Date: Fri, 31 Jan 1997 23:20:19 +0300 (MSK) From: bag@sinbin.demos.su (Alex G. Bulushev) To: freebsd-smp@freebsd.org Cc: mishania@demos.su Subject: bytebench not correct for SMP kernel ? Message-ID: <199701312020.XAA18178@sinbin.demos.su>
next in thread | raw e-mail | index | archive | help
i run bytebench for nonSMP kernel, for SMP kernel(smp_active=0) and
for SMP kernel(smp_active=2) on the same hardware
fastes is nonSMP kernel, then SMP kernel(smp_active=0) and slowest
result for SMP kernel(smp_active=2)
some parameters decrease dramaticaly
nosmp smp smp
active=0 active=2
System Call Overhead Test lps 68192.2 51738.2 38070.8
Pipe Throughput Test lps 92324.9 68053.5 57780.3
Pipe-based Context Switching Test lps 40542.8 20177.0 8785.4
Process Creation Test lps 3256.4 2739.2 1568.9
Execl Throughput Test lps 1437.4 1206.6 1032.5
File Read (10 seconds) KBps 254626.0 190873.0 151645.0
File Read (30 seconds) KBps 255236.0 191890.0 152978.0
Dc: sqrt(2) to 99 decimal places lpm 9533.5 8497.6 7406.6
is it bytebench bug? what bench tests SMP corectly?
Alex.
BYTE UNIX Benchmarks (Version 3.11)
Asus P/I-P65UP5 with C-P6ND
dual P6-200, adaptec 3940W, 256 Mb RAM ECC
kernel/nosmp kernel/smp kernel/smp
smp_active=0 smp_active=2
Dhrystone 2 without register variables (10s, 6sampl) 445551.2 lps 448127.5 lps 448622.3 lps
Dhrystone 2 using register variables (10s, 6sampl) 449567.0 lps 451046.9 lps 451203.7 lps
Arithmetic Test (type = arithoh) (10s, 6sampl) 13243729.3 lps 13264989.4 lps 13268774.7 lps
Arithmetic Test (type = register) (10s, 6sampl) 54531.7 lps 54611.8 lps 54642.7 lps
Arithmetic Test (type = short) (10s, 6sampl) 33325.9 lps 33383.2 lps 33395.7 lps
Arithmetic Test (type = int) (10s, 6sampl) 54532.6 lps 54614.9 lps 54620.3 lps
Arithmetic Test (type = long) (10s, 6sampl) 54533.5 lps 54583.9 lps 54660.0 lps
Arithmetic Test (type = float) (10s, 6sampl) 60761.6 lps 60870.3 lps 60918.7 lps
Arithmetic Test (type = double) (10s, 6sampl) 60779.7 lps 60865.2 lps 60931.6 lps
System Call Overhead Test (10s, 6sampl) 68192.2 lps 51738.2 lps 38070.8 lps
Pipe Throughput Test (10s, 6sampl) 92324.9 lps 68053.5 lps 57780.3 lps
Pipe-based Context Switching Test (10s, 6sampl) 40542.8 lps 20177.0 lps 8785.4 lps
Process Creation Test (10s, 6sampl) 3256.4 lps 2739.2 lps 1568.9 lps
Execl Throughput Test ( 9s, 6sampl) 1437.4 lps 1206.6 lps 1032.5 lps
File Read (10 seconds) (10s, 6sampl) 254626.0 KBps 190873.0 KBps 151645.0 KBps
File Write (10 seconds) (10s, 6sampl) 3800.0 KBps 3800.0 KBps 3800.0 KBps
File Copy (10 seconds) (10s, 6sampl) 3286.0 KBps 3286.0 KBps 3286.0 KBps
File Read (30 seconds) (30s, 6sampl) 255236.0 KBps 191890.0 KBps 152978.0 KBps
File Write (30 seconds) (30s, 6sampl) 3600.0 KBps 3600.0 KBps 3600.0 KBps
File Copy (30 seconds) (30s, 6sampl) 1.0 KBps 3177.0 KBps 3236.0 KBps
C Compiler Test (60s, 3sampl) 169.9 lpm 177.5 lpm 169.3 lpm
Shell scripts (1 concurrent) (60s, 3sampl) 270.3 lpm 293.9 lpm 264.0 lpm
Shell scripts (2 concurrent) (60s, 3sampl) 149.0 lpm 170.6 lpm 150.3 lpm
Shell scripts (4 concurrent) (60s, 3sampl) 80.3 lpm 94.3 lpm 83.0 lpm
Shell scripts (8 concurrent) (60s, 3sampl) 40.3 lpm 40.0 lpm 42.0 lpm
Dc: sqrt(2) to 99 decimal places (60s, 6sampl) 9533.5 lpm 8497.6 lpm 7406.6 lpm
Recursion Test--Tower of Hanoi (10s, 6sampl) 5574.9 lps 5600.4 lps 5602.9 lps
INDEX VALUES
TEST INDEX INDEX INDEX
Arithmetic Test (type = double) 23.9 23.9 24.0
Dhrystone 2 without register variables 19.9 20.0 20.1
Execl Throughput Test 87.1 73.1 62.6
File Copy (30 seconds) 0.0 17.7 18.1
Pipe-based Context Switching Test 30.7 15.3 6.7
Shell scripts (8 concurrent) 10.1 10.0 10.5
========= ========= =========
SUM of 6 items 171.8 160.2 141.8
AVERAGE 28.6 26.7 23.6
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199701312020.XAA18178>