Machine Check Error Vmware
Contents |
machine →
Pf Exception 14 In World
Tweet How to decode machine check exceptions (MCE)
Machine Check Exception Error
in VMware products Posted on January 15, 2010 by VMware Does mcelog the acronym PSOD send chills down your spine? Here's a video which provides some understanding as to what a https://kb.vmware.com/kb/1005184 purple diagnostics screen (PSOD) means, and what it can tell you. What is a Machine-Check Exception (MCE)? Understanding the machine-check architecture Decoding the machine-check exception Other considerations For more information and context, continue reading the KB article: http://blogs.vmware.com/kb/2010/01/how-to-decode-machine-check-exceptions-mce-in-vmware-products.html Decoding Machine Check Exception (MCE) output after a purple screen error. This entry was posted in KBTV on January 15, 2010 by VMware. Search / Translate Subscribe & Follow Subscribe Subscribe to Special Alerts @VMwareCares Tweets by @VMwareCares Resources Knowledge Base KB Digest VMware KBTV Whitepapers Technical Papers Documentation Categories Alerts Announcements Cloud Consumer Desktop Datacenter Education Enterprise Desktop From the Trenches Hidden Gems Highlights How-to Inside Scoop KBTV KBTV Webinars Knowledge Base Licensing Live Management My VMware NSX Patches Resolution Paths Support Outsider Tech Talk Technology Preview Top 20 Uncategorized Videos VMworld White board Social Media Directories VMware Twitter Accounts VMware LinkedIn Channels VMware Facebook Pages VMware Google+ Pages VMware YouTube Channels
while under a certain CPU or Memory intensive load - or even at random. Most of the times without throwing a Purple Screen of Death so you can at least have a notion https://vmxp.wordpress.com/2014/10/27/debugging-machine-check-errors-mces/comment-page-1/ about what went wrong. There is a VMware KB Article 1005184 concerning this issue, and it https://en.wikipedia.org/wiki/Machine-check_exception has been updated significantly since I have started to take interest in these errors. UPDATE: I have published a new CPU Stress Test & Machine Check Error debugging article - check it out if you'd like to learn more. If you are "lucky", you can see and decode yourself what preceded the crash. This is because both AMD machine check and Intel CPUs have implemented something by the name of Memory Check Architecture. This architecture enables the CPUs to intelligently determine a fault that happens anywhere on the data transfer path during processor operation. This can capture Memory operation errors, CPU Bus interconnect errors, cache errors, and much more. How to determine what has been causing your system to fail? Read on. You will need to browse to Intel's website hosting machine check exception the Intel® 64 and IA-32 Architectures Software Developer Manuals. There, download a manual named "Intel 64 and IA-32 Architectures Software Developer's Manual Combined Volumes 3A, 3B, and 3C: System Programming Guide". I highly recommend printing it, because you will be doing some back-and-forth seeking. Now, to get list of possible Machine Check Errors captured by the VMkernel, run the following in your SSH session with superuser privileges: cd /var/log;grep MCE vmkernel.log this will output something similar to this: Most of the times, the VMkernel decodes these messages for you - on this image you see that there are plenty of Memory Controller Read Errors. You can see more closely where the problem originates from: CMCI: This stands for Corrected Machine Check Interrupt - an error was captured but it was corrected and the VMkernel can keep on running. If this were to be an uncorrectalbe error, the ESXi host would crash. Logical CPU number where the MCE was detected: This particular host had Dual 8-Core Intel Xeon Processors with HyperThreading enabled. For all other occurrences of this MCE, the cpu# was alternating between 0-15 this means the fault was always detected on the first cpu. Memory Controller Read/Write/Scrubbing error on Channel x: Means that the error was captured on a certain channel of the physica
may be challenged and removed. (June 2011) (Learn how and when to remove this template message) A Machine Check Exception (MCE) is a type of computer hardware error that occurs when a computer's central processing unit detects a hardware problem. Modern versions of Microsoft Windows handle machine check exceptions through the Windows Hardware Error Architecture. When WHEA detects a machine check exception, it displays the error in a Blue Screen of Death, with the following parameters (which vary, but the first parameter is always 0x0 for a machine check exception):[1] *** STOP: 0x00000124 (0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000000000) On Linux, a process (such as klogd[2]) writes a message to the kernel log and/or the console screen (usually only to the console when the error is non-recoverable and the machine crashes as a result): CPU 0: Machine Check Exception: 0000000000000004 Bank 2: f200200000000863 Kernel panic: CPU context corrupt The error usually occurs due to failure or overstressing of hardware components where the error cannot be more specifically identified with a different error message.[clarification needed] Diagnosing the error message can be difficult, although Intel Pentium processors do generate more specific codes which can be decoded by contacting the manufacturer.[citation needed] Most MCEs require a restart of the system before users can continue normal operation, and indicate a long-term problem of a general nature.[citation needed] Contents 1 Problem types 2 Possible causes 3 Decoding MCEs 3.1 Programs to Decode MCEs 4 See also 5 References 6 External links Problem types[edit] Most of these errors relate specifically to the Pentium processor family. Similar errors may occur on other processors and will cause similar problems. Some of the main hardware problems that cause MCEs include: System bus errors: (error communicating between the processor and the motherboard). Memory errors: parity checking detects when a memory error has oc