Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758862AbZF2OAc (ORCPT ); Mon, 29 Jun 2009 10:00:32 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752520AbZF2OAV (ORCPT ); Mon, 29 Jun 2009 10:00:21 -0400 Received: from mail-ew0-f210.google.com ([209.85.219.210]:42119 "EHLO mail-ew0-f210.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751906AbZF2OAS (ORCPT ); Mon, 29 Jun 2009 10:00:18 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=ehYxeuosUW1XePYvVTqHlnBV2BBchKIdWrp6u9Z3b9qtNQQn4RQGwZooaJT3Dgpcag HVuAp1BiGuQo1YiVb0s0RPwnnrJnpd/uolcf0MVmaJE/ilC23ORGolCk4HMIoL7k/Mz5 ldRXNwTuNiGyULPBPwcZMgxFrMN90zSMfRxPk= MIME-Version: 1.0 In-Reply-To: <4A48BBF9.6050408@vlnb.net> References: <6.0.0.20.2.20090601095926.06ee98d8@172.19.0.2> <20090606224538.GA6173@localhost> <20090618120436.ad3196e3.akpm@linux-foundation.org> <20090620035504.GA19516@localhost> <4A3CD62B.1020407@vlnb.net> <20090629093423.GB1315@localhost> <4A489DAC.7000007@vlnb.net> <20090629125434.GA8416@localhost> <4A48BBF9.6050408@vlnb.net> Date: Mon, 29 Jun 2009 16:00:20 +0200 Message-ID: Subject: Re: [RESEND] [PATCH] readahead:add blk_run_backing_dev From: Ronald Moesbergen To: Vladislav Bolkhovitin Cc: Wu Fengguang , Andrew Morton , "kosaki.motohiro@jp.fujitsu.com" , "Alan.Brunelle@hp.com" , "hifumi.hisashi@oss.ntt.co.jp" , "linux-kernel@vger.kernel.org" , "linux-fsdevel@vger.kernel.org" , "jens.axboe@oracle.com" , "randy.dunlap@oracle.com" , Bart Van Assche Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 10878 Lines: 201 ... tests ... > We started with 2.6.29, so why not complete with it (to save additional > Ronald's effort to move on 2.6.30)? > >>> 2. Default vanilla 2.6.29 kernel, 512 KB read-ahead, the rest is default >> >> How about 2MB RAID readahead size? That transforms into about 512KB >> per-disk readahead size. > > OK. Ronald, can you 4 more test cases, please: > > 7. Default vanilla 2.6.29 kernel, 2MB read-ahead, the rest is default > > 8. Default vanilla 2.6.29 kernel, 2MB read-ahead, 64 KB > max_sectors_kb, the rest is default > > 9. Patched by the Fengguang's patch vanilla 2.6.29 kernel, 2MB > read-ahead, the rest is default > > 10. Patched by the Fengguang's patch vanilla 2.6.29 kernel, 2MB > read-ahead, 64 KB max_sectors_kb, the rest is default The results: Unpatched, 128KB readahead, 512 max_sectors_kb blocksize R R R R(avg, R(std R (bytes) (s) (s) (s) MB/s) ,MB/s) (IOPS) 67108864 5.621 5.503 5.419 185.744 2.780 2.902 33554432 6.628 5.897 6.242 164.068 7.827 5.127 16777216 7.312 7.165 7.614 139.148 3.501 8.697 8388608 8.719 8.408 8.694 119.003 1.973 14.875 4194304 11.836 12.192 12.137 84.958 1.111 21.239 2097152 13.452 13.992 14.035 74.090 1.442 37.045 1048576 12.759 11.996 12.195 83.194 2.152 83.194 524288 11.895 12.297 12.587 83.570 1.945 167.140 262144 7.325 7.285 7.444 139.304 1.272 557.214 131072 7.992 8.832 7.952 124.279 5.901 994.228 65536 10.940 10.062 10.122 98.847 3.715 1581.545 32768 9.973 10.012 9.945 102.640 0.281 3284.493 16384 11.377 10.538 10.692 94.316 3.100 6036.222 Unpatched, 512KB readahead, 512 max_sectors_kb blocksize R R R R(avg, R(std R (bytes) (s) (s) (s) MB/s) ,MB/s) (IOPS) 67108864 5.032 4.770 5.265 204.228 8.271 3.191 33554432 5.569 5.712 5.863 179.263 3.755 5.602 16777216 6.661 6.857 6.550 153.132 2.888 9.571 8388608 8.022 8.000 7.978 127.998 0.288 16.000 4194304 10.959 11.579 12.208 88.586 3.902 22.146 2097152 13.692 12.670 12.625 78.906 2.914 39.453 1048576 11.120 11.144 10.878 92.703 1.018 92.703 524288 11.234 10.915 11.374 91.667 1.587 183.334 262144 6.848 6.678 6.795 151.191 1.594 604.763 131072 7.393 7.367 7.337 139.025 0.428 1112.202 65536 10.003 10.919 10.015 99.466 4.019 1591.462 32768 10.117 10.124 10.169 101.018 0.229 3232.574 16384 11.614 11.027 11.029 91.293 2.207 5842.771 Unpatched, 2MB readahead, 512 max_sectors_kb blocksize R R R R(avg, R(std R (bytes) (s) (s) (s) MB/s) ,MB/s) (IOPS) 67108864 5.268 5.316 5.418 191.996 2.241 3.000 33554432 5.831 6.459 6.110 167.259 6.977 5.227 16777216 7.313 7.069 7.197 142.385 1.972 8.899 8388608 8.657 8.500 8.498 119.754 1.039 14.969 4194304 11.846 12.116 11.801 85.911 0.994 21.478 2097152 12.917 13.652 13.100 77.484 1.808 38.742 1048576 9.544 10.667 10.807 99.345 5.640 99.345 524288 11.736 7.171 6.599 128.410 29.539 256.821 262144 7.530 7.403 7.416 137.464 1.053 549.857 131072 8.741 8.002 8.022 124.256 5.029 994.051 65536 10.701 10.138 10.090 99.394 2.629 1590.311 32768 9.978 9.950 9.934 102.875 0.188 3291.994 16384 11.435 10.823 10.907 92.684 2.234 5931.749 Unpatched, 512KB readahead, 64 max_sectors_kb blocksize R R R R(avg, R(std R (bytes) (s) (s) (s) MB/s) ,MB/s) (IOPS) 67108864 3.994 3.991 4.123 253.774 3.838 3.965 33554432 4.100 4.329 4.161 244.111 5.569 7.628 16777216 5.476 4.835 5.079 200.148 10.177 12.509 8388608 5.484 5.258 5.227 192.470 4.084 24.059 4194304 6.429 6.458 6.435 158.989 0.315 39.747 2097152 7.219 7.744 7.306 138.081 4.187 69.040 1048576 6.850 6.897 6.776 149.696 1.089 149.696 524288 6.406 6.393 6.469 159.439 0.814 318.877 262144 6.865 7.508 6.861 144.931 6.041 579.726 131072 8.435 8.482 8.307 121.792 1.076 974.334 65536 9.616 9.610 10.262 104.279 3.176 1668.462 32768 9.682 9.932 10.015 103.701 1.497 3318.428 16384 10.962 10.852 11.565 92.106 2.547 5894.813 Unpatched, 2MB readahead, 64 max_sectors_kb blocksize R R R R(avg, R(std R (bytes) (s) (s) (s) MB/s) ,MB/s) (IOPS) 67108864 3.730 3.714 3.914 270.615 6.396 4.228 33554432 4.445 3.999 3.989 247.710 12.276 7.741 16777216 4.763 4.712 4.709 216.590 1.122 13.537 8388608 5.001 5.086 5.229 200.649 3.673 25.081 4194304 6.365 6.362 6.905 156.710 5.948 39.178 2097152 7.390 7.367 7.270 139.470 0.992 69.735 1048576 7.038 7.050 7.090 145.052 0.456 145.052 524288 6.862 7.167 7.278 144.272 3.617 288.544 262144 7.266 7.313 7.265 140.635 0.436 562.540 131072 8.677 8.735 8.821 117.108 0.790 936.865 65536 10.865 10.040 10.038 99.418 3.658 1590.685 32768 10.167 10.130 10.177 100.805 0.201 3225.749 16384 11.643 11.017 11.103 91.041 2.203 5826.629 Patched, 128KB readahead, 512 max_sectors_kb blocksize R R R R(avg, R(std R (bytes) (s) (s) (s) MB/s) ,MB/s) (IOPS) 67108864 5.670 5.188 5.636 186.555 7.671 2.915 33554432 6.069 5.971 6.141 168.992 1.954 5.281 16777216 7.821 7.501 7.372 135.451 3.340 8.466 8388608 9.147 8.618 9.000 114.849 2.908 14.356 4194304 12.199 12.914 12.381 81.981 1.964 20.495 2097152 13.449 13.891 14.288 73.842 1.828 36.921 1048576 11.890 12.182 11.519 86.360 1.984 86.360 524288 11.899 12.706 12.135 83.678 2.287 167.357 262144 7.460 7.559 7.563 136.041 0.864 544.164 131072 7.987 8.003 8.530 125.403 3.792 1003.220 65536 10.179 10.119 10.131 100.957 0.255 1615.312 32768 9.899 9.923 10.589 101.114 3.121 3235.656 16384 10.849 10.835 10.876 94.351 0.150 6038.474 Patched, 512KB readahead, 512 max_sectors_kb blocksize R R R R(avg, R(std R (bytes) (s) (s) (s) MB/s) ,MB/s) (IOPS) 67108864 5.062 5.111 5.083 201.358 0.795 3.146 33554432 5.589 5.713 5.657 181.165 1.625 5.661 16777216 6.337 7.220 6.457 154.002 8.690 9.625 8388608 7.952 7.880 7.527 131.588 3.192 16.448 4194304 10.695 11.224 10.736 94.119 2.047 23.530 2097152 10.898 12.072 12.358 87.215 4.839 43.607 1048576 10.890 11.347 9.290 98.166 8.664 98.166 524288 10.898 11.032 10.887 93.611 0.560 187.223 262144 6.714 7.230 6.804 148.219 4.724 592.875 131072 7.325 7.342 7.363 139.441 0.295 1115.530 65536 9.773 9.988 10.592 101.327 3.417 1621.227 32768 10.031 9.995 10.086 102.019 0.377 3264.620 16384 11.041 10.987 11.564 91.502 2.093 5856.144 Patched, 2MB readahead, 512 max_sectors_kb blocksize R R R R(avg, R(std R (bytes) (s) (s) (s) MB/s) ,MB/s) (IOPS) 67108864 4.970 5.097 5.188 201.435 3.559 3.147 33554432 5.588 5.793 5.169 186.042 8.923 5.814 16777216 6.151 6.414 6.526 161.012 4.027 10.063 8388608 7.836 7.299 7.475 135.980 3.989 16.998 4194304 11.792 10.964 10.158 93.683 5.706 23.421 2097152 11.225 11.492 11.357 90.162 0.866 45.081 1048576 12.017 11.258 11.432 88.580 2.449 88.580 524288 5.974 10.883 11.840 117.323 38.361 234.647 262144 6.774 6.765 6.526 153.155 2.661 612.619 131072 8.036 7.324 7.341 135.579 5.766 1084.633 65536 9.964 10.595 9.999 100.608 2.806 1609.735 32768 10.132 10.036 10.190 101.197 0.637 3238.308 16384 11.133 11.568 11.036 91.093 1.850 5829.981 Patched, 512KB readahead, 64 max_sectors_kb blocksize R R R R(avg, R(std R (bytes) (s) (s) (s) MB/s) ,MB/s) (IOPS) 67108864 3.722 3.698 3.721 275.759 0.809 4.309 33554432 4.058 3.849 3.957 259.063 5.580 8.096 16777216 4.601 4.613 4.738 220.212 2.913 13.763 8388608 5.039 5.534 5.017 197.452 8.791 24.682 4194304 6.302 6.270 6.282 162.942 0.341 40.735 2097152 7.314 7.302 7.069 141.700 2.233 70.850 1048576 6.881 7.655 6.909 143.597 6.951 143.597 524288 7.163 7.025 6.951 145.344 1.803 290.687 262144 7.315 7.233 7.299 140.621 0.689 562.482 131072 9.292 8.756 8.807 114.475 3.036 915.803 65536 9.942 9.985 9.960 102.787 0.181 1644.598 32768 10.721 10.091 10.192 99.154 2.605 3172.935 16384 11.049 11.016 11.065 92.727 0.169 5934.531 Patched, 2MB readahead, 64 max_sectors_kb blocksize R R R R(avg, R(std R (bytes) (s) (s) (s) MB/s) ,MB/s) (IOPS) 67108864 3.697 3.819 3.741 272.931 3.661 4.265 33554432 3.951 3.905 4.038 258.320 3.586 8.073 16777216 5.595 5.182 4.864 197.044 11.236 12.315 8388608 5.267 5.156 5.116 197.725 2.431 24.716 4194304 6.411 6.335 6.290 161.389 1.267 40.347 2097152 7.329 7.663 7.462 136.860 2.502 68.430 1048576 7.225 7.077 7.215 142.784 1.352 142.784 524288 6.903 7.015 7.095 146.210 1.647 292.419 262144 7.365 7.926 7.278 136.309 5.076 545.237 131072 8.796 8.819 8.814 116.233 0.130 929.862 65536 9.998 10.609 9.995 100.464 2.786 1607.423 32768 10.161 10.124 10.246 100.623 0.505 3219.943 Regards, Ronald. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/