On 01/04/2013 01:37 PM, Jasmin Blanchette wrote:
Hi Makarius,Change cb5cdbb645cd ("clarified bootstrapping of Pure") altered the semantics of Multithreading.max_threads_value () with Poly/ML. Namely, all of a sudden the function returns 1 instead of 4 on a 4-CPU machine, which seems strage as a default for a function called "max_threads_value". As a result, Sledgehammer launches only one local thread -- see "avoid_too_many_threads" and its use in "src/HOL/Tools/Sledgehammer/sledgehammer_isar.ML". SPASS is then no longer run at all. This has been like this for some time now. I failed to notice the issue because I had overwritten the number of threads via a Proof General setting. This really needs to be fixed before the release -- either in "multithreading_polyml.ML" or in "sledgehammer_isar.ML".
Hi Markus, I am not sure if this is related to the above bug, but I am currently getting an exception Thread "Thread creation failed" after some time when compiling HOL with PolyML 5.5.0 on a machine with quite a few CPUs (I am using Isabelle repository version 30bcdd5c8e78). I have the impression that Isabelle just tries to create as many threads as there are CPUs, which exceeds the maximum number of threads allowed by the operating system for a single process. To avoid this problem, I tried to limit the number of threads by adding ISABELLE_BUILD_OPTIONS="threads=n" to my .isabelle/etc/settings file (for a suitable value of n), but that didn't seem to have any effect. Any ideas? Greetings, Stefan _______________________________________________ isabelle-dev mailing list [email protected] https://mailmanbroy.informatik.tu-muenchen.de/mailman/listinfo/isabelle-dev
