Date: Tue, 23 Jun 1998 22:12:34 +0100 From: Seth Leigh <seth@pengar.com> To: Tom Jackson <toj@gorillanet.gorilla.net>, freebsd-smp@FreeBSD.ORG Subject: Re: Running RC5 Message-ID: <l0311070bb1b5c87be46e@[192.168.0.2]> In-Reply-To: <19980623214148.00185@TOJ.org>
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>Hi all, > >Is anyone successfully running this client normally. ie. >running just *one* instance of the client and numcpu=2 >and achieve about 2X the normal crack rate. To my understanding, this can't currently be done in FreeBSD, because there is currently no type of threading that has support from the kernel for multiple threads. Without this support, the threads can't be scheduled to different processors (or be scheduled preemptively, or only block the calling thread for blocking io and other calls, etc.). I currently run two independent rc5 clients on my dual PPro 200, and each of these clients does about 526 kKeys/sec, for a total of 1052 kKeys/sec combined. Not bad at all. This is with X running, with a whole bunch of other processes (different xterms, top, etc), most of which aren't using up any significant cpu time. The absolute fastest speed I have seen on this machine was 537 kKeys/s per processor, without X, and with nothing else running. I don't have anything against running two rc5 clients. If I didn't have to I wouldn't, but it is not a problem to do it. I also run the rc5 client in an xterm rlogined into my other FreeBSD machine, which uses a Cyrix P166+ cpu. That machine does around 309 kKeys/sec. Between these two machines I get something like 450 blocks a day. Plus I have several machines at work running rc5, so I do about 1200-1500 blocks per day total. Anyways, if you absolutely have to have kernel supported threads on your machine, you'll have to go with Linux for the time being. Their LinuxThreads implementation uses one process per thread, so their threads are independently schedulable. Seth > >Mine appears to crack at about 1/2 rate. A single PII-266 >cracks at about 745 kkeys/s. Mine completes a block at >377 kkeys/s. Anybody have any thoughts on this? > >Tom > >To Unsubscribe: send mail to majordomo@FreeBSD.org >with "unsubscribe freebsd-smp" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message
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