Date: Sun, 22 Mar 1998 10:20:49 +0200 (SAT) From: John Hay <jhay@mikom.csir.co.za> To: peter@netplex.com.au (Peter Wemm) Cc: smp@FreeBSD.ORG Subject: Re: is it just me, or... Message-ID: <199803220820.KAA17845@zibbi.mikom.csir.co.za> In-Reply-To: <199803220756.PAA10655@spinner.netplex.com.au> from Peter Wemm at "Mar 22, 98 03:56:35 pm"
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> > > > It is just me or has the smp kernel taken a nose dive over the last month > > > > > or so? > > > ... > > I do most of my testing, verification and day-to-day usage with SMP systems. > > It is only an after-thought that I check out UP systems. If there is anythin > g > > that you can point to where performance has decreased, let me know. > ... > Anyway, I got a couple of replies saying that they were having no trouble > at all. One even fired up a rc564/rc5des key searcher (since that was one > of the easiest ways I could provoke problems), but nothing unexpected > happened. > > So, it must be something I'm doing. Is *anybody* running parallel rc564 or > rc5des under SMP? (the rc5 cores are (apparently) not reentrant, so you > need two or more copies running at once to get max throughput, even in the > multithread version) I'm normally running two rc564s on my Dual PII-266 and also do two simultaneous "make release"es (offset with an hour so that cvs don't grind the disks almost to a halt and also so that the /dev/vn0s don't clash) every night with no problems. The machine has an onboard 2940UW with two disks attached. > > The only other things I could think of: > - the machine having trouble is a pure-ELF system, even though the rc5 > key search problems are from a.out executables. > - I had VM86 enabled (being compiled out now) > - I had USER_LDT enabled (going too) > - I had a sound driver enabled (going too). > - I have AHC_TAGENABLE, AHC_SCBPAGING_ENABLE and AHC_ALLOW_MEMIO (works > fine under UP). > I have the AHC_* defines in, but not VM86 or USER_LDT. John -- John Hay -- John.Hay@mikom.csir.co.za To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message
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