Date: Tue, 18 Jan 2011 20:07:39 GMT From: Wojciech Puchar <wojtek@tensor.gdynia.p> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/154123: bge driver problems BCM5906 laptop Message-ID: <201101182007.p0IK7dsC018399@red.freebsd.org> Resent-Message-ID: <201101182010.p0IKABHV010475@freefall.freebsd.org>
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>Number: 154123 >Category: kern >Synopsis: bge driver problems BCM5906 laptop >Confidential: no >Severity: non-critical >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Tue Jan 18 20:10:11 UTC 2011 >Closed-Date: >Last-Modified: >Originator: Wojciech Puchar >Release: FreeBSD 8.2 >Organization: TENSOR ap >Environment: FreeBSD wojtek.tensor.gdynia.pl 8.2-PRERELEASE FreeBSD 8.2-PRERELEASE #2: Wed Jan 12 23:04:28 CET 2011 root@wojtek.tensor.gdynia.pl:/usr/src/sys/amd64/compile/wojtek amd64 >Description: bge face works slow. ping latencies are like 50-100ms when i put traffic on it, 6MB/s was most i can achieve sending to other machine at all, but without any tricks it's at most 2MB/s The trick is to put CPU speed down by setting dev.cpu.0.freq by sysctl THE SLOWER CPU the faster network! at 300MHz i was able to do 6MB/s, at full 2300MHz - 2MB/s was max! >How-To-Repeat: Buy lenovo G550 :) and try sending data to other computer >Fix: No idea. I don't have any idea how bge driver works and how broadcom chips work, but it seems that something tries to put more data at some moment that it should so it chokes. At lower CPU speed it happens more rarely. but it's only suggestion, i don't really have idea. >Release-Note: >Audit-Trail: >Unformatted:
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