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Re: Fwd: Re: e1000 1sec latency problem

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[view original message]
From: Martin Rogge <marogge@...>
To: <e1000-devel@...>, <linux-kernel@...>
Subject: Re: Fwd: Re: e1000 1sec latency problem
Date: Saturday, February 9, 2008 - 4:00 pm

Just for the records, I googled the following solution for the Lenovo T60:


(a) use the e1000 driver

(b) if compiling as a module, add the following parameter to modprobe.conf:

options e1000 RxIntDelay=5

(c) if compiling a static driver, use the following patch (based on 2.6.24):


--- e1000_param.c.orig	2008-01-24 23:58:37.000000000 +0100

+++ e1000_param.c	2008-02-09 20:42:23.000000000 +0100

@@ -158,7 +158,7 @@

  * Valid Range: 0-65535

  */

 E1000_PARAM(RxIntDelay, "Receive Interrupt Delay");

-#define DEFAULT_RDTR                   0

+#define DEFAULT_RDTR                   5

 #define MAX_RXDELAY               0xFFFF

 #define MIN_RXDELAY                    0


After reboot, the average ping time is still factor 10 worse than it should

be, but it stays below 2 ms (which is a remarkable improvement compared to

1000 ms).


Martin

--
[view original message]
From: Kok, Auke <auke-jan.h.kok@...>
To: Martin Rogge <marogge@...>
Cc: <e1000-devel@...>, <linux-kernel@...>
Subject: Re: Fwd: Re: e1000 1sec latency problem
Date: Saturday, February 9, 2008 - 5:51 pm

correct, this was a workaround which improved things for most people, but did not

*fix* it.


the real fix is to disable L1 ASPM alltogether at the cost of more power

consumption, which is what is in e1000e in 2.6.25-git.


Cheers,


Auke


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[view original message]
From: Ray Lee <ray-lk@...>
To: Kok, Auke <auke-jan.h.kok@...>
Cc: Martin Rogge <marogge@...>, <e1000-devel@...>, <linux-kernel@...>
Subject: Re: Fwd: Re: e1000 1sec latency problem
Date: Saturday, February 9, 2008 - 6:01 pm

e1000e doesn't recognize his NIC. Will you be adding this to the e1000

driver as well?

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[view original message]
From: Kok, Auke <auke-jan.h.kok@...>
To: Ray Lee <ray-lk@...>
Cc: Kok, Auke <auke-jan.h.kok@...>, Martin Rogge <marogge@...>, <e1000-devel@...>, <linux-kernel@...>
Subject: Re: Fwd: Re: e1000 1sec latency problem
Date: Saturday, February 9, 2008 - 7:38 pm

no, from 2.6.25 onwards e1000e will support 82573 nics, so you'll have to migrate

drivers, and you will get the fix automatically that way.


after 2.6.25 releases, support for all pci-e nics will be removed from the e1000

driver.


Cheers


Auke

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