On Nov 25, 2007 12:05 PM, Christopher Chen <[EMAIL PROTECTED]> wrote: > On Nov 25, 2007 3:13 AM, Robert Watson <[EMAIL PROTECTED]> wrote: > > At this point, Giant is gradually becoming a lock around the tty, newbus, > > usb, > > and msdosfs code, and we're largely at diminishing returns in terms of > > making > > improvements in parallelism through removing Giant. In FreeBSD 7, the focus > > was on improving parallelism rather than removing Giant, with improvements > > in > > locking primitives, the scheduler, and lock granularity. For example, most > > of > > the improvement in MySQL performance in FreeBSD 7 can be put down to a small > > number of changes: > > > > - Conversion to 1:1 threads from M:N threads. > > Dear Robert: > > I enjoyed reading your overview of changes from FreeBSD 6 to 7 with > regards to MP scalability, but I am a bit confused over this > point--Doesn't the user still have the choice between libthread, which > is M:N, and libthr, which is 1:1? > > At some point during the 6.x days, it was considered advantageous to > use libthr when running MySQL. Has the project decided to go with > libthread after all? > > Perhaps we're talking about entirely different things.
My apologies. I re-read your statement and it makes sense now. I thought you were saying we were converting from 1:1 to M:N. Sorry for any confusion! -- Chris Chen <[EMAIL PROTECTED]> "I want the kind of six pack you can't drink." -- Micah _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
