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: <20070220171809.GA26961@2ka.mipt.ru>
Date:	Tue, 20 Feb 2007 20:18:10 +0300
From:	Evgeniy Polyakov <johnpol@....mipt.ru>
To:	bert hubert <bert.hubert@...herlabs.nl>
Cc:	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 Tue, Feb 20, 2007 at 08:11:20PM +0300, Evgeniy Polyakov (johnpol@....mipt.ru) wrote:
> I would try it today - but it is a bit late in Moscow already - and
> there are some things to complete yet. So, tomorrow I will create a patch
> and run it, but I seriously doubt that there is _that_ high per-recvfrom 
> latency.

As of now - syscall which just copies 50 bytes from /dev/zero eats about
400-450 nanosecods per run (core duo 3.7 ghz).

-- 
	Evgeniy Polyakov
-
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/