Date: Wed, 23 Jan 2008 17:02:02 +0100 From: "Ivan Voras" <ivoras@freebsd.org> To: "Stefan Lambrev" <stefan.lambrev@moneybookers.com> Cc: freebsd-hackers@freebsd.org Subject: Re: gettimeofday() in hping Message-ID: <9bbcef730801230802n5c52832bk60c6afc47be578f4@mail.gmail.com> In-Reply-To: <479754E6.1060101@moneybookers.com> References: <4795CC13.7080601@moneybookers.com> <4795FE54.9090606@moneybookers.com> <86lk6i0vzk.fsf@ds4.des.no> <479605E2.6070709@moneybookers.com> <fn5c7u$i7e$2@ger.gmane.org> <47964356.6030602@moneybookers.com> <479647FB.3070909@FreeBSD.org> <47970EE2.5000400@moneybookers.com> <fn7evj$smv$1@ger.gmane.org> <479754E6.1060101@moneybookers.com>
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On 23/01/2008, Stefan Lambrev <stefan.lambrev@moneybookers.com> wrote: > Greets, > > Now I have final results with Linux and FreeBSD on the same hardware > CPU: Intel(R) Xeon(R) CPU 3070 @ 2.66GHz - dual core > Lan: em0@pci0:3:0:0: class=0x020000 card=0x10bc8086 chip=0x10bc8086 > rev=0x06 hdr=0x00 > vendor = 'Intel Corporation' > device = '82571EB Gigabit Ethernet Controller (Copper)' > class = network > subclass = ethernet > > FreeBSD releng_7_0 from today - amd64, sched_ule. > > ACPI-Fast - 6.187 MB/s > TSC - 9.455 MB/s > dummy - 9.577 MB/s > > Linux rambo2 2.6.22-14-generic #1 SMP Tue Dec 18 05:28:27 UTC 2007 > x86_64 GNU/Linux - kubuntu > > TSC - 19.456 MB/s > acpi_pm - 15.394 MB/s > jiffies - 19.480 MB/s > > This is really not what I expected. For once, it's something I expected :) I just hope it isn't one of those cases where Kris absolutely cannot reproduce it and arrives at numbers in favour of FreeBSD :) (just joking here, absolutely no ill feelings involved). It would be helpful if you post exact command line arguments from all cases. > The other thing that bothers me is, that under freebsd is quite easy to get: > [send_ip] sendto: No buffer space available > It happens almost always on my laptop just few seconds after I start > hping with timecounter=TSC I'm not sure, but from what I understood of Robert Watson's explanation in the big ZFS thread on -current, maybe increasing kmem_size (exactly as for ZFS...) could help you with these buffers.
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