Date: Wed, 13 Jul 2005 19:53:57 GMT From: Christian Wittenhorst <wiwi@progon.net> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/83406: SMP: em/bge drivers: severe performance loss Message-ID: <200507131953.j6DJrvWP070591@www.freebsd.org> Resent-Message-ID: <200507132000.j6DK0bnl009887@freefall.freebsd.org>
next in thread | raw e-mail | index | archive | help
>Number: 83406 >Category: kern >Synopsis: SMP: em/bge drivers: severe performance loss >Confidential: no >Severity: critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Wed Jul 13 20:00:36 GMT 2005 >Closed-Date: >Last-Modified: >Originator: Christian Wittenhorst >Release: 5.4-RELEASE-p4 >Organization: progon network engineering >Environment: FreeBSD silver.kanti-zug.ch.internal 5.4-RELEASE-p4 FreeBSD 5.4-RELEASE-p4 #1: Wed Jul 13 19:15:08 UTC 2005 root@silver.kanti-zug.ch.internal:/usr/src/sys/i386/compile/silver i386 >Description: On a dual Intel Xeon server (ASUS NCL-DS motherboard) the network performance drops dramatically when SMP is enabled. Figures are: FTP 20MBps->3MBps, Samba 25MBps->2MBps, NFS 27MBps->1.7MBps. This affects at least em and bge drivers. No errors in any log. Disk performance is not affected! >How-To-Repeat: >Fix: sysctl machdep.cpu_idle_hlt=0 restores the original performance >Release-Note: >Audit-Trail: >Unformatted:
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200507131953.j6DJrvWP070591>