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In the event of a kernel crash, kdump preserves system consistency by booting another Linux kernel, which is known as the dump-capture kernel, and using it to export and save a memory dump. As a result, the system boots into a clean and reliable environment instead of relying on an already crashed kernel that may cause various issues, such as ...
An oops may precede a kernel panic, but it may also allow continued operation with compromised reliability. The term does not stand for anything, other than that it is a simple mistake. The term does not stand for anything, other than that it is a simple mistake.
User-mode memory dump, also known as minidump, [23] is a memory dump of a single process. It contains selected data records: full or partial (filtered) process memory; list of the threads with their call stacks and state (such as registers or TEB ); information about handles to the kernel objects; list of loaded and unloaded libraries .
Related techniques often include various tracing techniques like examining log files, outputting a call stack on the crash, [8] and analysis of memory dump (or core dump) of the crashed process. The dump of the process could be obtained automatically by the system (for example, when the process has terminated due to an unhandled exception), or ...
As a copy-on-write (CoW) file system for Linux, Btrfs provides fault isolation, corruption detection and correction, and file-system scrubbing. If the file system detects a checksum mismatch while reading a block, it first tries to obtain (or create) a good copy of this block from another device – if its internal mirroring or RAID techniques are in use.
If the memory access time is 0.2 μs, then the page fault would make the operation about 40,000 times slower. Performance optimization of programs or operating systems often involves reducing the number of page faults. Two primary focuses of the optimization are reducing overall memory usage and improving memory locality.
Valgrind (/ ˈ v æ l ɡ r ɪ n d /) [6] is a programming tool for memory debugging, memory leak detection, and profiling. Valgrind was originally designed to be a freely licensed memory debugging tool for Linux on x86 , but has since evolved to become a generic framework for creating dynamic analysis tools such as checkers and profilers.
Dynamic binary instrumentation system that allows users to create custom program analysis tools. Proprietary but free for non-commercial use Rational PurifyPlus: AIX, Linux, Solaris, Windows Performance profiling tool, memory debugger and code coverage tool. Proprietary Scalasca: Linux C/C++, Fortran Parallel trace analyser. Free/open source ...