 11091 783828 25904 0.033 3031 22873 > nvme0n1 teo-4 2 10413 736248 23786 0.032 2660 21126 > nvme0n1 teo-5 0 10479 744340 26933 0.036 3096 23837 > nvme0n1 teo-5 1 10740 764188 27065 0.035 3062 24003 > nvme0n1 teo-5 2 10500 747060 25962 0.035 3233 22729 > nvme0n1 teo-6 0 10715 757772 2186 0.003 1872 314 > nvme0n1 teo-6 1 10485 734878 17620 0.024 2174 15446 > nvme0n1 teo-6 2 10478 744106 26909 0.036 3007 23902 > nvme0n1 teo-7 0 10549 750022 30416 0.041 3320 27096 > nvme0n1 teo-7 1 10611 752182 29877 0.040 3332 26545 > nvme0n1 teo-7 2 11170 791572 30790 0.039 3453 27337 > nvme0n1 teo-8 0 10622 752523 29002 0.039 2745 26257 > nvme0n1 teo-8 1 10424 739904 28641 0.039 2756 25885 > nvme0n1 teo-8 2 10533 731440 22101 0.030 1280 20821 > nvme0n1 teo-9 0 10367 727768 24895 0.034 1820 23075 > nvme0n1 teo-9 1 10815 766230 29378 0.038 3136 26242 > nvme0n1 teo-9 2 10426 739224 28173 0.038 2563 25610 > sda menu 0 872 526240 175645 0.334 159373 16272 > sda menu 1 900 536434 188122 0.351 170749 17373 > sda menu 2 901 534826 189778 0.355 171745 18033 > sda teo 0 1687 999108 16015 0.016 1249 14766 > sda teo 1 1668 1007551 31316 0.031 5809 25507 > sda teo 2 1682 985830 18784 0.019 1003 17781 > sda teo-m 0 1676 969984 25825 0.027 3191 22634 > sda teo-m 1 1682 995266 30340 0.030 4040 26300 > sda teo-m 2 1681 940562 20830 0.022 1508 19322 > sda teo-1 0 1680 996214 15553 0.016 2192 13361 > sda teo-1 1 1674 1050168 28033 0.027 4011 24022 > sda teo-1 2 1665 808202 35292 0.044 8873 26419 > sda teo-2 0 1689 1013360 546 0.001 243 303 > sda teo-2 1 1672 1033806 29432 0.028 4363 25069 > sda teo-2 2 1667 1046100 31110 0.030 6395 24715 > sda teo-3 0 1625 922694 40891 0.044 22925 17966 > sda teo-3 1 1670 894480 27946 0.031 3045 24901 > sda teo-3 2 1658 1009366 28514 0.028 8887 19627 > sda teo-4 0 1674 977280 3605 0.004 3279 326 > sda teo-4 1 1677 960990 2861 0.003 1058 1803 > sda teo-4 2 1660 1016592 33894 0.033 7687 26207 > sda teo-5 0 1678 1033470 16996 0.016 2163 14833 > sda teo-5 1 1667 873077 25011 0.029 4393 20618 > sda teo-5 2 1672 1042020 24589 0.024 3858 20731 > sda teo-6 0 1680 962686 7255 0.008 1797 5458 > sda teo-6 1 1682 1055472 28602 0.027 5081 23521 > sda teo-6 2 1675 989244 19110 0.019 5620 13490 > sda teo-7 0 1618 1001000 51178 0.051 26011 25167 > sda teo-7 1 1666 1047310 34032 0.032 6520 27512 > sda teo-7 2 1676 982046 28788 0.029 2836 25952 > sda teo-8 0 1618 975930 52929 0.054 26386 26543 > sda teo-8 1 1678 1023796 16182 0.016 2191 13991 > sda teo-8 2 1633 981693 43520 0.044 18782 24738 > sda teo-9 0 1661 1029494 32423 0.031 5855 26568 > sda teo-9 1 1678 969400 17843 0.018 2763 15080 > sda teo-9 2 1679 1055060 32288 0.031 5607 26681 > mtdblock3 menu 0 180 278442 80547 0.289 65714 14833 > mtdblock3 menu 1 167 379840 109168 0.287 93460 15708 > mtdblock3 menu 2 155 373948 126262 0.338 107799 18463 > mtdblock3 teo 0 256 663190 29333 0.044 4836 24497 > mtdblock3 teo 1 257 808114 29394 0.036 2742 26652 > mtdblock3 teo 2 257 456150 25812 0.057 2468 23344 > mtdblock3 teo-m 0 257 624492 24678 0.040 2326 22352 > mtdblock3 teo-m 1 256 734548 31165 0.042 4307 26858 > mtdblock3 teo-m 2 257 812004 30479 0.038 3510 26969 > mtdblock3 teo-1 0 253 759708 34146 0.045 10081 24065 > mtdblock3 teo-1 1 254 730160 23105 0.032 7156 15949 > mtdblock3 teo-1 2 253 721558 32848 0.046 10028 22820 > mtdblock3 teo-2 0 257 666426 4948 0.007 782 4166 > mtdblock3 teo-2 1 256 682046 25126 0.037 4886 20240 > mtdblock3 teo-2 2 253 639950 36029 0.056 11074 24955 > mtdblock3 teo-3 0 252 709122 37198 0.052 12603 24595 > mtdblock3 teo-3 1 257 709680 30000 0.042 3670 26330 > mtdblock3 teo-3 2 254 540408 32696 0.061 9035 23661 > mtdblock3 teo-4 0 256 442356 28281 0.064 3785 24496 > mtdblock3 teo-4 1 254 588362 16934 0.029 5663 11271 > mtdblock3 teo-4 2 257 628776 28300 0.045 3667 24633 > mtdblock3 teo-5 0 250 762594 43008 0.056 16752 26256 > mtdblock3 teo-5 1 256 586098 29744 0.051 4035 25709 > mtdblock3 teo-5 2 262 903736 375 0.000 139 236 > mtdblock3 teo-6 0 250 795274 42742 0.054 17160 25582 > mtdblock3 teo-6 1 256 800172 28195 0.035 4016 24179 > mtdblock3 teo-6 2 257 523365 26260 0.050 2788 23472 > mtdblock3 teo-7 0 261 944626 31616 0.033 5090 26526 > mtdblock3 teo-7 1 258 647048 28997 0.045 2728 26269 > mtdblock3 teo-7 2 260 901858 18521 0.021 3698 14823 > mtdblock3 teo-8 0 256 914076 27272 0.030 6844 20428 > mtdblock3 teo-8 1 256 809113 31696 0.039 4672 27024 > mtdblock3 teo-8 2 252 798396 40223 0.050 13270 26953 > mtdblock3 teo-9 0 259 726886 30515 0.042 4002 26513 > mtdblock3 teo-9 1 262 892854 9411 0.011 1686 7725 > mtdblock3 teo-9 2 259 909528 16583 0.018 3054 13529 > nullb0 menu 0 107364 86086 20668 0.240 2604 18064 > nullb0 menu 1 107701 85072 20251 0.238 2808 17443 > nullb0 menu 2 107976 85178 20591 0.242 3063 17528 > nullb0 teo 0 105758 84464 28872 0.342 3429 25443 > nullb0 teo 1 106892 87122 30255 0.347 3722 26533 > nullb0 teo 2 107080 83374 27911 0.335 2918 24993 > nullb0 teo-m 0 107702 88337 29824 0.338 2956 26868 > nullb0 teo-m 1 108218 88130 29710 0.337 3038 26672 > nullb0 teo-m 2 106993 86866 30033 0.346 3664 26369 > nullb0 teo-1 0 106416 82936 23635 0.285 3186 20449 > nullb0 teo-1 1 107570 87425 27682 0.317 3220 24462 > nullb0 teo-1 2 107832 75656 19434 0.257 2775 16659 > nullb0 teo-2 0 106320 88182 28603 0.324 3213 25390 > nullb0 teo-2 1 107316 79968 21643 0.271 3081 18562 > nullb0 teo-2 2 108007 84018 25244 0.300 3034 22210 > nullb0 teo-3 0 106989 85160 24558 0.288 3601 20957 > nullb0 teo-3 1 107325 83582 24994 0.299 2963 22031 > nullb0 teo-3 2 107063 77066 18978 0.246 2913 16065 > nullb0 teo-4 0 107990 86156 25012 0.290 3404 21608 > nullb0 teo-4 1 107352 75750 15096 0.199 2671 12425 > nullb0 teo-4 2 107685 87644 26047 0.297 3825 22222 > nullb0 teo-5 0 106687 87788 13428 0.153 2937 10491 > nullb0 teo-5 1 107820 86442 25703 0.297 3686 22017 > nullb0 teo-5 2 108319 81498 22895 0.281 2713 20182 > nullb0 teo-6 0 107784 84364 24239 0.287 3459 20780 > nullb0 teo-6 1 108762 83854 24017 0.286 3289 20728 > nullb0 teo-6 2 106024 88238 27778 0.315 3253 24525 > nullb0 teo-7 0 106041 86354 30076 0.348 3420 26656 > nullb0 teo-7 1 108039 79564 26805 0.337 2924 23881 > nullb0 teo-7 2 107389 88264 30713 0.348 3156 27557 > nullb0 teo-8 0 106465 87924 29679 0.338 2958 26721 > nullb0 teo-8 1 107215 81348 27038 0.332 2916 24122 > nullb0 teo-8 2 108238 87070 29284 0.336 2971 26313 > nullb0 teo-9 0 107220 84508 28894 0.342 3411 25483 > nullb0 teo-9 1 107400 86920 29945 0.345 3579 26366 > nullb0 teo-9 2 107845 87686 30439 0.347 3784 26655 > mapper/dm-slow menu 0 19 85216 20060 0.235 2478 17582 > mapper/dm-slow teo 0 19 86454 28959 0.335 2860 26099 > mapper/dm-slow teo-m 0 19 84740 28056 0.331 2582 25474 > mapper/dm-slow teo-1 0 19 88698 28945 0.326 3210 25735 > mapper/dm-slow teo-2 0 19 83138 24326 0.293 2589 21737 > mapper/dm-slow teo-3 0 19 86416 27274 0.316 2998 24276 > mapper/dm-slow teo-4 0 19 89286 29369 0.329 3151 26218 > mapper/dm-slow teo-5 0 19 88516 29213 0.330 3163 26050 > mapper/dm-slow teo-6 0 19 87896 24675 0.281 3113 21562 > mapper/dm-slow teo-7 0 19 83986 27976 0.333 2788 25188 > mapper/dm-slow teo-8 0 19 88072 29667 0.337 2962 26705 > mapper/dm-slow teo-9 0 19 87260 29428 0.337 2923 26505 >
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