Deadlocks with recent SMP current

Sławek Żak zaks at
Wed Aug 18 02:07:42 PDT 2004

Julian Elischer <julian at> writes:

> Sławek Żak wrote:


>>     MySQLd is running with libpthread and can go up to 400% without
>>     significantly afecting the idle percentage shown by top. I don't see how I
>>     could fit 400% into 20% on those two suckers, therefore I ask :)
> Cpu percentage use is broken for pthread applications..
> it's almost impossible to work out the right way of doing it
> due to the nature of M:N threading where there is no fixed rule as
> to which user thread is run by which kernel thread.
> I have ideas but it will probably have to be an aggreagate cpu% for the thread
> group, divided by the number of kernel threads in the group.

    Well. Better this than the current sorry, saying nothing number :)

Sławek Żak : UNIX Systems Administrator : PTC Sp. zoo

More information about the freebsd-current mailing list