Date: Sun, 19 May 1996 20:19:08 +1000 From: Mark Hannon <mark@seeware.DIALix.oz.au> To: freebsd-hackers@freebsd.org Subject: How to interpret lmbench? Message-ID: <199605191019.UAA00247@putte.seeware.DIALix.oz.au>
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Hi, I have just run some lmbench tests on my 2.1.0-STABLE system and am having some trouble understanding the results. Hippo15 motherboard, AMD4-120MHz CPU, running at 40MHz, 24MB RAM, 128K Cache. I have experimented with setting the DRAM WS at both 2 & 1 (read & write) and also 1 & 1. The results for memory latencies are tabulated below. Host OS Mhz L1 $ L2 $ Main mem TLB Guesses putte.see FreeBSD 2.1-S 118 10 480 483 872 No L2 cache? putte.see FreeBSD 2.1-S 118 10 343 345 635 No L2 cache? What do these numbers mean?? Are they telling me the L2 cache doesn't work?? Looking at the graphs I can only see a couple of distinct levels, what sort of L2 & MB times should I be seeing? Regards/mark -- +-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-+ | Mark Hannon,| FreeBSD - Free Unix for your PC| mark@seeware.DIALix.oz.au| | Melbourne, | PGP key available by fingering | epamha@epa.ericsson.se | | Australia | seeware@melbourne.DIALix.oz.au | | +-=-=-=-=-=-=-+-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-+
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