Path: csiph.com!eternal-september.org!feeder.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Don Kuenz Newsgroups: sci.electronics.design Subject: Re: LTspice Loafing? Date: Sat, 11 Mar 2017 01:01:44 -0000 (UTC) Organization: A noiseless patient Spider Lines: 23 Distribution: world Message-ID: <20170310c@crcomp.net> References: <01e668db-561d-3da3-558f-9e9ff102b1a0@electrooptical.net> <7dff20d1-d60d-4049-a2d4-97760dfd1ffd@googlegroups.com> Injection-Date: Sat, 11 Mar 2017 01:01:44 -0000 (UTC) Injection-Info: mx02.eternal-september.org; posting-host="36537e8b816218f2c30b7700334a4a2a"; logging-data="14231"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19Bm6/9gJ/aB6eI51u0D0AG" Cancel-Lock: sha1:c3jyufo/vi8ztjhogpiCvWzcAyM= Xref: csiph.com sci.electronics.design:451244 makolber@yahoo.com wrote: > >> >> I was running some simulations on LTspice and it is not even using >> >> 5% of my CPU. Nothing else is topping it and the entire computer >> >> is pretty much at idle. What could be limiting the speed? > > Make sure the hard drives are running in DMA mode not PIO mode. > > They automatically and permanently fall back to PIO mode if there > are hardware errors. Now that's some mighty fine information to know. FWIW Larkin's simulation takes ~ 80s when run from a Remote Desktop session and a mapped Samba share on my ancient 32-bit Pentium 4, 4 GB, W2003 server with LTSpice v4.20. "If it ain't broke don't fix it." Thank you, -- Don Kuenz KB7RPU