Date: Tue, 13 Jul 1999 10:28:05 -0400 (EDT) From: "Brian F. Feldman" <green@FreeBSD.org> To: Peter Jeremy <jeremyp@gsmx07.alcatel.com.au> Cc: dillon@apollo.backplane.com, freebsd-current@FreeBSD.org Subject: Re: LOCK overheads (was Re: "objtrm" problem probably found) Message-ID: <Pine.BSF.4.10.9907131026080.76301-100000@janus.syracuse.net> In-Reply-To: <99Jul13.202011est.40341@border.alcanet.com.au>
next in thread | previous in thread | raw e-mail | index | archive | help
Here's another data point:
{"/home/green"}$ cc -O2 locktests.c -o locktests
{"/home/green"}$ ./locktests
mode 0 10.92 ns/loop nproc=1 lcks=EMPTY
mode 1 17.99 ns/loop nproc=1 lcks=no
mode 2 17.97 ns/loop nproc=2 lcks=no
mode 3 166.33 ns/loop nproc=1 lcks=yes
mode 4 167.91 ns/loop nproc=2 lcks=yes
mode 5 42.16 ns/loop nproc=1 lcks=no
mode 6 41.60 ns/loop nproc=2 lcks=no
mode 7 188.86 ns/loop nproc=1 lcks=yes
mode 8 191.56 ns/loop nproc=2 lcks=yes
This is a K6-2 350. Locks are pretty expensive on them.
Brian Fundakowski Feldman _ __ ___ ____ ___ ___ ___
green@FreeBSD.org _ __ ___ | _ ) __| \
FreeBSD: The Power to Serve! _ __ | _ \._ \ |) |
http://www.FreeBSD.org/ _ |___/___/___/
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-current" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.BSF.4.10.9907131026080.76301-100000>