Hi Eric! On Mon, Jun 19, 2017 at 08:47:47AM +0200, Eric Botcazou wrote: > The Solaris maintainer ported Cilk++ (https://en.wikipedia.org/wiki/Cilk) to > the SPARC architecture for GCC 7 and later, which explains why the issue > doesn't show up with GCC 6. Cilk++ is a multithreading layer on top of C and > C++ and its testsuite does a lot of thread manipulation. > > Note that, even when the machine doesn't freeze, the Cilk++ testsuite reports > several timeouts (there are no such timeouts on Solaris): > https://gcc.gnu.org/ml/gcc-testresults/2017-06/msg00462.html Thanks for the explanation. We're now just disabling cilk on Debian for gcc-7 and gcc-snapshot for the time being. > This is probably the most promising angle of attack: someone should look into > the timeouts by running the Cilk++ testsuite with low/no parallelism and find > out where they come from (compiler, Cilk++ runtime or system/kernel). I can > do it, but I'm essentially a compiler guy and I don't have much expertise in > multithreading at the system/kernel level. Ok, I hope that will help the kernel guys to figure out what the problem is. Adrian -- .''`. John Paul Adrian Glaubitz : :' : Debian Developer - glaubitz@xxxxxxxxxx `. `' Freie Universitaet Berlin - glaubitz@xxxxxxxxxxxxxxxxxxx `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913 -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
