Scott Long wrote this message on Sun, Oct 30, 2005 at 07:30 -0700: > >Correct, but why is it felt the latency of the ACPI timer is an issue? > >Of course we all want things to as fast as possible, but is that just an > >abstract desire, or a real issue was run into? > > > > ACPI-fast requires an ioport read which takes about 1us (according to > Google). Do that 1000 times a second and you have each CPU spending > 1% of its time doing nothing but reading the clock. Yikes. Math correction: .1%... 1us * 1000 = 1ms, 1ms = .001s, .001 * 100% = .1% -- John-Mark Gurney Voice: +1 415 225 5579 "All that I will do, has been done, All that I have, has not."Received on Sun Oct 30 2005 - 18:59:46 UTC
This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:38:46 UTC