Workload characterization of multithreaded java servers
Yue Luo, Lizy K. John · 2005
Java has gained popularity in the commercial server arena, but the characteristics of Java server applications are not well understood. In this research, we characterize the behavior of two Java server benchmarks, VolanoMark and SPECjbb2000, on a Pentium III system with the latest Java Hotspot Server VM. We compare Java server applications with SPECint2000 and also investigate the impact of multithreading by increasing the number of clients. Java servers are seen to exhibit poor instruction access behavior, including high instruction miss rate, high ITLB miss rate, high BTB miss rate and, as a result, high I-stream stalls. With increasing number of threads, the instruction behavior improves, suggesting increased locality of access. But the resource stalls increase and eventually dwarf the diminishing I-stream stalls. With more clients, the instruction count per unit work increases and becomes a hindrance to the scalability of the servers.