X-Authentication-Warning: delorie.com: mail set sender to djgpp-bounces using -f Message-ID: <41c73a4d$0$176$cc7c7865@news.luth.se> From: Martin Str|mberg Subject: Re: DMA and PIO (was Re: Problems with timer interrupt chaining and SmartDrv) Newsgroups: comp.os.msdos.djgpp References: <01c4e368$Blat.v2.2.2$592f6a00 AT zahav DOT net DOT il> <41c5fcca DOT sandmann AT clio DOT rice DOT edu> <01c4e6ce$Blat.v2.2.2$be0d2340 AT zahav DOT net DOT il> User-Agent: tin/1.4.6-20020816 ("Aerials") (UNIX) (NetBSD/1.6Q (alpha)) Date: 20 Dec 2004 20:47:09 GMT Lines: 14 NNTP-Posting-Host: speedy.ludd.ltu.se X-Trace: 1103575629 news.luth.se 176 130.240.16.13 To: djgpp AT delorie DOT com DJ-Gateway: from newsgroup comp.os.msdos.djgpp Reply-To: djgpp AT delorie DOT com Eli Zaretskii wrote: >> From: Charles Sandmann >> Try this test. Open task manager so you can monitor CPU usage. Using the >> default DMA, read a 500MB file from disk. Using a modern disk this should >> take less than 10 seconds and use no more than 2-3 percent of the CPU. > What program does one use to read a file, but otherwise do nothing? "cat file >/dev/null"? Right, MartinS