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multiprocessor systems

Linux: Configuring RX POLLING (NAPI)

My CentOS / RHEL based server is configured with Intel PRO/1000 network interface cards. NAPI (Rx polling mode) is supported in the e1000 driver. I've multiple CPUs. How do I configure NAPI, decreasing interrupts and improve overall server network performance?
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Linux Detecting: Second CPU / Processor

Q. I've single CPU server system. If another CPU is added to my server, will CentOS Linux recognize it automatically on the next boot? Do I need to configure something?
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