Date: Sun, 04 Apr 2004 18:13:03 +0200 From: Ivan Voras <ivoras@geri.cc.fer.hr> To: current@freebsd.org Subject: SMP+HTT performance Message-ID: <4070340F.3090804@geri.cc.fer.hr>
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People (me included) have been wondering what influence do HTT and SMP
have on system performance, so I made some benchmarks (bytebench 3.1):
** SMP kernel, SMP enabled
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
Processor is:
CPU: Intel(R) Pentium(R) 4 CPU 3.00GHz (3000.12-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0xf29 Stepping = 9
Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,C
MOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
Hyperthreading: 2 logical CPUs
FreeBSD is 5.2.1-release, scheduler is ULE.
So, it looks like anything that requires concurrency will suffer.
--
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