On Saturday, 04.07.2015 at 16:06, Antti Kantee wrote: > On 04/07/15 15:47, Martin Lucina wrote: > >Interesting. Perhaps your QEMU is showing even more overhead for PIT > >interrupt delivery than mine? > > So you can't repeat the problem? Interesting. > > pooka@watou:~$ qemu-system-x86_64 --version > QEMU emulator version 2.1.0 (Debian 2.1+dfsg-4ubuntu6.7), Copyright > (c) 2003-2008 Fabrice Bellard
Ah, x86-64. I hadn't really tested that, still used to bmk not working on that. > >Can you run the test program below with, say, '10 500', '10 1000' and '10 > >5000' as parameters and report the output? Also, if possible, run it in > >both POSIX mode and BMK mode (built with -DBMK, you'll need to comment out > >the "die" if the stub link fails in -gcc). > > Not sure if evident from the data: that program also runs slow over > the wall clock in both modes. (not sure if expected or not) No, it should match up with the wall clock. Anyway, reproduced here, I'll look into it. Thanks for running the tests!
