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SchedLat: a Low Tech Script for Measuring Process CPU Scheduling Latency on Linux

As you may know, I like to use low tech scripts when possible, ideally such ones that don’t even require you to be root. I prefer simple and “boring” tools as a starting point simply because of the production reality at my customers in traditional enterprise IT. Systems where RHEL6 (and clones) seem to be the most common distros (with Linux kernel 2.6.32) and it’s not too unusual to see RHEL5 occasionally either.