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Re: Route cache performance under stress

To: ralph+d@xxxxxxxxx, ralph@xxxxxxxxx
Subject: Re: Route cache performance under stress
From: "David S. Miller" <davem@xxxxxxxxxx>
Date: Tue, 10 Jun 2003 08:49:40 -0700 (PDT)
Cc: hadi@xxxxxxxxxxxxxxxx, xerox@xxxxxxxxxx, sim@xxxxxxxxxxxxx, fw@xxxxxxxxxxxxx, netdev@xxxxxxxxxxx, linux-net@xxxxxxxxxxxxxxx
In-reply-to: <Pine.LNX.4.51.0306092006420.12038@xxxxxxxxxxxx>
References: <008001c32eda$56760830$4a00000a@badass> <20030609195652.E35696@xxxxxxxxxxxxxxxx> <Pine.LNX.4.51.0306092006420.12038@xxxxxxxxxxxx>
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   From: Ralph Doncaster <ralph@xxxxxxxxx>
   Date: Mon, 9 Jun 2003 20:32:48 -0400 (EDT)
   
   Lastly from the software side Linux doesn't seem to have anything like
   BSD's parameter to control user/system CPU sharing.  Once my CPU load
   reaches 70-80%, I'd rather have some dropped packets than let the CPU hit
   100% and end up with my BGP sessions drop.

When packet (more specifically, software interrupt) processing
reaches a certain level, we offload the work into process context.

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