Date: Mon, 02 Mar 2015 01:49:45 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 198149] [hwpmc] pmcstat -P -t (top mode, process sampling) stops after a while Message-ID: <bug-198149-8@https.bugs.freebsd.org/bugzilla/>
next in thread | raw e-mail | index | archive | help
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=198149 Bug ID: 198149 Summary: [hwpmc] pmcstat -P -t (top mode, process sampling) stops after a while Product: Base System Version: 11.0-CURRENT Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: adrian@freebsd.org Hi, Using pmcstat in top mode with system level sampling works fine, but process level sampling stops reporting events after a while. A while is typically a couple of seconds if you're lucky. This is reproducable on -10 and -HEAD. To reproduce: * run something that's very busy - say, nginx with multiple worker processes * run pmcstat -P CPU_CLK_UNHALTED_CORE -T -w 1 -t <nginx pid> * wait until it stops providing events. -- 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-198149-8>