Weekly Edition
Return to the Kernel page
| |||||||||||||||||||
Stacker: april 15 release
Hi,
On www.sf.net/projects/lsm-stacker there is a new stacker release. Some
performance results on x86 are attached. To summarize:
Plain Stack
---------------------------------------------------------------
unixbench final score: 520.9 522.6
dbench avg 10 runs: 198 stdev 1 205 stdev 1
hackbench: 17 stdev 5 18 stdev 7
kernbench (sys time): 28.45 stdev .04 28.35 stdev .08
So hackbench is the only one which is not actually faster with stacking.
Stacker now tries to symbol_get() the security_ops during
mod_reg_security, because unloading a security modules is not safe. You
can disable a security module as before by doing
echo modulename > /sys/stacker/unload
This is because we can easily protect against removal from the list of
modules, but if the module operations can also disappear on a whim, then
we'll need to introduce a usage count, or make very good use of the fact
that module unloading seems to stop all cpus.
In order to make stacker as fast as possible for the common case of
selinux+capabilities, security_get_value() is now a wrapper whose
fastpath assumes the result will always be the first element on the
chain. If that is not the case, then it calls __security_get_value() to
actually walk the chain. This seems to walk the fine line between
inlining the fast path, without making the code much larger by inlining
the whole __security_get_value().
The system also passed the LTP selinux testsuite.
I know I still need to work out details like deselecting
CONFIG_SECURITY_CAPABILITIES when selinux is enabled. However, does
this adequately address performance issues, and are the overall design
decisions sane?
thanks,
-serge
--
Serge Hallyn <serue@us.ibm.com>
BYTE UNIX Benchmarks (Version 4.1.0)
System -- Linux serge.austin.ibm.com 2.6.12-rc2 #1 Wed Apr 13 14:04:45 CDT 2005 i686 i686 i386
GNU/Linux
Start Benchmark Run: Fri Apr 15 09:52:48 CDT 2005
1 interactive users.
09:52:48 up 4 min, 1 user, load average: 0.08, 0.11, 0.06
lrwxrwxrwx 1 root root 4 Jan 5 11:56 /bin/sh -> bash
/bin/sh: symbolic link to `bash'
/dev/hda3 20161204 15817260 3319804 83% /
Dhrystone 2 using register variables 3611201.8 lps (10.0 secs, 10
samples)
Double-Precision Whetstone 802.3 MWIPS (10.4 secs, 10
samples)
System Call Overhead 1095015.4 lps (10.0 secs, 10
samples)
Pipe Throughput 702560.0 lps (10.0 secs, 10
samples)
Pipe-based Context Switching 152786.8 lps (10.0 secs, 10
samples)
Process Creation 11890.8 lps (30.0 secs, 3 samples)
Execl Throughput 2403.4 lps (29.8 secs, 3 samples)
File Read 1024 bufsize 2000 maxblocks 791326.0 KBps (30.0 secs, 3 samples)
File Write 1024 bufsize 2000 maxblocks 493043.0 KBps (30.0 secs, 3 samples)
File Copy 1024 bufsize 2000 maxblocks 281269.0 KBps (30.0 secs, 3 samples)
File Read 256 bufsize 500 maxblocks 318297.0 KBps (30.0 secs, 3 samples)
File Write 256 bufsize 500 maxblocks 196312.0 KBps (30.0 secs, 3 samples)
File Copy 256 bufsize 500 maxblocks 114647.0 KBps (30.0 secs, 3 samples)
File Read 4096 bufsize 8000 maxblocks 1351684.0 KBps (30.0 secs, 3
samples)
File Write 4096 bufsize 8000 maxblocks 427733.0 KBps (30.0 secs, 3 samples)
File Copy 4096 bufsize 8000 maxblocks 333182.0 KBps (30.0 secs, 3 samples)
Shell Scripts (1 concurrent) 2333.4 lpm (60.0 secs, 3 samples)
Shell Scripts (8 concurrent) 318.0 lpm (60.0 secs, 3 samples)
Shell Scripts (16 concurrent) 159.0 lpm (60.0 secs, 3 samples)
Arithmetic Test (type = short) 562871.6 lps (10.0 secs, 3 samples)
Arithmetic Test (type = int) 556462.6 lps (10.0 secs, 3 samples)
Arithmetic Test (type = long) 556522.1 lps (10.0 secs, 3 samples)
Arithmetic Test (type = float) 530795.0 lps (10.0 secs, 3 samples)
Arithmetic Test (type = double) 530983.1 lps (10.0 secs, 3 samples)
Arithoh 13096172.8 lps (10.0 secs, 3
samples)
C Compiler Throughput 780.9 lpm (60.0 secs, 3 samples)
Dc: sqrt(2) to 99 decimal places 92229.7 lpm (30.0 secs, 3 samples)
Recursion Test--Tower of Hanoi 86730.9 lps (20.0 secs, 3 samples)
INDEX VALUES
TEST BASELINE RESULT INDEX
Dhrystone 2 using register variables 116700.0 3611201.8 309.4
Double-Precision Whetstone 55.0 802.3 145.9
Execl Throughput 43.0 2403.4 558.9
File Copy 1024 bufsize 2000 maxblocks 3960.0 281269.0 710.3
File Copy 256 bufsize 500 maxblocks 1655.0 114647.0 692.7
File Copy 4096 bufsize 8000 maxblocks 5800.0 333182.0 574.5
Pipe Throughput 12440.0 702560.0 564.8
Process Creation 126.0 11890.8 943.7
Shell Scripts (8 concurrent) 6.0 318.0 530.0
System Call Overhead 15000.0 1095015.4 730.0
=========
FINAL SCORE 520.9
BYTE UNIX Benchmarks (Version 4.1.0)
System -- Linux serge.austin.ibm.com 2.6.12-rc2-stack #2 Wed Apr 13 16:47:38 CDT 2005 i686 i686
i386 GNU/Linux
Start Benchmark Run: Thu Apr 14 14:30:10 CDT 2005
1 interactive users.
14:30:10 up 8 min, 1 user, load average: 111.37, 484.28, 251.80
lrwxrwxrwx 1 root root 4 Jan 5 11:56 /bin/sh -> bash
/bin/sh: symbolic link to `bash'
/dev/hda3 20161204 15878484 3258580 83% /
Dhrystone 2 using register variables 3563782.9 lps (10.0 secs, 10
samples)
Double-Precision Whetstone 801.8 MWIPS (10.4 secs, 10
samples)
System Call Overhead 1084261.2 lps (10.0 secs, 10
samples)
Pipe Throughput 666514.3 lps (10.0 secs, 10
samples)
Pipe-based Context Switching 146425.5 lps (10.0 secs, 10
samples)
Process Creation 11820.7 lps (30.0 secs, 3 samples)
Execl Throughput 2518.4 lps (29.8 secs, 3 samples)
File Read 1024 bufsize 2000 maxblocks 780638.0 KBps (30.0 secs, 3 samples)
File Write 1024 bufsize 2000 maxblocks 496655.0 KBps (30.0 secs, 3 samples)
File Copy 1024 bufsize 2000 maxblocks 280480.0 KBps (30.0 secs, 3 samples)
File Read 256 bufsize 500 maxblocks 294455.0 KBps (30.0 secs, 3 samples)
File Write 256 bufsize 500 maxblocks 186746.0 KBps (30.0 secs, 3 samples)
File Copy 256 bufsize 500 maxblocks 109086.0 KBps (30.0 secs, 3 samples)
File Read 4096 bufsize 8000 maxblocks 1350343.0 KBps (30.0 secs, 3
samples)
File Write 4096 bufsize 8000 maxblocks 479821.0 KBps (30.0 secs, 3 samples)
File Copy 4096 bufsize 8000 maxblocks 369086.0 KBps (30.0 secs, 3 samples)
Shell Scripts (1 concurrent) 2380.9 lpm (60.0 secs, 3 samples)
Shell Scripts (8 concurrent) 323.7 lpm (60.0 secs, 3 samples)
Shell Scripts (16 concurrent) 163.0 lpm (60.0 secs, 3 samples)
Arithmetic Test (type = short) 562824.3 lps (10.0 secs, 3 samples)
Arithmetic Test (type = int) 556465.5 lps (10.0 secs, 3 samples)
Arithmetic Test (type = long) 556443.7 lps (10.0 secs, 3 samples)
Arithmetic Test (type = float) 530474.5 lps (10.0 secs, 3 samples)
Arithmetic Test (type = double) 530719.7 lps (10.0 secs, 3 samples)
Arithoh 13026111.8 lps (10.0 secs, 3
samples)
C Compiler Throughput 799.3 lpm (60.0 secs, 3 samples)
Dc: sqrt(2) to 99 decimal places 97581.1 lpm (30.0 secs, 3 samples)
Recursion Test--Tower of Hanoi 86501.1 lps (20.0 secs, 3 samples)
INDEX VALUES
TEST BASELINE RESULT INDEX
Dhrystone 2 using register variables 116700.0 3563782.9 305.4
Double-Precision Whetstone 55.0 801.8 145.8
Execl Throughput 43.0 2518.4 585.7
File Copy 1024 bufsize 2000 maxblocks 3960.0 280480.0 708.3
File Copy 256 bufsize 500 maxblocks 1655.0 109086.0 659.1
File Copy 4096 bufsize 8000 maxblocks 5800.0 369086.0 636.4
Pipe Throughput 12440.0 666514.3 535.8
Process Creation 126.0 11820.7 938.2
Shell Scripts (8 concurrent) 6.0 323.7 539.5
System Call Overhead 15000.0 1084261.2 722.8
=========
FINAL SCORE 522.6
199.135
199.419
198.793
197.881
199.753
197.514
198.788
195.684
197.963
199.099
207.87
205.668
203.238
204.763
205.482
203.463
204.168
204.98
204.39
207.253
1
real 4m53.340s
user 4m12.992s
sys 0m28.394s
2
real 4m42.507s
user 4m13.479s
sys 0m28.435s
3
real 4m43.986s
user 4m13.462s
sys 0m28.495s
4
real 4m42.890s
user 4m13.410s
sys 0m28.482s
real 4m49.405s
user 4m12.739s
sys 0m28.464s
2
real 4m42.661s
user 4m13.325s
sys 0m28.254s
3
real 4m43.414s
user 4m13.423s
sys 0m28.365s
4
real 4m42.300s
user 4m13.426s
sys 0m28.315s
|
|||||||||||||||||||