Messages in this thread |  | | Date | Wed, 3 Oct 2001 11:14:41 -0400 (EDT) | From | jamal <> | Subject | Re: [announce] [patch] limiting IRQ load, irq-rewrite-2.4.11-B5 |
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On Wed, 3 Oct 2001, Ingo Molnar wrote:
Robert has a driver extension (part of Alexey's iputils) that cna generate in the 140Kpps (for 100Mbps) and about 900Kpps for the e1000, but i'll take a look at Simons stuff if it is available. Marc Boucher has something that is an in-kernel client/server as well.
> 10.0.3.4 is running vanilla 2.4.11-pre2 UP, a 466 MHz PII box with enough > RAM, using eepro100. The system effectively locks up - even in the full > knowledge of what is happening, i can hardly switch consoles, let alone do > anything like ifconfig eth0 down to fix the lockup. Until this kind of > load is present the only option is to power-cycle the box. SysRq does not > work.
use the netif_rx() return code and hardware flowcontrol to fix it.
> and frankly, this has been well-known for a long time - it's just since > Simon sent me this testcode that i realized how trivial it is. Alexey told > me about Linux routers effectively locking up if put under 100 mbit IRQ > load more than a year ago, when i first tried to fix softirq latencies. I > think if you are doing networking patches then you should be aware of it > as well. >
I am fully aware of it. We have progessed extensively since then. Look at NAPI.
> your refusal to accept this problem as an existing and real problem is > really puzzling me. >
I must have miscommunicated. I am not saying there is no problem otherwise i wouldnt be working on this to begin with. I am just against your shotgun approach.
cheers, jamal
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