From: Vlastimil Babka <vbabka@suse.cz>
To: Vitaly Wool <vitalywool@gmail.com>, Minchan Kim <minchan@kernel.org>
Cc: "Sergey Senozhatsky" <sergey.senozhatsky@gmail.com>,
"Dan Streetman" <ddstreet@ieee.org>,
LKML <linux-kernel@vger.kernel.org>,
Linux-MM <linux-mm@kvack.org>, 김준수 <iamjoonsoo.kim@lge.com>,
"Gioh Kim" <gioh.kim@lge.com>
Subject: Re: [PATCH 0/3] allow zram to use zbud as underlying allocator
Date: Wed, 30 Sep 2015 17:37:35 +0200 [thread overview]
Message-ID: <560C01BF.3040604@suse.cz> (raw)
In-Reply-To: <CAMJBoFM_bMvQthAJPK+w4uQznqp7eFLdk=c7ZtT-R1aoF-1SeA@mail.gmail.com>
On 09/25/2015 11:54 AM, Vitaly Wool wrote:
> Hello Minchan,
>
> the main use case where I see unacceptably long stalls in UI with
> zsmalloc is switching between users in Android.
> There is a way to automate user creation and switching between them so
> the test I run both to get vmstat statistics and to profile stalls is
> to create a user, switch to it and switch back. Each test cycle does
> that 10 times, and all the results presented below are averages for 20
> runs.
>
> Kernel configurations used for testing:
>
> (1): vanilla
> (2): (1) plus "make SLUB atomic" patch [1]
> (3): (1) with zbud instead of zsmalloc
> (4): (2) with compaction defer logic mostly disabled
Disabling compaction deferring leads to less compaction stalls? That
indeed looks very weird and counter-intuitive. Also what's "mostly"
disabled mean?
WARNING: multiple messages have this Message-ID (diff)
From: Vlastimil Babka <vbabka@suse.cz>
To: Vitaly Wool <vitalywool@gmail.com>, Minchan Kim <minchan@kernel.org>
Cc: "Sergey Senozhatsky" <sergey.senozhatsky@gmail.com>,
"Dan Streetman" <ddstreet@ieee.org>,
LKML <linux-kernel@vger.kernel.org>,
Linux-MM <linux-mm@kvack.org>, 김준수 <iamjoonsoo.kim@lge.com>,
"Gioh Kim" <gioh.kim@lge.com>
Subject: Re: [PATCH 0/3] allow zram to use zbud as underlying allocator
Date: Wed, 30 Sep 2015 17:37:35 +0200 [thread overview]
Message-ID: <560C01BF.3040604@suse.cz> (raw)
In-Reply-To: <CAMJBoFM_bMvQthAJPK+w4uQznqp7eFLdk=c7ZtT-R1aoF-1SeA@mail.gmail.com>
On 09/25/2015 11:54 AM, Vitaly Wool wrote:
> Hello Minchan,
>
> the main use case where I see unacceptably long stalls in UI with
> zsmalloc is switching between users in Android.
> There is a way to automate user creation and switching between them so
> the test I run both to get vmstat statistics and to profile stalls is
> to create a user, switch to it and switch back. Each test cycle does
> that 10 times, and all the results presented below are averages for 20
> runs.
>
> Kernel configurations used for testing:
>
> (1): vanilla
> (2): (1) plus "make SLUB atomic" patch [1]
> (3): (1) with zbud instead of zsmalloc
> (4): (2) with compaction defer logic mostly disabled
Disabling compaction deferring leads to less compaction stalls? That
indeed looks very weird and counter-intuitive. Also what's "mostly"
disabled mean?
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next prev parent reply other threads:[~2015-09-30 15:37 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-14 13:49 [PATCH 0/3] allow zram to use zbud as underlying allocator Vitaly Wool
2015-09-14 13:49 ` Vitaly Wool
2015-09-14 13:50 ` [PATCH 1/3] zram: make max_zpage_size configurable Vitaly Wool
2015-09-14 13:50 ` Vitaly Wool
2015-09-15 1:00 ` Sergey Senozhatsky
2015-09-15 1:00 ` Sergey Senozhatsky
2015-09-15 7:18 ` Vitaly Wool
2015-09-15 7:38 ` Sergey Senozhatsky
2015-09-15 7:38 ` Sergey Senozhatsky
2015-09-15 5:42 ` Dan Streetman
2015-09-15 5:42 ` Dan Streetman
2015-09-15 6:08 ` Sergey Senozhatsky
2015-09-15 6:08 ` Sergey Senozhatsky
2015-09-14 13:51 ` [PATCH 2/3] zpool/zsmalloc/zbud: align on interfaces Vitaly Wool
2015-09-14 13:51 ` Vitaly Wool
2015-09-15 1:06 ` Sergey Senozhatsky
2015-09-15 1:06 ` Sergey Senozhatsky
2015-09-15 5:09 ` Dan Streetman
2015-09-15 5:09 ` Dan Streetman
2015-09-14 13:55 ` [PATCH 3/3] zram: use common zpool interface Vitaly Wool
2015-09-14 13:55 ` Vitaly Wool
2015-09-15 1:12 ` Sergey Senozhatsky
2015-09-15 1:12 ` Sergey Senozhatsky
2015-09-15 6:03 ` Dan Streetman
2015-09-15 6:03 ` Dan Streetman
2015-09-14 14:01 ` [PATCH 0/3] allow zram to use zbud as underlying allocator Vlastimil Babka
2015-09-14 14:01 ` Vlastimil Babka
2015-09-14 14:12 ` Vitaly Wool
2015-09-14 14:12 ` Vitaly Wool
2015-09-14 14:14 ` Vlastimil Babka
2015-09-14 14:14 ` Vlastimil Babka
2015-09-15 4:08 ` Dan Streetman
2015-09-15 4:08 ` Dan Streetman
2015-09-15 4:22 ` Sergey Senozhatsky
2015-09-15 4:22 ` Sergey Senozhatsky
2015-09-17 6:21 ` Vlastimil Babka
2015-09-17 6:21 ` Vlastimil Babka
2015-09-17 9:19 ` Sergey Senozhatsky
2015-09-17 9:19 ` Sergey Senozhatsky
2015-09-15 0:49 ` Sergey Senozhatsky
2015-09-15 0:49 ` Sergey Senozhatsky
2015-09-15 6:13 ` Minchan Kim
2015-09-15 6:13 ` Minchan Kim
2015-09-25 9:54 ` Vitaly Wool
2015-09-25 9:54 ` Vitaly Wool
2015-09-30 7:52 ` Minchan Kim
2015-09-30 7:52 ` Minchan Kim
2015-09-30 8:01 ` Vitaly Wool
2015-09-30 8:01 ` Vitaly Wool
2015-09-30 8:13 ` Minchan Kim
2015-09-30 8:13 ` Minchan Kim
2015-09-30 8:18 ` Vitaly Wool
2015-09-30 8:18 ` Vitaly Wool
2015-09-30 15:37 ` Vlastimil Babka [this message]
2015-09-30 15:37 ` Vlastimil Babka
2015-09-30 15:46 ` Vitaly Wool
2015-09-30 15:46 ` Vitaly Wool
2015-10-01 7:52 ` Vlastimil Babka
2015-10-01 7:52 ` Vlastimil Babka
2015-10-10 9:33 ` Vitaly Wool
2015-10-10 9:33 ` Vitaly Wool
2015-10-14 13:28 ` Vlastimil Babka
2015-10-14 13:28 ` Vlastimil Babka
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