On 03/09/2013 12:24 AM, Amm wrote: > In short, for best results and to make sure that each worker uses separate core > and dont end up using same core, one must use cpu_affinity_map as well? > > Am I correct? Based on our experience, yes. Similarly, keeping other significant activities (e.g., NIC interrupt handling) away from Squid CPU cores may help with performance. I suspect this "we know better than the kernel!" approach works well for Squid-dedicated servers. It may not be a good idea for general-purpose servers where there are many different processes competing for scarce CPU cycles. Kernel algorithms ought to work better than rigid affinity schemes in those cases. BTW, there are command-line tools that can set or change CPU affinity of a process (e.g., taskset), but cpu_affinity_map is usually easier to use when it comes to Squid kids. Cheers, Alex.
