From owner-freebsd-arch  Mon Feb 18 13: 0:34 2002
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From: Andrew Gallatin <gallatin@cs.duke.edu>
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Date: Mon, 18 Feb 2002 15:59:57 -0500 (EST)
To: Matthew Dillon <dillon@apollo.backplane.com>
Cc: Poul-Henning Kamp <phk@critter.freebsd.dk>, arch@FreeBSD.ORG,
	jhb@FreeBSD.ORG, peter@wemm.org, jake@locore.ca
Subject: Re: timing results for gettimeofday() (without any credential fixes)
In-Reply-To: <200202162115.g1GLFSe32349@apollo.backplane.com>
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Matthew Dillon writes:
 > CURRENT 2xCPU SMP BUILD Original gettimeofday() code
 > 
 >     one TG running:	350000/sec
 >     two TGs running:	55000/sec per TG	(no, that isn't a type-o)
 >
<..> 
 > STABLE 2xCPU SMP BUILD (note gettimeofday() on stable is marked MPSAFE):
 >     one TG running:	192402/sec
 >     two TGs running:	95900/sec
 > 

To add 2 datapoints to that:

CURRENT 1CPU UP BUILD top-of-tree as of noon EST, no patches, no WITNESS, INVARIANTS:
	one TG running: 145000/sec

-STABLE 1CPU UP BUILD, no patches
	one TG running: 625000/sec

So that's a factor of 4 slowdown for syscalls between -current and
-stable on UP alphas...


Drew

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