SNS - more OS overhead

• Also, hidden costs and overhead

  • VM - likely to page on thread context switches?
  • system call overhead high
    • may even pay this on each thread context switch (because SPARC window pointer privileged)

• TranSend CPU utilization:

CPU states:

0% idle, 28.4% user, 71.6% kernel, 0% iowait, 0% swap

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