ethtool not in default system anymore?

Gregory Maxwell gmaxwell at
Wed Oct 13 00:16:49 UTC 2010

On Tue, Oct 12, 2010 at 8:01 PM, Chris Adams <cmadams at> wrote:
> Once upon a time, Gregory Maxwell <gmaxwell at> said:
>> On Tue, Oct 12, 2010 at 7:28 PM, Chris Adams <cmadams at> wrote:
>> > I noticed that ethtool is not in the default install anymore (probably
>> > for a release or so, but I didn't notice it until now).  Why is that?
>> > It is the only tool that can show and configure a variety of network
>> > device options, such as speed/duplex negotiation, wake-on-LAN, and TCP
>> > offloading.  There is support in the ifcfg-eth* files for calling it as
>> > part of interface setup (don't know if that's carried forward to NM,
>> > should be considered a bug in NM if not).
>> mii-tool.
> Does that work with all NICs now?  I used to run into NICs that it
> didn't handle (but ethtool did).  I haven't looked at mii-tool in a
> while though.
> In any case, that handles one thing that ethtool does (speed/duplex);
> what about the rest?  Also, AFAIK there's no nice hook to run mii-tool
> (or anything else) in ifup-eth like there is for ethtool.

I don't know— but it also won't let you adjust things like interrupt
mitigation— which is essential for low latency audio over the network
because lots of cards go into idiotic buffering modes at fairly low
PPS rates and the latency shoots through the roof... (my use case)

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