gettimeofday() in hping

Dag-Erling Smørgrav des at des.no
Tue Jan 22 06:32:53 PST 2008


Daniel Eischen <deischen at freebsd.org> writes:
> Not to discount any of your suggestions, but isn't the better
> performance of gettimeofday() (and perhaps clock_gettime() also)
> in Linux because they have access to the time in userland and
> can implement it without a system call?  I seem to recall this
> being mentioned before, I could be wrong...

Please don't bring this up again.  Search the archives instead.  There
are very good reasons why this was solved the way it was in FreeBSD.
Executive summary:

 a) gettimeofday() *is* a system call in Linux.
 b) gettimeofday() is slow in FreeBSD because it is correct.

DES
-- 
Dag-Erling Smørgrav - des at des.no


More information about the freebsd-hackers mailing list