‘Lightweight performance tools’.
Likwid stands for ‘Like I knew what I am doing’. This project contributes easy to use command line tools for Linux to support programmers in developing high performance multi-threaded programs. It contains the following tools: likwid-topology: Show the thread and cache topology likwid-perfctr: Measure hardware performance counters on Intel and AMD processors likwid-features: Show and Toggle hardware prefetch control bits on Intel Core 2 processors likwid-pin: Pin your threaded application without touching your code (supports pthreads, Intel OpenMP and gcc OpenMP) likwid-bench: Benchmarking framework allowing rapid prototyping of threaded assembly kernels likwid-mpirun: Script enabling simple and flexible pinning of MPI and MPI/threaded hybrid applications likwid-perfscope: Frontend for likwid-perfctr timeline mode. Allows live plotting of performance metrics. likwid-powermeter: Tool for accessing RAPL counters and query Turbo mode steps on Intel processor. likwid-memsweeper: Tool to cleanup ccNUMA memory domains.No kernel patching required. (via kellabyte)
Because Backblaze has a history of openness, many readers expected more details in my previous posts. They asked what drive models work best and which last the longest. Given our experience with over 25,000 drives, they asked which ones are good enough that we would buy them again. In this post, I’ll answer those questions.