| To: | Baruch Even <baruch@xxxxxxxxx> |
|---|---|
| Subject: | Re: netif_rx packet dumping |
| From: | jamal <hadi@xxxxxxxxxx> |
| Date: | 03 Mar 2005 22:45:56 -0500 |
| Cc: | Stephen Hemminger <shemminger@xxxxxxxx>, John Heffner <jheffner@xxxxxxx>, "David S. Miller" <davem@xxxxxxxxxxxxx>, rhee@xxxxxxxxxxxx, Yee-Ting.Li@xxxxxxx, netdev@xxxxxxxxxxx |
| In-reply-to: | <4227A23C.5050300@xxxxxxxxx> |
| Organization: | jamalopolous |
| References: | <20050303123811.4d934249@xxxxxxxxxxxxxxxxx> <20050303125556.6850cfe5.davem@xxxxxxxxxxxxx> <1109884688.1090.282.camel@xxxxxxxxxxxxxxxx> <20050303132143.7eef517c@xxxxxxxxxxxxxxxxx> <1109885065.1098.285.camel@xxxxxxxxxxxxxxxx> <20050303133237.5d64578f.davem@xxxxxxxxxxxxx> <20050303135416.0d6e7708@xxxxxxxxxxxxxxxxx> <Pine.LNX.4.58.0503031657300.22311@xxxxxxxxxxxxx> <1109888811.1092.352.camel@xxxxxxxxxxxxxxxx> <20050303151606.3587394f@xxxxxxxxxxxxxxxxx> <4227A23C.5050300@xxxxxxxxx> |
| Reply-to: | hadi@xxxxxxxxxx |
| Sender: | netdev-bounce@xxxxxxxxxxx |
On Thu, 2005-03-03 at 18:48, Baruch Even wrote: > > The queue is there to handle short bursts of packets when the network > stack cannot handle it. The bad behaviour was the throttling of the > queue, Can you explain a little more? Why does the the throttling cause any bad behavior thats any different from the queue being full? In both cases, packets arriving during that transient will be dropped. > the smart schemes are not going to make it that much better if > the hardware/software can't keep up. consider that this queue could be shared by as many as a few thousand unrelated TCP flows - not just one. It is also used for packets being forwarded. If you factor that the system has to react to protect itself then these schemes may make sense. The best place to do it is really in hardware, but the closer to the hardware as possible is the next besr possible spot. cheers, jamal |
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