| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Wed, 24 Jun 2015 17:50:28 -0500
From: Nathan Zimmer <nzimmer@....com>
To: Daniel J Blueman <daniel@...ascale.com>
Cc: Mel Gorman <mgorman@...e.de>, nzimmer <nzimmer@....com>,
Andrew Morton <akpm@...ux-foundation.org>,
Waiman Long <waiman.long@...com>,
Dave Hansen <dave.hansen@...el.com>,
Scott Norton <scott.norton@...com>,
Linux-MM <linux-mm@...ck.org>,
LKML <linux-kernel@...r.kernel.org>,
Steffen Persvold <sp@...ascale.com>
Subject: Re: [PATCH] mm: meminit: Finish initialisation of struct pages
before basic setup
My apologies for taking so long to get back to this.
I think I did locate two potential sources of slowdown.
One is the set_cpus_allowed_ptr as I have noted previously.
However I only notice that on the very largest boxes.
I did cobble together a patch that seems to help.
The other spot I suspect is the zone lock in free_one_page.
I haven't been able to give that much thought as of yet though.
Daniel do you mind seeing if the attached patch helps out?
Thanks,
Nate
On Thu, May 14, 2015 at 06:03:03PM +0800, Daniel J Blueman wrote:
> On Thu, May 14, 2015 at 12:31 AM, Mel Gorman <mgorman@...e.de> wrote:
>> On Wed, May 13, 2015 at 10:53:33AM -0500, nzimmer wrote:
>>> I am just noticed a hang on my largest box.
>>> I can only reproduce with large core counts, if I turn down the
>>> number of cpus it doesn't have an issue.
>>>
>>
>> Odd. The number of core counts should make little a difference as only
>> one CPU per node should be in use. Does sysrq+t give any indication how
>> or where it is hanging?
>
> I was seeing the same behaviour of 1000ms increasing to 5500ms [1]; this
> suggests either lock contention or O(n) behaviour.
>
> Nathan, can you check with this ordering of patches from Andrew's cache
> [2]? I was getting hanging until I a found them all.
>
> I'll follow up with timing data.
>
> Thanks,
> Daniel
>
> -- [1]
>
> [ 73.076117] node 2 initialised, 7732961 pages in 1060ms
> [ 73.077184] node 38 initialised, 7732961 pages in 1060ms
> [ 73.079626] node 146 initialised, 7732961 pages in 1050ms
> [ 73.093488] node 62 initialised, 7732961 pages in 1080ms
> [ 73.091557] node 3 initialised, 7732962 pages in 1080ms
> [ 73.100000] node 186 initialised, 7732961 pages in 1040ms
> [ 73.095731] node 4 initialised, 7732961 pages in 1080ms
> [ 73.090289] node 50 initialised, 7732961 pages in 1080ms
> [ 73.094005] node 158 initialised, 7732961 pages in 1050ms
> [ 73.095421] node 159 initialised, 7732962 pages in 1050ms
> [ 73.090324] node 52 initialised, 7732961 pages in 1080ms
> [ 73.099056] node 5 initialised, 7732962 pages in 1080ms
> [ 73.090116] node 160 initialised, 7732961 pages in 1050ms
> [ 73.161051] node 157 initialised, 7732962 pages in 1120ms
> [ 73.193565] node 161 initialised, 7732962 pages in 1160ms
> [ 73.212456] node 26 initialised, 7732961 pages in 1200ms
> [ 73.222904] node 0 initialised, 6686488 pages in 1210ms
> [ 73.242165] node 140 initialised, 7732961 pages in 1210ms
> [ 73.254230] node 156 initialised, 7732961 pages in 1220ms
> [ 73.284634] node 1 initialised, 7732962 pages in 1270ms
> [ 73.305301] node 141 initialised, 7732962 pages in 1280ms
> [ 73.322845] node 28 initialised, 7732961 pages in 1310ms
> [ 73.321757] node 142 initialised, 7732961 pages in 1290ms
> [ 73.327677] node 138 initialised, 7732961 pages in 1300ms
> [ 73.413597] node 176 initialised, 7732961 pages in 1370ms
> [ 73.455552] node 139 initialised, 7732962 pages in 1420ms
> [ 73.475356] node 143 initialised, 7732962 pages in 1440ms
> [ 73.547202] node 32 initialised, 7732961 pages in 1530ms
> [ 73.579591] node 104 initialised, 7732961 pages in 1560ms
> [ 73.618065] node 174 initialised, 7732961 pages in 1570ms
> [ 73.624918] node 178 initialised, 7732961 pages in 1580ms
> [ 73.649024] node 175 initialised, 7732962 pages in 1610ms
> [ 73.654110] node 105 initialised, 7732962 pages in 1630ms
> [ 73.670589] node 106 initialised, 7732961 pages in 1650ms
> [ 73.739682] node 102 initialised, 7732961 pages in 1720ms
> [ 73.769639] node 86 initialised, 7732961 pages in 1750ms
> [ 73.775573] node 44 initialised, 7732961 pages in 1760ms
> [ 73.772955] node 177 initialised, 7732962 pages in 1740ms
> [ 73.804390] node 34 initialised, 7732961 pages in 1790ms
> [ 73.819370] node 30 initialised, 7732961 pages in 1810ms
> [ 73.847882] node 98 initialised, 7732961 pages in 1830ms
> [ 73.867545] node 33 initialised, 7732962 pages in 1860ms
> [ 73.877964] node 107 initialised, 7732962 pages in 1860ms
> [ 73.906256] node 103 initialised, 7732962 pages in 1880ms
> [ 73.945581] node 100 initialised, 7732961 pages in 1930ms
> [ 73.947024] node 96 initialised, 7732961 pages in 1930ms
> [ 74.186208] node 116 initialised, 7732961 pages in 2170ms
> [ 74.220838] node 68 initialised, 7732961 pages in 2210ms
> [ 74.252341] node 46 initialised, 7732961 pages in 2240ms
> [ 74.274795] node 118 initialised, 7732961 pages in 2260ms
> [ 74.337544] node 14 initialised, 7732961 pages in 2320ms
> [ 74.350819] node 22 initialised, 7732961 pages in 2340ms
> [ 74.350332] node 69 initialised, 7732962 pages in 2340ms
> [ 74.362683] node 211 initialised, 7732962 pages in 2310ms
> [ 74.360617] node 70 initialised, 7732961 pages in 2340ms
> [ 74.369137] node 66 initialised, 7732961 pages in 2360ms
> [ 74.378242] node 115 initialised, 7732962 pages in 2360ms
> [ 74.404221] node 213 initialised, 7732962 pages in 2350ms
> [ 74.420901] node 210 initialised, 7732961 pages in 2370ms
> [ 74.430049] node 35 initialised, 7732962 pages in 2420ms
> [ 74.436007] node 48 initialised, 7732961 pages in 2420ms
> [ 74.480595] node 71 initialised, 7732962 pages in 2460ms
> [ 74.485700] node 67 initialised, 7732962 pages in 2480ms
> [ 74.502627] node 31 initialised, 7732962 pages in 2490ms
> [ 74.542220] node 16 initialised, 7732961 pages in 2530ms
> [ 74.547936] node 128 initialised, 7732961 pages in 2520ms
> [ 74.634374] node 214 initialised, 7732961 pages in 2580ms
> [ 74.654389] node 88 initialised, 7732961 pages in 2630ms
> [ 74.722833] node 117 initialised, 7732962 pages in 2700ms
> [ 74.735002] node 148 initialised, 7732961 pages in 2700ms
> [ 74.742725] node 12 initialised, 7732961 pages in 2730ms
> [ 74.749319] node 194 initialised, 7732961 pages in 2700ms
> [ 74.767979] node 24 initialised, 7732961 pages in 2750ms
> [ 74.769465] node 114 initialised, 7732961 pages in 2750ms
> [ 74.796973] node 134 initialised, 7732961 pages in 2770ms
> [ 74.818164] node 15 initialised, 7732962 pages in 2810ms
> [ 74.844852] node 18 initialised, 7732961 pages in 2830ms
> [ 74.866123] node 110 initialised, 7732961 pages in 2850ms
> [ 74.898255] node 215 initialised, 7730688 pages in 2840ms
> [ 74.903623] node 136 initialised, 7732961 pages in 2880ms
> [ 74.911107] node 144 initialised, 7732961 pages in 2890ms
> [ 74.918757] node 212 initialised, 7732961 pages in 2870ms
> [ 74.935333] node 182 initialised, 7732961 pages in 2880ms
> [ 74.958147] node 42 initialised, 7732961 pages in 2950ms
> [ 74.964989] node 108 initialised, 7732961 pages in 2950ms
> [ 74.965482] node 112 initialised, 7732961 pages in 2950ms
> [ 75.034787] node 184 initialised, 7732961 pages in 2980ms
> [ 75.051242] node 45 initialised, 7732962 pages in 3040ms
> [ 75.047169] node 152 initialised, 7732961 pages in 3020ms
> [ 75.062834] node 179 initialised, 7732962 pages in 3010ms
> [ 75.076528] node 145 initialised, 7732962 pages in 3040ms
> [ 75.076613] node 25 initialised, 7732962 pages in 3070ms
> [ 75.073086] node 164 initialised, 7732961 pages in 3040ms
> [ 75.079674] node 149 initialised, 7732962 pages in 3050ms
> [ 75.092015] node 113 initialised, 7732962 pages in 3070ms
> [ 75.096325] node 80 initialised, 7732961 pages in 3080ms
> [ 75.131380] node 92 initialised, 7732961 pages in 3110ms
> [ 75.142147] node 10 initialised, 7732961 pages in 3130ms
> [ 75.151041] node 51 initialised, 7732962 pages in 3140ms
> [ 75.159074] node 130 initialised, 7732961 pages in 3130ms
> [ 75.162616] node 166 initialised, 7732961 pages in 3130ms
> [ 75.193557] node 82 initialised, 7732961 pages in 3170ms
> [ 75.254801] node 84 initialised, 7732961 pages in 3240ms
> [ 75.303028] node 64 initialised, 7732961 pages in 3290ms
> [ 75.299739] node 49 initialised, 7732962 pages in 3290ms
> [ 75.314231] node 21 initialised, 7732962 pages in 3300ms
> [ 75.371298] node 53 initialised, 7732962 pages in 3360ms
> [ 75.394569] node 95 initialised, 7732962 pages in 3380ms
> [ 75.441101] node 23 initialised, 7732962 pages in 3430ms
> [ 75.433080] node 19 initialised, 7732962 pages in 3430ms
> [ 75.446076] node 173 initialised, 7732962 pages in 3410ms
> [ 75.445816] node 99 initialised, 7732962 pages in 3430ms
> [ 75.470330] node 87 initialised, 7732962 pages in 3450ms
> [ 75.502334] node 8 initialised, 7732961 pages in 3490ms
> [ 75.508300] node 206 initialised, 7732961 pages in 3460ms
> [ 75.540253] node 132 initialised, 7732961 pages in 3510ms
> [ 75.615453] node 183 initialised, 7732962 pages in 3560ms
> [ 75.632576] node 78 initialised, 7732961 pages in 3610ms
> [ 75.647753] node 85 initialised, 7732962 pages in 3620ms
> [ 75.688955] node 90 initialised, 7732961 pages in 3670ms
> [ 75.694522] node 200 initialised, 7732961 pages in 3640ms
> [ 75.688790] node 43 initialised, 7732962 pages in 3680ms
> [ 75.694540] node 94 initialised, 7732961 pages in 3680ms
> [ 75.697149] node 29 initialised, 7732962 pages in 3690ms
> [ 75.693590] node 111 initialised, 7732962 pages in 3680ms
> [ 75.715829] node 56 initialised, 7732961 pages in 3700ms
> [ 75.718427] node 97 initialised, 7732962 pages in 3700ms
> [ 75.741643] node 147 initialised, 7732962 pages in 3710ms
> [ 75.773613] node 170 initialised, 7732961 pages in 3740ms
> [ 75.802874] node 208 initialised, 7732961 pages in 3750ms
> [ 75.804409] node 58 initialised, 7732961 pages in 3790ms
> [ 75.853438] node 126 initialised, 7732961 pages in 3830ms
> [ 75.888167] node 167 initialised, 7732962 pages in 3850ms
> [ 75.912656] node 172 initialised, 7732961 pages in 3870ms
> [ 75.956540] node 93 initialised, 7732962 pages in 3940ms
> [ 75.988819] node 127 initialised, 7732962 pages in 3960ms
> [ 76.062198] node 201 initialised, 7732962 pages in 4010ms
> [ 76.091769] node 47 initialised, 7732962 pages in 4080ms
> [ 76.119749] node 162 initialised, 7732961 pages in 4080ms
> [ 76.122797] node 6 initialised, 7732961 pages in 4110ms
> [ 76.225916] node 153 initialised, 7732962 pages in 4190ms
> [ 76.219855] node 81 initialised, 7732962 pages in 4200ms
> [ 76.236116] node 150 initialised, 7732961 pages in 4210ms
> [ 76.245349] node 180 initialised, 7732961 pages in 4190ms
> [ 76.248827] node 17 initialised, 7732962 pages in 4240ms
> [ 76.258801] node 13 initialised, 7732962 pages in 4250ms
> [ 76.259943] node 122 initialised, 7732961 pages in 4240ms
> [ 76.277480] node 196 initialised, 7732961 pages in 4230ms
> [ 76.320830] node 41 initialised, 7732962 pages in 4310ms
> [ 76.351667] node 129 initialised, 7732962 pages in 4320ms
> [ 76.353488] node 202 initialised, 7732961 pages in 4310ms
> [ 76.376753] node 165 initialised, 7732962 pages in 4340ms
> [ 76.381807] node 124 initialised, 7732961 pages in 4350ms
> [ 76.419952] node 171 initialised, 7732962 pages in 4380ms
> [ 76.431242] node 168 initialised, 7732961 pages in 4390ms
> [ 76.441324] node 89 initialised, 7732962 pages in 4420ms
> [ 76.440720] node 155 initialised, 7732962 pages in 4400ms
> [ 76.459715] node 120 initialised, 7732961 pages in 4440ms
> [ 76.483986] node 205 initialised, 7732962 pages in 4430ms
> [ 76.493284] node 151 initialised, 7732962 pages in 4460ms
> [ 76.491437] node 60 initialised, 7732961 pages in 4480ms
> [ 76.526620] node 74 initialised, 7732961 pages in 4510ms
> [ 76.543761] node 131 initialised, 7732962 pages in 4510ms
> [ 76.549562] node 39 initialised, 7732962 pages in 4540ms
> [ 76.563861] node 11 initialised, 7732962 pages in 4550ms
> [ 76.598775] node 54 initialised, 7732961 pages in 4590ms
> [ 76.602006] node 123 initialised, 7732962 pages in 4570ms
> [ 76.619856] node 76 initialised, 7732961 pages in 4600ms
> [ 76.631418] node 198 initialised, 7732961 pages in 4580ms
> [ 76.665415] node 188 initialised, 7732961 pages in 4610ms
> [ 76.669178] node 63 initialised, 7732962 pages in 4660ms
> [ 76.683646] node 101 initialised, 7732962 pages in 4670ms
> [ 76.710780] node 192 initialised, 7732961 pages in 4660ms
> [ 76.736743] node 121 initialised, 7732962 pages in 4720ms
> [ 76.743800] node 199 initialised, 7732962 pages in 4700ms
> [ 76.750663] node 20 initialised, 7732961 pages in 4740ms
> [ 76.763045] node 135 initialised, 7732962 pages in 4730ms
> [ 76.768216] node 137 initialised, 7732962 pages in 4740ms
> [ 76.800135] node 181 initialised, 7732962 pages in 4750ms
> [ 76.811215] node 27 initialised, 7732962 pages in 4800ms
> [ 76.857405] node 125 initialised, 7732962 pages in 4820ms
> [ 76.853750] node 163 initialised, 7732962 pages in 4820ms
> [ 76.882975] node 59 initialised, 7732962 pages in 4870ms
> [ 76.920121] node 9 initialised, 7732962 pages in 4910ms
> [ 76.934824] node 189 initialised, 7732962 pages in 4880ms
> [ 76.951223] node 154 initialised, 7732961 pages in 4920ms
> [ 76.953897] node 203 initialised, 7732962 pages in 4900ms
> [ 76.952558] node 75 initialised, 7732962 pages in 4930ms
> [ 76.985480] node 119 initialised, 7732962 pages in 4970ms
> [ 77.036089] node 195 initialised, 7732962 pages in 4980ms
> [ 77.039996] node 55 initialised, 7732962 pages in 5030ms
> [ 77.067989] node 109 initialised, 7732962 pages in 5040ms
> [ 77.066236] node 7 initialised, 7732962 pages in 5060ms
> [ 77.068709] node 65 initialised, 7732962 pages in 5060ms
> [ 77.097859] node 79 initialised, 7732962 pages in 5080ms
> [ 77.096219] node 169 initialised, 7732962 pages in 5060ms
> [ 77.125113] node 83 initialised, 7732962 pages in 5110ms
> [ 77.139507] node 37 initialised, 7732962 pages in 5130ms
> [ 77.143280] node 77 initialised, 7732962 pages in 5120ms
> [ 77.226494] node 73 initialised, 7732962 pages in 5200ms
> [ 77.281584] node 190 initialised, 7732961 pages in 5230ms
> [ 77.314794] node 204 initialised, 7732961 pages in 5260ms
> [ 77.328577] node 72 initialised, 7732961 pages in 5310ms
> [ 77.335743] node 36 initialised, 7732961 pages in 5320ms
> [ 77.360573] node 40 initialised, 7732961 pages in 5350ms
> [ 77.368712] node 207 initialised, 7732962 pages in 5320ms
> [ 77.387708] node 91 initialised, 7732962 pages in 5370ms
> [ 77.385143] node 57 initialised, 7732962 pages in 5380ms
> [ 77.391785] node 191 initialised, 7732962 pages in 5340ms
> [ 77.479970] node 185 initialised, 7732962 pages in 5430ms
> [ 77.491865] node 61 initialised, 7732962 pages in 5480ms
> [ 77.489255] node 133 initialised, 7732962 pages in 5460ms
> [ 77.502111] node 197 initialised, 7732962 pages in 5450ms
> [ 77.507136] node 193 initialised, 7732962 pages in 5460ms
> [ 77.523739] node 209 initialised, 7732962 pages in 5470ms
> [ 77.537131] node 187 initialised, 7732962 pages in 5490ms
>
> -- [2]
>
> http://ozlabs.org/~akpm/mmots/broken-out/memblock-introduce-a-for_each_reserved_mem_region-iterator.patch
> http://ozlabs.org/~akpm/mmots/broken-out/mm-meminit-move-page-initialization-into-a-separate-function.patch
> http://ozlabs.org/~akpm/mmots/broken-out/mm-meminit-only-set-page-reserved-in-the-memblock-region.patch
> http://ozlabs.org/~akpm/mmots/broken-out/mm-page_alloc-pass-pfn-to-__free_pages_bootmem.patch
> http://ozlabs.org/~akpm/mmots/broken-out/mm-meminit-make-__early_pfn_to_nid-smp-safe-and-introduce-meminit_pfn_in_nid.patch
> http://ozlabs.org/~akpm/mmots/broken-out/mm-meminit-inline-some-helper-functions.patch
> http://ozlabs.org/~akpm/mmots/broken-out/mm-meminit-inline-some-helper-functions-fix.patch
> http://ozlabs.org/~akpm/mmots/broken-out/mm-meminit-initialise-a-subset-of-struct-pages-if-config_deferred_struct_page_init-is-set.patch
> http://ozlabs.org/~akpm/mmots/broken-out/mm-meminit-initialise-remaining-struct-pages-in-parallel-with-kswapd.patch
> http://ozlabs.org/~akpm/mmots/broken-out/mm-meminit-minimise-number-of-pfn-page-lookups-during-initialisation.patch
> http://ozlabs.org/~akpm/mmots/broken-out/x86-mm-enable-deferred-struct-page-initialisation-on-x86-64.patch
> http://ozlabs.org/~akpm/mmots/broken-out/mm-meminit-free-pages-in-large-chunks-where-possible.patch
> http://ozlabs.org/~akpm/mmots/broken-out/mm-meminit-reduce-number-of-times-pageblocks-are-set-during-struct-page-init.patch
> http://ozlabs.org/~akpm/mmots/broken-out/mm-meminit-remove-mminit_verify_page_links.patch
> http://ozlabs.org/~akpm/mmots/broken-out/mm-meminit-initialise-a-subset-of-struct-pages-if-config_deferred_struct_page_init-is-set-fix.patch
> http://ozlabs.org/~akpm/mmots/broken-out/mm-meminit-finish-initialisation-of-struct-pages-before-basic-setup.patch
> http://ozlabs.org/~akpm/mmots/broken-out/mm-meminit-finish-initialisation-of-struct-pages-before-basic-setup-fix.patch
> http://ozlabs.org/~akpm/mmots/broken-out/mm-meminit-reduce-number-of-times-pageblocks-are-set-during-struct-page-init-fix.patch
> http://ozlabs.org/~akpm/mmots/broken-out/mm-meminit-inline-some-helper-functions-fix2.patch
>
View attachment "0001-Avoid-the-contention-in-set_cpus_allowed.patch" of type "text/x-patch" (2281 bytes)
Powered by blists - more mailing lists