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Microbenchmarking IHPCL clusters

Microbenchmarking IHPCL clusters. Neil Bright 3/26/2001. fd = open() buffer = mmap(fd, size) close(fd) x = buffer[4] munmap(buffer, size). File I/O vs. mmap. fd = open() read(fd, buffer, size) x = buffer[4] close(fd). File I/O vs. mmap (cont.). Memory Latency (nanoseconds).

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Microbenchmarking IHPCL clusters

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  1. Microbenchmarking IHPCL clusters Neil Bright 3/26/2001

  2. fd = open() buffer = mmap(fd, size) close(fd) x = buffer[4] munmap(buffer, size) File I/O vs. mmap • fd = open() • read(fd, buffer, size) • x = buffer[4] • close(fd)

  3. File I/O vs. mmap (cont.)

  4. Memory Latency (nanoseconds)

  5. Memory Bandwidth (MB/sec)

  6. PCI 2.0 33Mhz, 32 bit • 132 Mbytes/sec • PCI 2.0 66Mhz, 64 bit • 528 Mbytes/sec • SCSI 160 • 160 Mbytes/sec • Quantum Atlas 10KII SCSI160 • 60 Mbytes/sec • Gigabit Ethernet • 125 Mbytes/sec

  7. 2.2 Myrinet 2.2 Gigabit Ethernet 2.4 Gigabit Ethernet Network Hardware • TCP Bandwidth • UDP Bandwidth • TCP Latency

  8. TCP Bandwidth Throughput CPU utilization (Mb/sec) Sender Receiver 256.09 48.37 54.33 Linux 2.2.16-3smp gm 1.2.3 212.23 28.20 27.46 Linux 2.2.16-3smp e1000 3.0.7 273.70 2.09 0.35 Linux 2.4.3-pre4-smp-pae e1000 3.0.7 Confidence Intervals Throughput Local CPU Remote CPU 0.00% 0.00% 0.00% Linux 2.2.16-3smp gm 1.2.3 0.00% 0.00% 0.00% Linux 2.2.16-3smp e1000 3.0.7 3.50% 50.60% 537.30% Linux 2.4.3-pre4-smp-pae e1000 3.0.7 8,192 byte messages 57,344 byte buffers

  9. UDP Bandwidth

  10. TCP Latency

  11. Impact of driver on performance Throughput CPU utilization (Mb/sec) Sender Receiver 167.67 35.81 51.19 Linux 2.2.16-3smp e1000 2.0.6 186.55 31.70 48.30 Linux 2.2.16-3smp e1000 2.5.14 212.23 28.20 27.46 Linux 2.2.16-3smp e1000 3.0.7 8,192 byte messages 57,344 byte buffers

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