On Mon, Jun 23, 2014 at 3:52 PM, Antti Kantee <[email protected]> wrote: > Hi, > > I added the first attempt at pthread support in rump kernel applications > to rumprun by implementing the NetBSD _lwp_foo() interfaces using host > swapcontext() for switching between threads. The implementation > connects the interfaces to some sort of scheduler-like thing running on > the platform, and hence libpthread can block and wakeup threads. We're > actually more interested in getting pthreads running on rumpuser-xen, > but as usual, it was easier to test things out in the comfort of userspace. > > The only limitation I can think of is that the _lwp_foo() interfaces > must be implemented by the same scheduling facility as the rump kernel > hypercalls. Otherwise you'll run into the old userspace thread library > problem where making a blocking system call blocked all threads. This > shouldn't be a problem even for userspace now, with Justin's nicely > timed release of the rumpfiber hypercall implementation (we didn't plan > it that way).
Excellent, thats very useful. There is some stuff I want to try with threads in userspace too. Justin ------------------------------------------------------------------------------ HPCC Systems Open Source Big Data Platform from LexisNexis Risk Solutions Find What Matters Most in Your Big Data with HPCC Systems Open Source. Fast. Scalable. Simple. Ideal for Dirty Data. Leverages Graph Analysis for Fast Processing & Easy Data Exploration http://p.sf.net/sfu/hpccsystems _______________________________________________ rumpkernel-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/rumpkernel-users
