WebThis patch adds rdmsr_safe_on_cpu_resched() which does not spin. I use this function from msr_read() but future patches might convert other callers to use this variant as well. … Web"CPU Core May Machine Check When System Software Changes Page Tables Dynamically" - worked around by setting bit 47. 15h Errata 674 "Processor May Cache Prefetched Data from Remapped Memory Region" - worked around by setting bit 13. C001_1023: K8 Errata 69 "Multiprocessor Coherency Problem with Hardware Prefetch Mechanism" - worked around …
Why are the results of rdmsr not consistency - Intel Communities
WebThis may happen when Linux is running under KVM and we are passing-through host F/M/S data, for example. Use rdmsrl_safe to first access the RAPL_POWER_UNIT MSR; if this fails, do not attempt to use this PMU. WebLKML Archive on lore.kernel.org help / color / mirror / Atom feed * [PATCH] perf/x86/intel: Use rdmsrl_safe when initializing RAPL PMU. @ 2014-03-13 19:36 Venkatesh Srinivas … small mens batman costume
msr.h source code [linux/arch/x86/include/asm/msr.h]
WebOn Fri, Jun 01, 2012 at 04:52:36PM +0200, Borislav Petkov wrote: > From: Borislav Petkov > There's no real reason why, when showing the MSRs on a CPU at boottime, > we should be using the AMD-specific variant. Simply use the generic safe > one which handles #GPs just fine. Acked-by: Konrad Rzeszutek Wilk … WebAug 4, 2015 · perf/x86: Add an MSR PMU driver. This patch adds an MSR PMU to support free running MSR counters. Such. as time and freq related counters includes TSC, IA32_APERF, IA32_MPERF. and IA32_PPERF, but also SMI_COUNT. The events are exposed in sysfs for use by perf stat and other tools. WebHere is a simple scenario to reproduce the issue: 1. Boot up the system 2. Get MSR 0x19a, it should be 0 3. Put the system into sleep, then wake it up 4. Get MSR 0x19a, it shows 0x10, while it should be 0 Although some BIOSen want to change the CPU Duty Cycle during S3, in our case we don't want the BIOS to do any modification. highley kitchens normanton