Thread (209 messages) 209 messages, 18 authors, 2003-06-17

Re: Route cache performance under stress

From: David S. Miller <hidden>
Date: 2003-06-09 13:22:17

Possibly related (same subject, not in this thread)

   From: Jamal Hadi [off-list ref]
   Date: Mon, 9 Jun 2003 09:22:11 -0400 (EDT)
   
   I dont think youll see much benefit with 1 or 2 entries. I was thinking
   more along the lines of people with over 100K entries total;

You simply don't want the chains to get that long.  In my experience,
even with prefetching tricks, past 2 or 3 entry deep hash chains you
run into serious problems.

TCP has the same issue BTW, in fact DoS-like behavior is the common
thing there.  Every time you create a new TCP connection on a server
it's exactly like a routing cache miss.

   Let me run with this and get back to you.

Ok.
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