Bug 155258 - xircom_cb much slower than xircom_tulip_cb
xircom_cb much slower than xircom_tulip_cb
Product: Fedora
Classification: Fedora
Component: kernel (Show other bugs)
i386 Linux
medium Severity low
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Assigned To: Dave Jones
Brian Brock
Depends On:
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Reported: 2005-04-18 12:55 EDT by Chris Tracy
Modified: 2015-01-04 17:18 EST (History)
2 users (show)

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Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2005-08-26 03:29:04 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Chris Tracy 2005-04-18 12:55:32 EDT
From Bugzilla Helper:
User-Agent: Mozilla/5.0 Galeon/1.2.10 (X11; Linux i686; U;) Gecko/20030412

Description of problem:
I recently upgraded my old Inspiron 5000 from FC1 to FC3.  Since the system
doesn't have built-in Ethernet, I've had a Xircom Cardbus Ethernet PCMCIA card
in it for years.  In FC3, the card uses the xircom_cb driver.

After the upgrade, I discovered that my network throughput had dropped significantly.  Whereas in 2.4.x, I could wget from another system on the LAN at
8-9MB/s (64-72Mbit) in FC3 I'm getting 2-3MB/s (16-24Mbit) from the same system
downloading the same test file.  Out of curiousity, I installed vanilla
and observed the same issue using the xircom_cb driver.  However, switching over
to the xircom_tulip_cb driver, my throughput is right back where it was in 2.4.x.

I've reported the issue to the linux-pcmcia list at infradead, but wanted to ask 
that you consider enabling the xircom_tulip_cb module in a future kernel update
to address this issue.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Install FC3 on an Inspiron 5000 with a Xircom Cardbus Ethernet PCMCIA card
2. Test throughput

Actual Results:  Throughput is much lower than it was in FC1.  (2.4.x)

Expected Results:  Throughput should be as good as 2.4.x.  (xircom_tulip_cb module should be
installed for now as a fallback)

Additional info:
Comment 1 Dave Jones 2005-07-15 16:10:17 EDT
An update has been released for Fedora Core 3 (kernel-2.6.12-1.1372_FC3) which
may contain a fix for your problem.   Please update to this new kernel, and
report whether or not it fixes your problem.

If you have updated to Fedora Core 4 since this bug was opened, and the problem
still occurs with the latest updates for that release, please change the version
field of this bug to 'fc4'.

Thank you.
Comment 2 Chris Tracy 2005-08-13 13:19:40 EDT
Unfortunately, this system is now in production using a different card, so I am
currently unable to test the fix in the new kernel.  I don't know that I'll have
an opportunity in the near future, so if you'd like to close the bug for now, I
have no objection.

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