Date: Fri, 11 Jun 1999 11:28:09 -0400 From: "David E. Cross" <crossd@cs.rpi.edu> To: chris@calldei.com Cc: "David E. Cross" <crossd@cs.rpi.edu>, freebsd-hackers@FreeBSD.ORG, freebsd-smp@FreeBSD.ORG, crossd@cs.rpi.edu Subject: Re: High syscall overhead? Message-ID: <199906111528.LAA71507@cs.rpi.edu> In-Reply-To: Message from Chris Costello <chris@calldei.com> of "Fri, 11 Jun 1999 09:59:25 CDT." <19990611095925.V57174@holly.dyndns.org>
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Oops, here is some additional information from my system:
bash-2.02$ cat sc.c
int main (void)
{
int count=0;
for(count=0;count <10000000;++count)
getppid();
return 0;
}
bash-2.02$ cc -o sc sc.c
bash-2.02$ uptime
11:19AM up 3 hrs, 4 users, load averages: 0.01, 0.01, 0.00
bash-2.02$ time ./sc
real 0m18.523s
user 0m0.000s
sys 0m18.521s
bash-2.02$ (date;time ./sc;date) & (date;time ./sc;date) &
[3] 516
[4] 517
Fri Jun 11 11:21:51 EDT 1999
[1] Done time ./sc
Fri Jun 11 11:21:51 EDT 1999
[2] Done time ./sc
bash-2.02$
real 0m52.058s
user 0m0.000s
sys 0m52.056s
real 0m52.056s
user 0m0.000s
sys 0m52.053s
Fri Jun 11 11:22:43 EDT 1999
Fri Jun 11 11:22:43 EDT 1999
bash-2.02$ dmesg | head
Copyright (c) 1992-1999 FreeBSD Inc.
Copyright (c) 1982, 1986, 1989, 1991, 1993
The Regents of the University of California. All rights reserved.
FreeBSD 3.2-STABLE #0: Fri Jun 11 08:18:12 EDT 1999
root@phoenix.home:/usr/src/sys/compile/PHOENIX_DUAL
Timecounter "i8254" frequency 1193182 Hz
CPU: Pentium II/Xeon/Celeron (686-class CPU)
Origin = "GenuineIntel" Id = 0x652 Stepping=2
Features=0x183fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,<b24>>
real memory = 268435456 (262144K bytes)
avail memory = 257925120 (251880K bytes)
Programming 24 pins in IOAPIC #0
FreeBSD/SMP: Multiprocessor motherboard
cpu0 (BSP): apic id: 1, version: 0x00040011, at 0xfee00000
cpu1 (AP): apic id: 0, version: 0x00040011, at 0xfee00000
io0 (APIC): apic id: 2, version: 0x00170011, at 0xfec00000
Preloaded elf kernel "kernel" at 0xc02df000.
Probing for devices on PCI bus 0:
chip0: <Intel 82443BX host to PCI bridge> rev 0x03 on pci0.0.0
chip1: <Intel 82443BX host to AGP bridge> rev 0x03 on pci0.1.0
It is -STABLE from June 7th, mid-day.
--
David Cross | email: crossd@cs.rpi.edu
Systems Administrator/Research Programmer | Web: http://www.cs.rpi.edu/~crossd
Rensselaer Polytechnic Institute, | Ph: 518.276.2860
Department of Computer Science | Fax: 518.276.4033
I speak only for myself. | WinNT:Linux::Linux:FreeBSD
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