This controls timer frequency in Linux ? I've played with generic timer frequency in freebsd decreasing the frequency from 100MHz (default) to 10MHz - it gives some speed up but not too much.
Ruslan On Tue, Apr 14, 2015 at 11:00:50PM -0700, Ali Saidi wrote: > For linux we pass in a jiffies= on the command line so Linux doesn¹t > attempt to calculate it on boot. Perhaps FreeBSD is doing some type of > calibration like jiffies and that is taking the time? > > Thanks, > Ali > > > On 4/14/15, 2:35 AM, "Ruslan Bukin" <[email protected]> wrote: > > >Hello, > > > >I experience a speed problem running FreeBSD/ARMv8 in FS mode: > >for some reason gem5 takes ~1 hour to boot FreeBSD multiuser, > >while Linux on a same host PC (using same gem5.opt binary) > >takes about 7-10 minutes. > > > >I tested FreeBSD boot with rootfs on ATA (PCI bus) disk device as well > >with Virtio Block (also PCI bus). > > > >If I set --debug-start option to some N ticks value (i.e. 10000000000), > >I see that Linux reaches it in 10 seconds, while FreeBSD is about > >80 seconds. > > > >Any idea what I'm missing? May be Linux tunes some CPU clocks during > >boot ? > > > >Ruslan > > > >_______________________________________________ > >gem5-users mailing list > >[email protected] > >http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users > > > -- IMPORTANT NOTICE: The contents of this email and any attachments are > confidential and may also be privileged. If you are not the intended > recipient, please notify the sender immediately and do not disclose the > contents to any other person, use it for any purpose, or store or copy the > information in any medium. Thank you. > > ARM Limited, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, > Registered in England & Wales, Company No: 2557590 > ARM Holdings plc, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, > Registered in England & Wales, Company No: 2548782 > > _______________________________________________ > gem5-users mailing list > [email protected] > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users _______________________________________________ gem5-users mailing list [email protected] http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
