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 AnticlarkeReceived on Mon Apr 05 2004 - 01:07:21 UTC
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