I actually upped the buffer count to 8192 buffers instead of 10k. Of the 74
samples I have thus far, 57 have been clean of errors. Most of the sample
errors appear to be shortly after the cache flush.
I am going to let the buffers run for a bit longer then I have to go. I have
a five hour drive ahead of me.
On Friday 14 January 2005 01:00 pm, Jeremy M. Guthrie wrote:
> These stats are from the driver Jesse instrumented.
> ethtool -S eth3 | egrep -v ": 0"
> NIC statistics:
> rx_packets: 1130958533
> tx_packets: 5
> rx_bytes: 2373643298
> tx_bytes: 398
> rx_errors: 4388190
> rx_dropped: 1486253
> rx_fifo_errors: 2901937
> rx_missed_errors: 2901937
> rx_long_byte_count: 582194228258
> rx_csum_offload_good: 1040376597
> int_tx_desc: 4
> int_tx_queueempty: 5
> int_link_state: 1
> int_rx_desc_min_thresh: 20704
> int_rx_fifo_ovr: 1208
> int_rx_timer: 331925913
> int_rxcfg: 1
> rx_csum_offload_errors: 325045
> I am seeing more times w/ his driver where I run at zero errors. Of the
> last 877 samples since I switched drivers, I see 231 samples w/ zero
> On Friday 14 January 2005 10:05 am, Robert Olsson wrote:
> > Jeremy M. Guthrie writes:
> > > I ran a script overnight using the modified driver you had given me
> > > Robert. it is interesting that there is almost always errors in the
> > > interface even though we aren't getting dst-cache errors and running ~
> > > 40% free CPU now. I am going to switch over to Jesse's driver to see
> > > if his instrumentation helps nail down where the problem is.
> > >
> > >
> > > rx_packets: 2722676103
> > > tx_packets: 5
> > > rx_bytes: 1171335471
> > > tx_bytes: 398
> > > rx_errors: 8558366
> > > tx_errors: 0
> > > rx_dropped: 1951692
> > It might come from be periodic work from GC process correlate drops w.
> > rtatat.
> > I think the GC process can be made more smooth but studies and
> > experimentation is probably needed as GC process is quite complex. Maybe
> > some looked into this already?
> > Also you reported less drops when you increased the size of the RX ring
> > and I see higher system performance with smaller RX rings. Both
> > statements may actually be true. Big rings size may buffer during
> > periodic work as GC.
> I am running w/ 2048 input buffers. I am going to increase to 10K and try
> > Also I have an experimental patch so you route without the route hash as
> > a comparison. You have to be brave...
> I am about 300 miles from the machine this week and next week though I
> might be able to try it this weekend while I am home.
> > BTW we had this thread going for week,
> Pardon me for being a bit naive but I am not understanding this last
Jeremy M. Guthrie jeremy.guthrie@xxxxxxxxxx
Senior Network Engineer Phone: 608-298-1061
Berbee Fax: 608-288-3007
5520 Research Park Drive NOC: 608-298-1102
Madison, WI 53711
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