From: "Paul Rolland" <rol@as2917.net>
To: "'Zwane Mwaikambo'" <zwane@linuxpower.ca>
Cc: "'Corey Minyard'" <minyard@acm.org>, <linux-kernel@vger.kernel.org>
Subject: Re: e100 latency, cpu cycle saver and e1000...
Date: Thu, 22 May 2003 07:49:21 +0200 [thread overview]
Message-ID: <019c01c32025$e4d2b9c0$3f00a8c0@witbe> (raw)
In-Reply-To: <Pine.LNX.4.50.0305211848130.25777-100000@montezuma.mastecende.com>
Hello,
> One thing you can do to reduce packet handling latency (at
> the cost of
> CPU) with both the e1000 is drop down the RX Delay Interrupt
> timers, ditto
> for the Tx Delay. The hardware delays in increments of 1.024ms
>
That's right, though the driver is not exhibiting a R/W /proc interface,
which probably means I'll have to reboot the server.
However, what I'm trying to figure out is : why did this latency
change suddenly, if it can't be related to a CPU Cycle Saver, as
the code doesn't seem to contain something that would allow a dynamic
change of such a parameter on a running machine...
Of course, the problem may be completely unrelated to the NIC,
my initial question being : is there a CPU Cycle Saver on the e1000
as there is one on the e100... ;-)
Regards,
Paul
next prev parent reply other threads:[~2003-05-22 5:36 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-21 8:51 e100 latency, cpu cycle saver and e1000 Paul Rolland
2003-05-21 14:06 ` Corey Minyard
2003-05-21 14:15 ` Paul Rolland
2003-05-21 22:50 ` Zwane Mwaikambo
2003-05-22 5:49 ` Paul Rolland [this message]
2003-05-22 5:46 ` Zwane Mwaikambo
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