Date: Mon, 05 Apr 2004 12:03:39 +0200 From: Ivan Voras <ivoras@fer.hr> To: current@freebsd.org Subject: HTT & SMP kernel Message-ID: <40712EFB.6090000@fer.hr>
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Here are my measurements regarding the usefulness of FreeBSD 5.2.1 SMP
support with HTTP machines (bytebench 3.1):
** SMP kernel, SMP activated
TEST BASELINE RESULT INDEX
Arithmetic Test (type = double) 2541.7 771818.7 303.7
Dhrystone 2 without register variables 22366.3 4752705.6 212.5
Execl Throughput Test 16.5 971.9 58.9
File Copy (30 seconds) 179.0 48236.0 269.5
Pipe-based Context Switching Test 1318.5 72264.1 54.8
Shell scripts (8 concurrent) 4.0 380.6 95.2
=========
SUM of 6 items 994.5
AVERAGE 165.7
** SMP kernel, SMP disabled (kern.smp.disabled=1 in loader.conf)
TEST BASELINE RESULT INDEX
Arithmetic Test (type = double) 2541.7 770832.5 303.3
Dhrystone 2 without register variables 22366.3 4722643.0 211.1
Execl Throughput Test 16.5 976.0 59.2
File Copy (30 seconds) 179.0 48385.0 270.3
Pipe-based Context Switching Test 1318.5 86409.7 65.5
Shell scripts (8 concurrent) 4.0 440.3 110.1
=========
SUM of 6 items 1019.5
AVERAGE 169.9
** UP kernel
TEST BASELINE RESULT INDEX
Arithmetic Test (type = double) 2541.7 770802.1 303.3
Dhrystone 2 without register variables 22366.3 4831707.7 216.0
Execl Throughput Test 16.5 1406.9 85.3
File Copy (30 seconds) 179.0 48395.0 270.4
Pipe-based Context Switching Test 1318.5 117582.0 89.2
Shell scripts (8 concurrent) 4.0 547.6 136.9
=========
SUM of 6 items 1101.0
AVERAGE 183.5
It seems that, currently, performance will suffer on anything making use of
concurrency (multiple processes, etc.)
--
Every sufficiently advanced magic is indistinguishable from technology
- Arthur C Anticlarke
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