Suggestions on Avoiding syscall Overhead

Poul-Henning Kamp phk at
Tue Apr 24 20:16:48 UTC 2007

In message <86r6q9hnbs.fsf at>, Dag-Erling =?iso-8859-1?Q?Sm=F8rgrav?= 
>des at (Dag-Erling Sm=F8rgrav) writes:
>> gettimeofday(2) returns a value in microseconds, but this does not
>> necessarily mean that it has microsecond precision.


s/precision/& or resolution/

Can I recommend that you not try the timestamping functions first,
get something simple like uname(2) working first, then contact
me and I'll help you get timecounters involved.

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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