Posts with the tag cpu:

How perf(1) works, or asking my CPU about their feelings.

Perf is a performance analysis tool for Linux. It instrumentalizes events setup by the kernel to monitor applications. While it makes sense that kernel events are available to a tool implemented inside the kernel, how can perf know about CPU metrics, such as the number of instructions a program executed?

Chip binning : why your CPU is most likely broken (partially)?

CPU manufacturing is so complex that the chips often have imperfections. Some cores do not work or must run at lower speeds. Manufacturers test them and sell based on performance.