From: Mark Nelson <mnelson@redhat.com>
To: Alexandre DERUMIER <aderumier@odiso.com>,
ceph-devel <ceph-devel@vger.kernel.org>,
ceph-users <ceph-users@lists.ceph.com>
Cc: Somnath Roy <somnath.roy@sandisk.com>
Subject: Re: [ceph-users] jemalloc and transparent hugepage
Date: Tue, 08 Sep 2015 18:49:35 -0500 [thread overview]
Message-ID: <55EF740F.5090605@redhat.com> (raw)
In-Reply-To: <1751466764.35298801.1441755238223.JavaMail.zimbra@oxygem.tv>
Excellent investigation Alexandre! Have you noticed any performance
difference with tp=never?
Mark
On 09/08/2015 06:33 PM, Alexandre DERUMIER wrote:
> I have done small benchmark with tcmalloc and jemalloc, transparent hugepage=always|never.
>
> for tcmalloc, they are no difference.
> but for jemalloc, the difference is huge (around 25% lower with tp=never).
>
> jemmaloc 4.6.0+tp=never vs tcmalloc use 10% more RSS memory
>
> jemmaloc 4.0+tp=never almost use same RSS memory than tcmalloc !
>
>
> I don't have monitored memory usage in recovery, but I think it should help too.
>
>
>
>
> tcmalloc 2.1 tp=always
> -------------------
> USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
>
> root 67746 120 1.0 1531220 671152 ? Ssl 01:18 0:43 /usr/bin/ceph-osd --cluster=ceph -i 0 -f
> root 67764 144 1.0 1570256 711232 ? Ssl 01:18 0:51 /usr/bin/ceph-osd --cluster=ceph -i 1 -f
>
> root 68363 220 0.9 1522292 655888 ? Ssl 01:19 0:46 /usr/bin/ceph-osd --cluster=ceph -i 0 -f
> root 68381 261 1.0 1563396 702500 ? Ssl 01:19 0:55 /usr/bin/ceph-osd --cluster=ceph -i 1 -f
>
> root 68963 228 1.0 1519240 666196 ? Ssl 01:20 0:31 /usr/bin/ceph-osd --cluster=ceph -i 0 -f
> root 68981 268 1.0 1564452 694352 ? Ssl 01:20 0:37 /usr/bin/ceph-osd --cluster=ceph -i 1 -f
>
>
>
> tcmalloc 2.1 tp=never
> -----------------
> USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
>
> root 69560 144 1.0 1544968 677584 ? Ssl 01:21 0:20 /usr/bin/ceph-osd --cluster=ceph -i 0 -f
> root 69578 167 1.0 1568620 704456 ? Ssl 01:21 0:23 /usr/bin/ceph-osd --cluster=ceph -i 1 -f
>
>
> root 70156 164 0.9 1519680 649776 ? Ssl 01:21 0:16 /usr/bin/ceph-osd --cluster=ceph -i 0 -f
> root 70174 214 1.0 1559772 692828 ? Ssl 01:21 0:19 /usr/bin/ceph-osd --cluster=ceph -i 1 -f
>
> root 70757 202 0.9 1520376 650572 ? Ssl 01:22 0:20 /usr/bin/ceph-osd --cluster=ceph -i 0 -f
> root 70775 236 1.0 1560644 694088 ? Ssl 01:22 0:23 /usr/bin/ceph-osd --cluster=ceph -i 1 -f
>
>
>
> jemalloc 3.6 tp = always
> ------------------------
> USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
>
> root 92005 46.1 1.4 2033864 967512 ? Ssl 01:00 0:04 /usr/bin/ceph-osd --cluster=ceph -i 5 -f
> root 92027 45.5 1.4 2021624 963536 ? Ssl 01:00 0:04 /usr/bin/ceph-osd --cluster=ceph -i 4 -f
>
>
>
> root 92703 191 1.5 2138724 1002376 ? Ssl 01:02 1:16 /usr/bin/ceph-osd --cluster=ceph -i 5 -f
> root 92721 183 1.5 2126228 986448 ? Ssl 01:02 1:13 /usr/bin/ceph-osd --cluster=ceph -i 4 -f
>
>
> root 93366 258 1.4 2139052 984132 ? Ssl 01:03 1:09 /usr/bin/ceph-osd --cluster=ceph -i 5 -f
> root 93384 250 1.5 2126244 990348 ? Ssl 01:03 1:07 /usr/bin/ceph-osd --cluster=ceph -i 4 -f
>
>
>
> jemalloc 3.6 tp = never
> -----------------------
> USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
>
> root 93990 238 1.1 2105812 762628 ? Ssl 01:04 1:16 /usr/bin/ceph-osd --cluster=ceph -i 4 -f
> root 94033 263 1.1 2118288 781768 ? Ssl 01:04 1:18 /usr/bin/ceph-osd --cluster=ceph -i 5 -f
>
>
> root 94656 266 1.1 2139096 781392 ? Ssl 01:05 0:58 /usr/bin/ceph-osd --cluster=ceph -i 5 -f
> root 94674 257 1.1 2126316 760632 ? Ssl 01:05 0:56 /usr/bin/ceph-osd --cluster=ceph -i 4 -f
>
> root 95317 297 1.1 2135044 780532 ? Ssl 01:06 0:35 /usr/bin/ceph-osd --cluster=ceph -i 5 -f
> root 95335 284 1.1 2112016 760972 ? Ssl 01:06 0:34 /usr/bin/ceph-osd --cluster=ceph -i 4 -f
>
>
>
> jemalloc 4.0 tp = always
> ------------------------
> USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
>
> root 100275 198 1.3 1784520 880288 ? Ssl 01:14 0:45 /usr/bin/ceph-osd --cluster=ceph -i 4 -f
> root 100320 239 1.1 1793184 760824 ? Ssl 01:14 0:47 /usr/bin/ceph-osd --cluster=ceph -i 5 -f
>
>
> root 100897 200 1.3 1765780 891256 ? Ssl 01:15 0:50 /usr/bin/ceph-osd --cluster=ceph -i 4 -f
> root 100942 245 1.1 1817436 746956 ? Ssl 01:15 0:53 /usr/bin/ceph-osd --cluster=ceph -i 5 -f
>
> root 101517 196 1.3 1769904 877132 ? Ssl 01:16 0:33 /usr/bin/ceph-osd --cluster=ceph -i 4 -f
> root 101562 258 1.1 1805172 746532 ? Ssl 01:16 0:36 /usr/bin/ceph-osd --cluster=ceph -i 5 -f
>
>
> jemalloc 4.0 tp = never
> -----------------------
> USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
>
> root 98362 87.8 1.0 1841748 678848 ? Ssl 01:10 0:53 /usr/bin/ceph-osd --cluster=ceph -i 4 -f
> root 98405 97.0 1.0 1846328 699620 ? Ssl 01:10 0:56 /usr/bin/ceph-osd --cluster=ceph -i 5 -f
>
>
>
> root 99018 233 1.0 1812580 698848 ? Ssl 01:12 0:30 /usr/bin/ceph-osd --cluster=ceph -i 5 -f
> root 99036 226 1.0 1822344 677420 ? Ssl 01:12 0:29 /usr/bin/ceph-osd --cluster=ceph -i 4 -f
>
> root 99666 281 1.0 1814640 696420 ? Ssl 01:13 0:33 /usr/bin/ceph-osd --cluster=ceph -i 5 -f
> root 99684 266 1.0 1835676 676768 ? Ssl 01:13 0:32 /usr/bin/ceph-osd --cluster=ceph -i 4 -f
>
>
>
>
> ----- Mail original -----
> De: "aderumier" <aderumier@odiso.com>
> À: "ceph-devel" <ceph-devel@vger.kernel.org>, "ceph-users" <ceph-users@lists.ceph.com>
> Envoyé: Mardi 8 Septembre 2015 21:42:35
> Objet: [ceph-users] jemalloc and transparent hugepage
>
> Hi,
> I have found an interesting article about jemalloc and transparent hugepages
>
> https://www.digitalocean.com/company/blog/transparent-huge-pages-and-alternative-memory-allocators/
>
>
> Could be great to see if disable transparent hugepage help to have lower jemalloc memory usage.
>
>
> Regards,
>
> Alexandre
>
> _______________________________________________
> ceph-users mailing list
> ceph-users@lists.ceph.com
> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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next prev parent reply other threads:[~2015-09-08 23:49 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-08 19:42 jemalloc and transparent hugepage Alexandre DERUMIER
[not found] ` <1694547545.35004320.1441741355122.JavaMail.zimbra-M8QNeUgB6UTyG1zEObXtfA@public.gmane.org>
2015-09-08 23:33 ` Alexandre DERUMIER
2015-09-08 23:49 ` Mark Nelson [this message]
[not found] ` <55EF740F.5090605-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2015-09-08 23:52 ` Mark Nelson
[not found] ` <55EF74C3.80805-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2015-09-09 0:08 ` Shinobu Kinjo
2015-09-09 2:01 ` Alexandre DERUMIER
[not found] ` <502903422.35467518.1441764112283.JavaMail.zimbra-M8QNeUgB6UTyG1zEObXtfA@public.gmane.org>
2015-09-09 2:07 ` Sage Weil
[not found] ` <alpine.DEB.2.00.1509081904060.24969-vIokxiIdD2AQNTJnQDzGJqxOck334EZe@public.gmane.org>
2015-09-09 4:37 ` Alexandre DERUMIER
[not found] ` <2101903912.35682875.1441773442800.JavaMail.zimbra-M8QNeUgB6UTyG1zEObXtfA@public.gmane.org>
2015-09-09 5:08 ` Alexandre DERUMIER
2015-09-09 9:54 ` [ceph-users] " Jan Schermer
[not found] ` <FB27F807-B398-4FA2-AD64-EB8FE7A66B47-SB6/BxVxTjHtwjQa/ONI9g@public.gmane.org>
2015-09-09 10:37 ` HEWLETT, Paul (Paul)
2015-09-09 11:01 ` [ceph-users] " Jan Schermer
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