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Date: Tue, 13 Sep 2011 14:43:47 +0000
From: "Serge E. Hallyn" <serge@...lyn.com>
To: akpm@...l.org, segooon@...il.com, linux-kernel@...r.kernel.org,
netdev@...r.kernel.org, containers@...ts.linux-foundation.org,
dhowells@...hat.com, ebiederm@...ssion.com, rdunlap@...otime.net
Subject: Re: user namespaces v3: continue targetting capabilities
I did a bit of basic performance testing - just running unixbench
and doing a kernel compile (without profiling) with and without
this patchset, with USER_NS enabled for both. I could find no
meaningful impact.
473.01user 32.48system 9:05.44elapsed 92%CPU (0avgtext+0avgdata 430752maxresident)k
112736inputs+576936outputs (8major+22057422minor)pagefaults 0swaps
473.78user 33.12system 9:06.14elapsed 92%CPU (0avgtext+0avgdata 430752maxresident)k
116656inputs+576936outputs (12major+22056621minor)pagefaults 0swaps
and with:
474.09user 31.62system 9:05.70elapsed 92%CPU (0avgtext+0avgdata 430752maxresident)k
112648inputs+576936outputs (7major+22056909minor)pagefaults 0swaps
472.54user 33.26system 9:05.43elapsed 92%CPU (0avgtext+0avgdata 430608maxresident)k
116656inputs+576936outputs (12major+22058358minor)pagefaults 0swaps
I'll append the full unixbench outputs below, but index score without
the patchset was 1594.3, and with the patchset was 1597.4.
thanks,
-serge
=====================================================================
unixbench without patchset:
=====================================================================
BYTE UNIX Benchmarks (Version 5.1.3)
System: marula: GNU/Linux
OS: GNU/Linux -- 3.0.0-11-server -- #17-Ubuntu SMP Fri Sep 9 19:31:36 UTC 2011
Machine: x86_64 (x86_64)
Language: en_US.utf8 (charmap="UTF-8", collate="UTF-8")
CPU 0: Intel(R) Xeon(R) CPU E5530 @ 2.40GHz (4800.3 bogomips)
Hyper-Threading, x86-64, MMX, Physical Address Ext, SYSENTER/SYSEXIT, SYSCALL/SYSRET, Intel virtualization
02:43:44 up 3:00, 1 user, load average: 0.05, 0.03, 0.03; runlevel 2
------------------------------------------------------------------------
Benchmark Run: Mon Sep 12 2011 02:43:44 - 03:11:55
1 CPU in system; running 1 parallel copy of tests
Dhrystone 2 using register variables 28147322.1 lps (10.0 s, 7 samples)
Double-Precision Whetstone 3289.7 MWIPS (10.0 s, 7 samples)
Execl Throughput 4557.5 lps (30.0 s, 2 samples)
File Copy 1024 bufsize 2000 maxblocks 1145450.6 KBps (30.0 s, 2 samples)
File Copy 256 bufsize 500 maxblocks 312941.7 KBps (30.0 s, 2 samples)
File Copy 4096 bufsize 8000 maxblocks 1969030.8 KBps (30.0 s, 2 samples)
Pipe Throughput 2080076.5 lps (10.0 s, 7 samples)
Pipe-based Context Switching 331910.6 lps (10.0 s, 7 samples)
Process Creation 14921.7 lps (30.0 s, 2 samples)
Shell Scripts (1 concurrent) 6989.7 lpm (60.0 s, 2 samples)
Shell Scripts (8 concurrent) 913.9 lpm (60.0 s, 2 samples)
System Call Overhead 3453367.4 lps (10.0 s, 7 samples)
System Benchmarks Index Values BASELINE RESULT INDEX
Dhrystone 2 using register variables 116700.0 28147322.1 2411.9
Double-Precision Whetstone 55.0 3289.7 598.1
Execl Throughput 43.0 4557.5 1059.9
File Copy 1024 bufsize 2000 maxblocks 3960.0 1145450.6 2892.6
File Copy 256 bufsize 500 maxblocks 1655.0 312941.7 1890.9
File Copy 4096 bufsize 8000 maxblocks 5800.0 1969030.8 3394.9
Pipe Throughput 12440.0 2080076.5 1672.1
Pipe-based Context Switching 4000.0 331910.6 829.8
Process Creation 126.0 14921.7 1184.3
Shell Scripts (1 concurrent) 42.4 6989.7 1648.5
Shell Scripts (8 concurrent) 6.0 913.9 1523.2
System Call Overhead 15000.0 3453367.4 2302.2
========
System Benchmarks Index Score 1594.3
=====================================================================
unixbench with patchset:
=====================================================================
BYTE UNIX Benchmarks (Version 5.1.3)
System: marula: GNU/Linux
OS: GNU/Linux -- 3.0.0-11-server -- #17userns1 SMP Mon Sep 12 13:42:40 UTC 2011
Machine: x86_64 (x86_64)
Language: en_US.utf8 (charmap="UTF-8", collate="UTF-8")
CPU 0: Intel(R) Xeon(R) CPU E5530 @ 2.40GHz (4799.6 bogomips)
Hyper-Threading, x86-64, MMX, Physical Address Ext, SYSENTER/SYSEXIT, SYSCALL/SYSRET, Intel virtualization
12:42:07 up 8 min, 1 user, load average: 0.00, 0.01, 0.02; runlevel 2
------------------------------------------------------------------------
Benchmark Run: Mon Sep 12 2011 12:42:07 - 13:10:19
1 CPU in system; running 1 parallel copy of tests
Dhrystone 2 using register variables 28232156.4 lps (10.0 s, 7 samples)
Double-Precision Whetstone 3290.0 MWIPS (10.0 s, 7 samples)
Execl Throughput 4553.7 lps (29.9 s, 2 samples)
File Copy 1024 bufsize 2000 maxblocks 1142317.5 KBps (30.0 s, 2 samples)
File Copy 256 bufsize 500 maxblocks 317068.8 KBps (30.0 s, 2 samples)
File Copy 4096 bufsize 8000 maxblocks 1956611.4 KBps (30.0 s, 2 samples)
Pipe Throughput 2086728.8 lps (10.0 s, 7 samples)
Pipe-based Context Switching 343275.1 lps (10.0 s, 7 samples)
Process Creation 14718.6 lps (30.0 s, 2 samples)
Shell Scripts (1 concurrent) 6989.0 lpm (60.0 s, 2 samples)
Shell Scripts (8 concurrent) 913.6 lpm (60.0 s, 2 samples)
System Call Overhead 3434956.0 lps (10.0 s, 7 samples)
System Benchmarks Index Values BASELINE RESULT INDEX
Dhrystone 2 using register variables 116700.0 28232156.4 2419.2
Double-Precision Whetstone 55.0 3290.0 598.2
Execl Throughput 43.0 4553.7 1059.0
File Copy 1024 bufsize 2000 maxblocks 3960.0 1142317.5 2884.6
File Copy 256 bufsize 500 maxblocks 1655.0 317068.8 1915.8
File Copy 4096 bufsize 8000 maxblocks 5800.0 1956611.4 3373.5
Pipe Throughput 12440.0 2086728.8 1677.4
Pipe-based Context Switching 4000.0 343275.1 858.2
Process Creation 126.0 14718.6 1168.1
Shell Scripts (1 concurrent) 42.4 6989.0 1648.3
Shell Scripts (8 concurrent) 6.0 913.6 1522.6
System Call Overhead 15000.0 3434956.0 2290.0
========
System Benchmarks Index Score 1597.4
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