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[Bug libc/16830] New: memset performance regression
- From: "schwab at linux-m68k dot org" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Thu, 10 Apr 2014 16:04:07 +0000
- Subject: [Bug libc/16830] New: memset performance regression
- Auto-submitted: auto-generated
https://sourceware.org/bugzilla/show_bug.cgi?id=16830
Bug ID: 16830
Summary: memset performance regression
Product: glibc
Version: 2.18
Status: NEW
Severity: normal
Priority: P2
Component: libc
Assignee: unassigned at sourceware dot org
Reporter: schwab@linux-m68k.org
CC: drepper.fsp at gmail dot com, neleai at seznam dot cz
Host: x86_64-*-*
https://java.net/projects/libmicro
usecs/call usecs/call
2.11 2.18
Intel Harpertown Socket 771
Unit memset_10m 3743.0016 ( 0.00%) 5447.0912 (-45.53%)
Unit memsetP2_10m 7541.9904 ( 0.00%) 11094.2976 (-47.10%)
Xeon(R) CPU E5504 Gainestown
Unit memset_10m 1147.8016 ( 0.00%) 1702.6816 (-48.34%)
Unit memsetP2_10m 2058.1120 ( 0.00%) 2864.3072 (-39.17%)
Opteron 270
Unit memset_10m 2112.1584 ( 0.00%) 4910.7742 (-132.50%)
Unit memsetP2_10m 2145.8658 ( 0.00%) 4957.2592 (-131.01%)
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