Date: Thu, 20 Jul 2017 01:04:20 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 219399] System panics after several hours of 14-threads-compilation orgies using poudriere on AMD Ryzen... Message-ID: <bug-219399-8-87y8vXCKwe@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-219399-8@https.bugs.freebsd.org/bugzilla/> References: <bug-219399-8@https.bugs.freebsd.org/bugzilla/>
next in thread | previous in thread | raw e-mail | index | archive | help
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D219399 --- Comment #71 from Don Lewis <truckman@FreeBSD.org> --- (In reply to Nils Beyer from comment #67) The Linux version of the test pins the entire process to a single randomly-chosen CPU. The following diff should make it work the same on FreeBSD: --- ryzen_segv_test.c.orig 2017-07-19 17:26:47.686991000 -0700 +++ ryzen_segv_test.c 2017-07-19 17:35:56.406073000 -0700 @@ -69,6 +69,7 @@ #include <sys/mman.h> #include <sched.h> #include <sys/types.h> +#include <sys/cpuset.h> #include <unistd.h> #endif @@ -332,7 +333,7 @@ pthread_t t1, t2, t3; #ifdef _MSC_VER #else - cpu_set_t cpuset; + cpuset_t cpuset; int cpu; #endif pid_t pid =3D getpid(); @@ -365,7 +366,7 @@ cpu =3D random() % n_cpus; CPU_ZERO(&cpuset); CPU_SET(cpu, &cpuset); - sched_setaffinity(pid, sizeof(cpu_set_t), &cpuset); + cpuset_setaffinity(CPU_LEVEL_WHICH, CPU_WHICH_PID, pid, sizeof(cpuset_t), &cpuset); fprintf(stderr, "PID:%d CPU:%d\n", (int)pid, cpu); #endif With that change, I don't see any problems on my machine. That seems to be= an unfairly easy test, though. If I nuke the same code that you did, I still don't see any failures, though the runtime of each iteration seems to vary a lot. With loops set to 10000= 000, the process may run anywhere from a few seconds to close to a minute: 12.804u 0.007s 0:04.27 299.7% 10+167k 2+0io 0pf+0w 23.431u 0.000s 0:07.81 300.0% 10+167k 2+0io 0pf+0w 9.789u 0.000s 0:03.26 300.0% 10+167k 2+0io 0pf+0w 9.656u 0.007s 0:03.22 299.6% 10+167k 2+0io 0pf+0w 9.596u 0.000s 0:03.20 299.6% 10+167k 2+0io 0pf+0w 12.041u 0.000s 0:04.01 300.2% 10+167k 2+0io 0pf+0w 22.294u 0.007s 0:07.43 300.0% 10+167k 2+0io 0pf+0w 13.290u 0.000s 0:04.43 300.0% 10+167k 2+0io 0pf+0w 10.939u 0.007s 0:03.65 299.4% 10+167k 2+0io 0pf+0w 12.953u 0.000s 0:04.31 300.4% 10+167k 2+0io 0pf+0w 11.994u 0.000s 0:04.00 299.7% 10+167k 2+0io 0pf+0w 13.084u 0.000s 0:04.36 300.0% 10+167k 2+0io 0pf+0w 125.599u 0.007s 0:41.87 299.9% 10+167k 2+0io 0pf+0w --=20 You are receiving this mail because: You are the assignee for the bug.=
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?bug-219399-8-87y8vXCKwe>