Date: Sun, 27 Mar 2005 08:57:53 +0930 From: "Paul A. Hoadley" <paulh@logicsquad.net> To: freebsd-questions@freebsd.org Subject: Re: hyper threading. Message-ID: <20050326232753.GA64620@grover.logicsquad.net> In-Reply-To: <49251524.20050326234521@wanadoo.fr> References: <c6ef380c050326061976f164b@mail.gmail.com> <1641928994.20050326192811@wanadoo.fr> <8C700529A2DFD74-A44-3A157@mblk-d34.sysops.aol.com> <439876144.20050326220638@wanadoo.fr> <8C7006AE7E80573-FAC-3B652@mblk-r28.sysops.aol.com> <49251524.20050326234521@wanadoo.fr>
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On Sat, Mar 26, 2005 at 11:45:21PM +0100, Anthony Atkielski wrote:
> Where can I see the measurements?
Here are some measurements. A few weeks ago I ran Unixbench 4.1.0
(/usr/ports/benchmarks/unixbench) on a P4 2.8GHz with and without
hyperthreading enabled. I note a slight difference in the 10 minute
load average in favour of the uniprocessor run (0.00 vs 0.10 in the
hyperthreading run), though I doubt this alone could account for a 15%
difference in total score.
Uniprocessor run:
-----------------
BYTE UNIX Benchmarks (Version 4.1.0)
System -- bigbird.logicsquad.net
Start Benchmark Run: Sun Feb 20 08:23:08 CST 2005
14 interactive users.
8:23AM up 3 days, 14:37, 14 users, load averages: 0.00, 0.00, 0.00
-r-xr-xr-x 1 root wheel 105624 Feb 12 00:09 /bin/sh
/bin/sh: ELF 32-bit LSB executable, Intel 80386, version 1 (FreeBSD), for=
FreeBSD 5.3-CURRENT (rev 1), dynamically linked (uses shared libs), stripp=
ed
/dev/mirror/gm0s1f 164607432 5190146 146248692 3% /usr
Dhrystone 2 using register variables 4438000.0 lps (10.0 secs, 10 sam=
ples)
Double-Precision Whetstone 786.2 MWIPS (10.4 secs, 10 samp=
les)
System Call Overhead 387391.7 lps (10.0 secs, 10 samp=
les)
Pipe Throughput 595757.1 lps (10.0 secs, 10 samp=
les)
Pipe-based Context Switching 94343.7 lps (10.0 secs, 10 samp=
les)
Process Creation 5143.3 lps (30.0 secs, 3 sampl=
es)
Execl Throughput 1127.4 lps (29.9 secs, 3 sampl=
es)
File Read 1024 bufsize 2000 maxblocks 637932.0 KBps (30.0 secs, 3 sampl=
es)
File Write 1024 bufsize 2000 maxblocks 86241.0 KBps (30.0 secs, 3 sampl=
es)
File Copy 1024 bufsize 2000 maxblocks 84790.0 KBps (30.0 secs, 3 sampl=
es)
File Read 256 bufsize 500 maxblocks 182188.0 KBps (30.0 secs, 3 sampl=
es)
File Write 256 bufsize 500 maxblocks 83127.0 KBps (30.0 secs, 3 sampl=
es)
File Copy 256 bufsize 500 maxblocks 53860.0 KBps (30.0 secs, 3 sampl=
es)
File Read 4096 bufsize 8000 maxblocks 1662218.0 KBps (30.0 secs, 3 samp=
les)
File Write 4096 bufsize 8000 maxblocks 47821.0 KBps (30.0 secs, 3 sampl=
es)
File Copy 4096 bufsize 8000 maxblocks 47003.0 KBps (30.0 secs, 3 sampl=
es)
Shell Scripts (1 concurrent) 2584.9 lpm (60.0 secs, 3 sampl=
es)
Shell Scripts (8 concurrent) 353.3 lpm (60.0 secs, 3 sampl=
es)
Shell Scripts (16 concurrent) 177.0 lpm (60.0 secs, 3 sampl=
es)
Arithmetic Test (type =3D short) 687842.3 lps (10.0 secs, 3 sam=
ples)
Arithmetic Test (type =3D int) 697114.1 lps (10.0 secs, 3 sam=
ples)
Arithmetic Test (type =3D long) 697313.5 lps (10.0 secs, 3 sam=
ples)
Arithmetic Test (type =3D float) 658678.8 lps (10.0 secs, 3 sam=
ples)
Arithmetic Test (type =3D double) 658663.3 lps (10.0 secs, 3 sam=
ples)
Arithoh 14359071.4 lps (10.0 secs, 3 sam=
ples)
C Compiler Throughput 1373.3 lpm (60.0 secs, 3 sampl=
es)
Dc: sqrt(2) to 99 decimal places 161336.3 lpm (30.0 secs, 3 sampl=
es)
Recursion Test--Tower of Hanoi 98086.8 lps (20.0 secs, 3 sampl=
es)
INDEX VALUES =20
TEST BASELINE RESULT INDEX
Dhrystone 2 using register variables 116700.0 4438000.0 380.3
Double-Precision Whetstone 55.0 786.2 142.9
Execl Throughput 43.0 1127.4 262.2
File Copy 1024 bufsize 2000 maxblocks 3960.0 84790.0 214.1
File Copy 256 bufsize 500 maxblocks 1655.0 53860.0 325.4
File Copy 4096 bufsize 8000 maxblocks 5800.0 47003.0 81.0
Pipe Throughput 12440.0 595757.1 478.9
Pipe-based Context Switching 4000.0 94343.7 235.9
Process Creation 126.0 5143.3 408.2
Shell Scripts (8 concurrent) 6.0 353.3 588.8
System Call Overhead 15000.0 387391.7 258.3
=3D=3D=3D=
=3D=3D=3D=3D=3D=3D
FINAL SCORE 270.4
Hyperthreading run:
-------------------
BYTE UNIX Benchmarks (Version 4.1.0)
System -- bigbird.logicsquad.net
Start Benchmark Run: Sun Feb 20 17:22:33 CST 2005
2 interactive users.
5:22PM up 2 mins, 2 users, load averages: 0.31, 0.23, 0.10
-r-xr-xr-x 1 root wheel 105624 Feb 12 00:09 /bin/sh
/bin/sh: ELF 32-bit LSB executable, Intel 80386, version 1 (FreeBSD), for=
FreeBSD 5.3-CURRENT (rev 1), dynamically linked (uses shared libs), stripp=
ed
/dev/mirror/gm0s1f 164607432 5264584 146174254 3% /usr
Dhrystone 2 using register variables 4463262.0 lps (10.0 secs, 10 sam=
ples)
Double-Precision Whetstone 785.8 MWIPS (10.5 secs, 10 samp=
les)
System Call Overhead 320010.4 lps (10.0 secs, 10 samp=
les)
Pipe Throughput 445274.8 lps (10.0 secs, 10 samp=
les)
Pipe-based Context Switching 60275.3 lps (10.0 secs, 10 samp=
les)
Process Creation 3614.9 lps (30.0 secs, 3 sampl=
es)
Execl Throughput 970.2 lps (30.0 secs, 3 sampl=
es)
File Read 1024 bufsize 2000 maxblocks 387635.0 KBps (30.0 secs, 3 sampl=
es)
File Write 1024 bufsize 2000 maxblocks 85403.0 KBps (30.0 secs, 3 sampl=
es)
File Copy 1024 bufsize 2000 maxblocks 81190.0 KBps (30.0 secs, 3 sampl=
es)
File Read 256 bufsize 500 maxblocks 103384.0 KBps (30.0 secs, 3 sampl=
es)
File Write 256 bufsize 500 maxblocks 59661.0 KBps (30.0 secs, 3 sampl=
es)
File Copy 256 bufsize 500 maxblocks 37122.0 KBps (30.0 secs, 3 sampl=
es)
File Read 4096 bufsize 8000 maxblocks 1204605.0 KBps (30.0 secs, 3 samp=
les)
File Write 4096 bufsize 8000 maxblocks 47284.0 KBps (30.0 secs, 3 sampl=
es)
File Copy 4096 bufsize 8000 maxblocks 46684.0 KBps (30.0 secs, 3 sampl=
es)
Shell Scripts (1 concurrent) 2476.7 lpm (60.0 secs, 3 sampl=
es)
Shell Scripts (8 concurrent) 360.7 lpm (60.0 secs, 3 sampl=
es)
Shell Scripts (16 concurrent) 181.0 lpm (60.0 secs, 3 sampl=
es)
Arithmetic Test (type =3D short) 692417.8 lps (10.0 secs, 3 sam=
ples)
Arithmetic Test (type =3D int) 701337.9 lps (10.0 secs, 3 sam=
ples)
Arithmetic Test (type =3D long) 701730.5 lps (10.0 secs, 3 sam=
ples)
Arithmetic Test (type =3D float) 663616.7 lps (10.0 secs, 3 sam=
ples)
Arithmetic Test (type =3D double) 663693.8 lps (10.0 secs, 3 sam=
ples)
Arithoh 14226118.2 lps (10.0 secs, 3 sam=
ples)
C Compiler Throughput 1357.7 lpm (60.0 secs, 3 sampl=
es)
Dc: sqrt(2) to 99 decimal places 110706.6 lpm (30.0 secs, 3 sampl=
es)
Recursion Test--Tower of Hanoi 100825.9 lps (20.0 secs, 3 sampl=
es)
INDEX VALUES =20
TEST BASELINE RESULT INDEX
Dhrystone 2 using register variables 116700.0 4463262.0 382.5
Double-Precision Whetstone 55.0 785.8 142.9
Execl Throughput 43.0 970.2 225.6
File Copy 1024 bufsize 2000 maxblocks 3960.0 81190.0 205.0
File Copy 256 bufsize 500 maxblocks 1655.0 37122.0 224.3
File Copy 4096 bufsize 8000 maxblocks 5800.0 46684.0 80.5
Pipe Throughput 12440.0 445274.8 357.9
Pipe-based Context Switching 4000.0 60275.3 150.7
Process Creation 126.0 3614.9 286.9
Shell Scripts (8 concurrent) 6.0 360.7 601.2
System Call Overhead 15000.0 320010.4 213.3
=3D=3D=3D=
=3D=3D=3D=3D=3D=3D
FINAL SCORE 228.9
--=20
Paul.
w http://logicsquad.net/
h http://paul.hoadley.name/
--KsGdsel6WgEHnImy
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