Date: Tue, 22 Jan 2008 21:26:14 +0200 From: Stefan Lambrev <stefan.lambrev@moneybookers.com> To: Ivan Voras <ivoras@freebsd.org> Cc: freebsd-hackers@freebsd.org Subject: Re: gettimeofday() in hping Message-ID: <47964356.6030602@moneybookers.com> In-Reply-To: <fn5c7u$i7e$2@ger.gmane.org> References: <4795CC13.7080601@moneybookers.com> <868x2i3v8d.fsf@ds4.des.no> <864pd63v2h.fsf@ds4.des.no> <4795FE54.9090606@moneybookers.com> <86lk6i0vzk.fsf@ds4.des.no> <479605E2.6070709@moneybookers.com> <fn5c7u$i7e$2@ger.gmane.org>
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Hi, Ivan Voras wrote: > Stefan Lambrev wrote: > >> I do not have HEPT on the servers that I test, but simple test on my >> laptop shows >> that hping can generate with ACPI-fast ~4MB/s traffic, 5MB/s with HPET >> and 8MB/s with TSC. > > How much can Linux handle? Will install ubuntu on the same machine and let you know, but my experience shows that FreeBSD + TSC have the same performance as Linux. > > >I didn't check dummy time counter. > > If you do, it would give a nice indicator of how much the time > counters are expensive in both absolute terms and relative to the rest > of the stuff the program does (network IO). The "dummy" timecounter > just increments a number when called, no time keeping is involved. > > Here are the max speeds I can reach with different counters (on the test server): i8254 - 3.660 MB/s ACPI-fast - 7.137 MB/s TSC - 12.519 MB/s dummy - 12.366 MB/s -- Best Wishes, Stefan Lambrev ICQ# 24134177
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