linux-kernel - Re: all syscalls initially taking 4usec on a P4? Re: nonblocking UDPv4 recvfrom() taking 4usec @ 3GHz?

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20070221113409.GA28479@one.firstfloor.org>
Date:	Wed, 21 Feb 2007 12:34:09 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Evgeniy Polyakov <johnpol@....mipt.ru>
Cc:	bert hubert <bert.hubert@...herlabs.nl>,
	Andi Kleen <andi@...stfloor.org>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: all syscalls initially taking 4usec on a P4? Re: nonblocking UDPv4 recvfrom() taking 4usec @ 3GHz?

On Wed, Feb 21, 2007 at 02:06:34PM +0300, Evgeniy Polyakov wrote:
> Here is data for 50 bytes reading for essentially idle machine 
> (core duo 2.4 ghz):
> 
> delta for syscall: 3326961404-3326969261: 7857 cycles = 3.273750 us

Can you oprofile it too?

-Andi
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/