[Bug 268897] panic: [pmc,4811] Retrieving callchain for thread that doesn't want it
Date: Fri, 13 Jan 2023 17:57:50 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=268897 --- Comment #2 from John F. Carr <firstname.lastname@example.org> --- I ran the same command again and the system crashed immediately. The program only runs for a second or a few seconds. It did not crash when I did not use pmcstat's "-U" option. The program "run" starts 48 long-lived threads on this 24x2 system. Most of the threads are spending a lot of time in a loop trying to acquire a spinlock. This is the issue that drove me to try performance tools. I will try to assemble a reproducing program within the attachment size limit. -- You are receiving this mail because: You are the assignee for the bug.