On 5/11/2005 13:57, Tuomo Latto wrote: > Subhro wrote: > ... > >> In Device Polled systems, the NIC does not generate any interrupt at >> all. Instead whenever the packets arrive at a Network interface, they >> are captured and put into a queue. The kernel scheduler checks the >> quese at regular intervals and processes the packets which are >> waiting. This interval is adjusted by the "options HZ=x" kernel option. >> >> If the value of x is very high, there may eb two scenarios. In the >> first scenario, the queue may fill up and subsequent packets are >> dropped. In this case retransmission of the packets are required. In >> the second scenario, the packets would be held up for excessive long >> times which defeats the entire purpose of Device Polling. If the >> value of x is very low, the scheduler would check the queue >> frequently and would again defeat the entire idea of Device Polling. > > > It's the other way around. Large values indicate larger polling frequency > thus amounting to more checks. Or at least the name of the option would > suggest that anyway. > > Silly me :(. I meant something, typed something else. Its indeed the other way round. Thanks to everyone who pointed this out. Regards S.Received on Wed May 11 2005 - 13:11:34 UTC
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