Date: Sat, 4 Jan 2014 23:37:02 +0000 (UTC) From: Alexander Motin <mav@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r260301 - stable/10/sys/vm Message-ID: <201401042337.s04Nb237060055@svn.freebsd.org>
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Author: mav Date: Sat Jan 4 23:37:01 2014 New Revision: 260301 URL: http://svnweb.freebsd.org/changeset/base/260301 Log: MFC r258337: Add two new UMA bucket zones to store 3 and 9 items per bucket. These new buckets make bucket size self-tuning more soft and precise. Without them there are buckets for 1, 5, 13, 29, ... items. While at bigger sizes difference about 2x is fine, at smallest ones it is 5x and 2.6x respectively. New buckets make that line look like 1, 3, 5, 9, 13, 29, reducing jumps between steps, making algorithm work softer, allocating and freeing memory in better fitting chunks. Otherwise there is quite a big gap between allocating 128K and 5x128K of RAM at once. Modified: stable/10/sys/vm/uma_core.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/vm/uma_core.c ============================================================================== --- stable/10/sys/vm/uma_core.c Sat Jan 4 23:35:34 2014 (r260300) +++ stable/10/sys/vm/uma_core.c Sat Jan 4 23:37:01 2014 (r260301) @@ -207,7 +207,9 @@ struct uma_bucket_zone { struct uma_bucket_zone bucket_zones[] = { { NULL, "4 Bucket", BUCKET_SIZE(4), 4096 }, + { NULL, "6 Bucket", BUCKET_SIZE(6), 3072 }, { NULL, "8 Bucket", BUCKET_SIZE(8), 2048 }, + { NULL, "12 Bucket", BUCKET_SIZE(12), 1536 }, { NULL, "16 Bucket", BUCKET_SIZE(16), 1024 }, { NULL, "32 Bucket", BUCKET_SIZE(32), 512 }, { NULL, "64 Bucket", BUCKET_SIZE(64), 256 },
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