Date: Fri, 12 Feb 2016 07:27:34 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-amd64@FreeBSD.org Subject: [Bug 207068] hwpmc wrap around/sign extension Message-ID: <bug-207068-6-IYA6iGPqdZ@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-207068-6@https.bugs.freebsd.org/bugzilla/> References: <bug-207068-6@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=3D207068 --- Comment #11 from commit-hook@freebsd.org --- A commit references this bug: Author: kib Date: Fri Feb 12 07:27:24 UTC 2016 New revision: 295560 URL: https://svnweb.freebsd.org/changeset/base/295560 Log: If full width writes to the performance monitoring counters are supported, use full-width aliases MSRs for writes. This fixes the "[pmc,X] negative increment" assertion on the context switch when clipped counter value is sign-extended. Add definitions for the MSR IA32_PERF_CAPABILITIES needed to detect the feature. PR: 207068 Submitted by: joss.upton@yahoo.com MFC after: 2 weeks Changes: head/sys/dev/hwpmc/hwpmc_core.c head/sys/dev/hwpmc/hwpmc_core.h --=20 You are receiving this mail because: You are on the CC list for the bug.=
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?bug-207068-6-IYA6iGPqdZ>