Re: Off topic ? mmap timings

2000-02-10 Thread Ferenc Tamas Gyurcsan
Alright, so I investigated this question a little bit more: Test: 102,400,000 Megabytes to IDE disk, with Pentium 166 or something like that. So the timings with mmap: Write: ~28 sec Reading: ~20 sec With read/write, the speed-up stronlgly depends on how many bytes you write to the disk at

Re: Off topic ? mmap timings

2000-02-10 Thread Marc Evans
On Thu, 10 Feb 2000, Ferenc Tamas Gyurcsan wrote: experiment with this. It was interesting, but now let's speed-up the X:-). Look at version 3.9.17* of XFree86 for speedups - Marc ** To unsubscribe from this list, send mail to

Re: Off topic ? mmap timings

2000-02-10 Thread Marc Evans
Have you looked at the Xv extension? - Marc On Thu, 10 Feb 2000, Ferenc Tamas Gyurcsan wrote: Hi, Look at version 3.9.17* of XFree86 for speedups The important stuff is how I draw on X actually. I'm using Qt, and now I'm gonna implement an MIT-SHM X drawing thing. This seems to be the

Re: Off topic ? mmap timings

2000-02-10 Thread Bob Bell
Ferenc Tamas Gyurcsan wrote: Test: 102,400,000 Megabytes to IDE disk, with Pentium 166 or something like that. Wow, if I was manipulating nearly 100 terabytes of data I would opt for some sort of SCSI RAID setup instead of IDE... :-) -- Bob BellCompaq Computer Corporation

Re: Off topic ? mmap timings

2000-02-09 Thread Ferenc Tamas Gyurcsan
Hi, Please excuse a "not necessarily linux" question, but who wants to share opinions/experience on the virtues of mmap ing a file as opposed to opening it ? I'm about to start work on a project where the local custom is to mmap input files and I'm not so sure that's a good idea (the files and