Re: [take13 1/3] kevent: Core files.

On Fri, 25 Aug 2006 00:01:06 -0700 (PDT)
David Miller [off-list ref] wrote:

From: Andrew Morton <redacted>
Date: Thu, 24 Aug 2006 23:20:24 -0700

quoted

On Fri, 25 Aug 2006 09:48:15 +0400
Evgeniy Polyakov [off-list ref] wrote:

quoted

kmalloc is really slow actually - it always shows somewhere on top 
in profiles and brings noticeble overhead

It shouldn't.  Please describe the workload and send the profiles.

Not that I can account for the problem in this specific case, in my
experience cutting down kmalloc() calls matters a _lot_ performance
wise.

For example, this is why we allocate TCP sockets as one huge blob
instead of 3 seperate allocations (generic socket, IP socket, TCP
socket).

In fact, one of the remaining performance issues in IPSEC rule
creation is that we allocate seperately hunks of memory for the rule's
encryption state, the optional hash algorithm state, etc.

Part of that will be cache sharing between the three structs though.