Date: Tue, 22 Jan 2008 08:34:15 -0500 (EST) From: Daniel Eischen <deischen@freebsd.org> To: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no> Cc: freebsd-hackers@freebsd.org, Stefan Lambrev <stefan.lambrev@moneybookers.com> Subject: Re: gettimeofday() in hping Message-ID: <Pine.GSO.4.64.0801220831360.4862@sea.ntplx.net> In-Reply-To: <864pd63v2h.fsf@ds4.des.no> References: <4795CC13.7080601@moneybookers.com> <868x2i3v8d.fsf@ds4.des.no> <864pd63v2h.fsf@ds4.des.no>
index | next in thread | previous in thread | raw e-mail
On Tue, 22 Jan 2008, Dag-Erling Smørgrav wrote: > Dag-Erling Smørgrav <des@des.no> writes: >> Stefan Lambrev <stefan.lambrev@moneybookers.com> writes: >>> I tried clock_gettime() (using CLOCK_REALTIME for clock_id), but this >>> yield worse performance. >> Try CLOCK_MONOTONIC instead. > > I forgot - there are also the FreeBSD-specific CLOCK_REALTIME_FAST and > CLOCK_MONOTONIC_FAST if you can live with a little bit of jitter. 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... -- DEhome | help
Want to link to this message? Use this
URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.GSO.4.64.0801220831360.4862>