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Re: Hang when testing with AMD64 with Tg3

To: Stephen Hemminger <shemminger@xxxxxxxx>
Subject: Re: Hang when testing with AMD64 with Tg3
From: Nivedita Singhvi <niv@xxxxxxxxxx>
Date: Tue, 05 Oct 2004 07:58:58 -0700
Cc: Andi Kleen <ak@xxxxxxx>, davem@xxxxxxxxxx, netdev@xxxxxxxxxxx
In-reply-to: <1096938308.22947.3.camel@xxxxxxxxxxxxxxxxxxxxx>
References: <1096935071.22155.6.camel@xxxxxxxxxxxxxxxxxxxxx> <20041005001527.GB13106@xxxxxxxxxxxxx> <1096938308.22947.3.camel@xxxxxxxxxxxxxxxxxxxxx>
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Stephen Hemminger wrote:
On Tue, 2004-10-05 at 02:15 +0200, Andi Kleen wrote:

On Mon, Oct 04, 2004 at 05:11:11PM -0700, Stephen Hemminger wrote:

Doing simple iperf test on new opteron with tg3 against existing Xeon
system.  I am seeing something wierd, the connection hangs right away.
Is this a TSO bug.
Sender: BK latest (2.6.9-rc3) Tg3 (XX.YY.250.3)
Receiver: BK + netdev(jeffm) + dave's latest e100 (XX.YY.1.73)

Both machines are directly connected with a netgear 100mbit switch.

IT ISN'T A NETWORK PROBLEM.  The problem is that iperf uses posix
pthread mutex's to sychronize and it looks like a futex bug.

might not be a futex bug - check to see if iperf does
any writes, fflushes, etc, in a signal handler - i.e.
that its signal handling is thread-safe. glibc now
makes it a fatal bug..


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