stubbs@ncr-sd.UUCP (Jan Stubbs) (02/11/86)
IOCALL, A UNIX SYSTEM PERFORMANCE BENCHMARK
The final results are below. Thanks everybody. I won't post again
until I get some significant new results. How about an IBM/RT, somebody?
Send your results to me directly. The benchmark is a "C" program
which measures Unix kernel performance.
time iocall Send all 3 times (user, system, real)
I am reporting the system time only.
"The opinions expressed herein are those of the author. Your mileage may vary".
Benchmark should be run on an otherwise idle machine. If you can please run them so, it does improve the timings.
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/*This benchmark tests speed of Unix system call interface
and speed of cpu doing common Unix io system calls. */
char buf[512];
int fd,count,i,j;
main()
{
fd = creat("/tmp/testfile",0777);
close(fd);
fd = open("/tmp/testfile",2);
unlink("/tmp/testfile");
for (i=0;i<=1000;i++) {
lseek(fd,0L,0); /* add this line! */
count = write(fd,buf,500);
lseek(fd,0L,0); /* second argument must be long */
for (j=0;j<=3;j++)
count = read(fd,buf,100);
}
}
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SYSTEM UNIX VERSION SYSTEM TIME SECONDS
----------- ---------------- -------------------
Dec Pro-380 2.9 BSD 18.4
MicroVax I Ultrix V1.1 18.0
DEC Rainbow100 w/NECV20 Venix/86 14.8 *d
Onyx C8002s Z8000 SIII 13.7 *a
Onyx C8002 Z8000 v7 13.0
TIL NS32016 9MHz No Wait states Local Port 12.2
PC/AT w/Sritek M68000 SV/68 Rel2 V1.0 11.36
Tandy 6000 8Mhz M68000 Xenix 3.0 10.9
ATT 3b2/300 SV 10.3
VAX 11/750 4.2 BSD 10.0
PLexus P35 12.5 MHz M68000 SIII 9.8
PDP 11/44 ISR 2.9 BSD 9.5
Motorola S2000 10MHz M68000 SV/68 Rel1 9.42
VAX 11/750 4.3 BSD 9.0
Sun-2 10MHz 68010 4.2 BSD Rel 2.0 9.0
VAX 11/750 SV.2 8.8
Sun-2 10MHz 68010 4.2 BSD Rel 3.0 8.7
Plexus P60 M68000 SIII 8.7
PE 3220 V7 Workbench 8.5 *a
ATT 3b2/400 SV.2 8.3
VAX 11/750 research version 8 8.1
VAX 11/750 4.1 BSD 7.2
Radio Shack 16A Xenix (v7) 7.2
VAX 11/750 4.1BSD (lightly hacked) 6.97
PC/AT Venix 5.2 6.8
ATT7300 Unix PC 10MHz 68010 SV.2 6.4
Concurrent 3230 Xelos Rel R01 (SV) 6.4 *b
Gould PN6080 UTX 1.1C 6.2 *b
Pyramid 90x w/cache OSx2.5 6.1
Appollo DN300 10 MHz M68000 Domain/IX 6.0 *e
Pyramid 90x w/cache OSx2.3 5.8
Plessey Mantra 12.5Mhz 68000 Uniplus SV Release 0 5.5
VAX 11/780 4.2 BSD 5.3
Concurrent 3250XP Xelos Rel R01 (SV) 5.2 *b
MicroVax II Ultrix 1.1 5.2
HP9000-550 3cpu's HP-UX 5.01 5.1 *c
PC/AT 7.5 Mhz Venix286 SV.2 5.1
VAX 11/780 SV.2 5.0
Convex C-1 4.2 BSD 4.6
IBM 4341 II UTS 2.4(V7 on VM) 4.23 *b
VAX 11/785 4.3 BSD 3.6
Sun-3/75 16.67Mhz 68020 4.2 BSD 3.6
Sun-3/160M-4 16.67Mhz 68020 4.2 BSD Rel 3.0 Alpha 3.6
Apollo Dn330 12Mhz M68020 Domain/IX 3.0 *e
VAX 11/785 SV.2 3.0
Gould Concept/97 UTX/32 1.2 (4.3BSD/SV2) 2.78
GEC 63/40 S 5.1 2.7
Gould PN9080 UTX 1.2 (4.3BSD) 2.5
Sperry 7000/40 aka CCI 6/32 4.2 BSD 1.9
VAX 8600 4.3 BSD 1.2
VAX 8600 Ultrix 1.2-1 1.1
IBM 3083 UTS SV 1.0 *b
Amdahl 470/V8 UTS/V (SV Rel 2,3)V1.1+ .98 *b
Cray X/MP-24 SysV (Pre release 8) .38 *b
Notes:
*a
This result obtained with original version of IOCALL which crosses the 512
512 byte buffer boundary, and this version of Unix has buffers of 512 bytes.
This is believed to be the case with all Version 7 and SIII derived OS's. It
will result in a 1001 writes being done which uses significantly more cpu time
and makes these results comparable only to others with the same problem. See
discussion above. 2.9 BSD????
*b
This result was obtained with a system which probably had other
programs running at the time the result was obtained. Submitter is
requested to rerun if possible when system is idle. This will improve
the result somewhat.
*c
Multi-cpu system. IOCALL was run single thread, which probably did not
utilize all cpu's. This system probably has considerably more power than
is reflected by the result.
*e
Real time reported because system time appeared to be unreasonable.
Jan Stubbs ....sdcsvax!ncr-sd!stubbs
619 485-3052
NCR Corp.
San Diego