Using Trace Information - Technical users will be able to diagnose problems using trace data that previously would have required detailed understanding of MemTest86's internal workings. Please email failure information using the form below. Again, email at least the last 5 trace points or better a picture of the screen. Then run the test again and stop at the trace point just before the crash and report the information. This requires slowly stepping through the traces and identifying the point where the test crashes or reboots. For cases where the test crashes we need to find the trace points just before the crash. More useful would be a digital picture of the screen. At minimum email the last 5 trace points. Just continue to press return until the test stops. Gathering traces for a situation when the test hangs is very simple. Gathering Trace Information – There are two types of failures where trace information is needed to help diagnose the problem, hangs and crashes.
As initialization proceeds other portions of the screen will be filled in with information and the header lines will be erased. Pressing any key will advance to the next trace point. A total of 26 trace points are displayed and older trace points are lost as execution progresses. A ">" character denotes the current trace point. The CPU, line number from the source file, a short message and two parameters are displayed in each trace point. When Boot Trace is enabled two columns of trace information will be displayed one the bottom two thirds of the screen.
When booting from a Linux system with LILO or GRUB add "btrace" to the boot options line. All of the released images have a boot option to start the test with boot tracing enabled. However, most problems occur during startup so the boot option is the preferred method. With trace information many of these faults may now be resolved.Įnabling Boot Trace - The boot trace feature is enabled with either a boot time option or an on-line command. With the very large variety of computer hardware available it is impossible to test MemTest86 an all platforms and some incompatibilities exist causing failures. In Version 4.1.0 a Boot Trace feature was added that provides a simple mechanism for troubleshooting of test failures by both technical and non-technical users.
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