On Saturday 12 February 2005 00:31, Vincent Guffens wrote: > hi everyone, > > I read on the UML kernel site that SMP might be broken, so I gave it a > try with linux-2.4.24-um1 to see how it would look like. I only try it > with tt mode. > > In fact, the only modification that has to be done to get it to compile > is simply to add CONFIG_NR_CPUS in the config.in file (The very simple > patch is below). > > And that was it, now I have a brand new 16 cpus machine, as shown below > (with four processes running) > > 3:36pm up 4 min, 4 users, load average: 0.04, 0.02, 0.00 > 37 processes: 33 sleeping, 4 running, 0 zombie, 0 stopped > CPU0 states: 14.3% user, 7.3% system, 0.0% nice, 77.2% idle > CPU1 states: 15.3% user, 7.2% system, 0.0% nice, 76.3% idle > CPU2 states: 0.1% user, 0.1% system, 0.0% nice, 99.3% idle > CPU3 states: 18.1% user, 8.1% system, 0.0% nice, 73.1% idle > CPU4 states: 0.0% user, 0.0% system, 0.0% nice, 100.0% idle > CPU5 states: 0.0% user, 0.0% system, 0.0% nice, 100.0% idle > CPU6 states: 0.0% user, 0.0% system, 0.0% nice, 100.0% idle > CPU7 states: 0.0% user, 0.0% system, 0.0% nice, 100.0% idle > CPU8 states: 0.0% user, 0.0% system, 0.0% nice, 100.0% idle > CPU9 states: 0.0% user, 0.0% system, 0.0% nice, 100.0% idle > CPU10 states: 0.0% user, 0.0% system, 0.0% nice, 100.0% idle > CPU11 states: 0.0% user, 0.0% system, 0.0% nice, 100.0% idle > CPU12 states: 0.0% user, 0.0% system, 0.0% nice, 100.0% idle > CPU13 states: 0.0% user, 0.0% system, 0.0% nice, 100.0% idle > CPU14 states: 0.0% user, 0.0% system, 0.0% nice, 100.0% idle > CPU15 states: 0.0% user, 0.0% system, 0.0% nice, 100.0% idle > Mem: 28936K av, 28340K used, 596K free, 0K shrd, 32K > buff > Swap: 0K av, 0K used, 0K free 22580K > cached > > PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME COMMAND > 156 root 14 0 376 376 316 R 14.4 1.2 0:01 md5sum > 155 root 11 0 376 376 316 R 12.6 1.2 0:01 md5sum > 154 root 13 0 376 376 316 R 12.2 1.2 0:01 md5sum > 153 root 10 0 920 920 728 R 0.1 3.1 0:00 top > > > > I also tried with 32 processors, rebooted many times and let it run a > few hours. I had it hang and panic a few times but I think it was > because a make clean must be done before recompiling with SMP enable. > > Also, all the interrupts seem to be handled by CPU0 (according to > /proc/interrupt), even after changing the prof_cpu_mask in /proc. > > Is there something to do to make other processors handle interrupt ? I don't know, but I read in the "25 Jul 2002" entry of http://user-mode-linux.sourceforge.net/diary.html that Jeff wanted to do what you see on purpose.
-- Paolo Giarrusso, aka Blaisorblade Linux registered user n. 292729 http://www.user-mode-linux.org/~blaisorblade ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
