Main / Educational / Cachegrind
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Cachegrind simulates how your program interacts with a machine's cache hierarchy and (optionally) branch predictor. It simulates a machine with independent. Valgrind's Tool Suite. The Valgrind distribution includes the following debugging and profiling tools: Memcheck; Cachegrind; Callgrind; Massif; Helgrind; DRD. The profiler in Xdebug outputs profiling information in the form of a Cachegrind compatible file. This allows you to use the excellent KCacheGrind tool (Linux.
This is the homepage of the profiling tool Callgrind and the profile data visualization KCachegrind. Both are licensed under GPL V2. Callgrind uses runtime. Detailed technical documentation on how Cachegrind works is available in How Cachegrind works. If you only want to know how to use it, this is the page you. Profiling Cache Usage with Cachegrind. Cachegrind simulates your program's interaction with a machine's cache hierarchy and (optionally) branch predictor.
In a write-allocate cache, as simulated by Valgrind, the write cannot miss, since it immediately follows the read which will drag the block into the cache if it's not. When your application is slow, you need a profiler. Paul Floyd shows us how callgrind and cachegrind can help. Out of curiosity I ran coded up several different versions of matrix Multiplication and ran cachegrind against it. In my results below, I was. The majority of files there are digitmedianet.com* files and it seems that this is a known issue with xdebug: php - XAMPP tmp folder oversized.