Date: Sat, 5 Jan 2008 16:05:05 GMT From: Laurent Frigault <lfrigault@agneau.org> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/119361: bge(4) transmit performance problem Message-ID: <200801051605.m05G55f6074903@www.freebsd.org> Resent-Message-ID: <200801051610.m05GA32M037341@freefall.freebsd.org>
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>Number: 119361
>Category: kern
>Synopsis: bge(4) transmit performance problem
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sat Jan 05 16:10:03 UTC 2008
>Closed-Date:
>Last-Modified:
>Originator: Laurent Frigault
>Release: 7.0BETA4
>Organization:
>Environment:
FreeBSD bge.free.org 7.0-BETA4 FreeBSD 7.0-BETA4 #0: Wed Dec 12 12:31:02 CET 2007 root@bge.free.org:/usr/src/sys/amd64/compile/GENERIC amd64
>Description:
We are experiencing a problem with BCM5721 bge interfaces, which seems to
be able to receive at almost 1Gbps but can only transmit at < 540Mbps.
Our test server is as Dell PE860
CPU: Intel(R) Xeon(R) CPU X3220 @ 2.40GHz (2400.10-MHz K8-class CPU)
Origin = "GenuineIntel" Id = 0x6fb Stepping = 11
Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
Features2=0xe3bd<SSE3,RSVD2,MON,DS_CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM>
AMD Features=0x20100800<SYSCALL,NX,LM>
AMD Features2=0x1<LAHF>
Cores per package: 4
usable memory = 8577101824 (8179 MB)
avail memory = 8297656320 (7913 MB)
bge0@pci0:4:0:0: class=0x020000 card=0x01e61028 chip=0x165914e4 rev=0x11 hdr=0x00
vendor = 'Broadcom Corporation'
device = 'BCM5721 NetXtreme Gigabit Ethernet PCI Express'
class = network
subclass = ethernet
bge1@pci0:5:0:0: class=0x020000 card=0x01e61028 chip=0x165914e4 rev=0x11 hdr=0x00
vendor = 'Broadcom Corporation'
device = 'BCM5721 NetXtreme Gigabit Ethernet PCI Express'
class = network
subclass = ethernet
We ran the following test with FreeBSD 6.3-PRERELEASE/i386 , FreeBSD
7.0BETA4/amd64 (ULE and BSD, with and without POLLING).
# dd if=/dev/zero bs=1m count=102400 | nc peer 15000
no firewall on the server.
netstat -i show no errors
interface forced 1000baseTX duplex-full on both server and switch, no autoneg.
The server as 2 bge interfaces, and both have the same problem.
Peer was running 6.3-PRERELEASE/amd64 with an em interface
on peer we run :
nc -l 15000 >/dev/null
If we boot our test server with a linux ubuntu 6.0.6 and run the same test, we
can transmit at more than 900 Mbps so it is not an hardware problem. But
we would like to stay away from linux on our servers.
Is there any patch/fix available for this driver ?
Unfortunately our server has no more slot available so we can't forget the bge
interfaces and add an em interface.
I can run tests on a spare server if needed (same hardware).
>How-To-Repeat:
dd if=/dev/zero bs=1m count=102400 | nc peer 15000
with nc -l 15000 >/dev/null on a peer server
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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