document: A multi-threaded PIPELINED Web server architecture for SMP\/SoC machines Design of high performance Web servers has become a recent research thrust to meet the increasing demand of network-based services . In this paper , we propose a new Web server architecture , called multi-threaded PIPELINED Web server , suitable for Symmetric Multi-Processor ( SMP ) or System-on-Chip ( SoC ) architectures . The proposed PIPELINED model consists of multiple thread pools , where each thread pool consists of five basic threads and two helper threads . The main advantages of the proposed model are global information sharing by the threads , minimal synchronization overhead due to less number of threads , and non-blocking I\/O operations , possible with the helper threads . We have conducted an in-depth performance analysis of the proposed server model along with four prior Web server models ( Multi-Process ( MP ) , Multi-Thread ( MT ) , Single-Process Event-Driven ( SPED ) and Asynchronous Multi-Process Event-Driven ( AMPED ) ) via simulation using six Web server workloads . The experiments are conducted to investigate the impact of various factors such as the memory size , disk speed and numbers of clients . The simulation results indicate that the proposed PIPELINED Web server architecture shows the best performance across all system and workload parameters compared to the MP , MT , SPED and AMPED models . Although the MT and AMPED models show competitive performance with less number of processors , the advantage of the PIPELINED model becomes obvious as the number of processors or clients in an SMP\/SoC machine increases . The MP model shows the worst performance in most of the cases . The results indicate that the proposed server architecture can be used in future large-scale SMP\/SoC machines to boost system performance .
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