1. DataTAG CERN Oct 2002 R. Hughes-Jones Manchester Initial Performance Measurements With DataTAG PCs Gigabit Ethernet NICs (Work in progress Oct 02)

2. DataTAG CERN Oct 2002 R. Hughes-Jones Manchester UDP Latency: Intel onboard b2b Motherboard: SuperMicro P4DP8 Chipset: CPU: P4 2.2 GHz PCI:64 bit 66 MHz RedHat 7.3 Kernel 2.4.19 Latency high Interrupt coalesance Latency NOT well behaved Slope Expect: PCI0.00188 GigE0.008 PCI0.00188 0.0118 us/byte

3. DataTAG CERN Oct 2002 R. Hughes-Jones Manchester UDP Latency: Intel onboard b2b Motherboard: SuperMicro P4DP8 Chipset: CPU: P4 2.2 GHz PCI:64 bit 66 MHz RedHat 7.3 Kernel 2.4.19 Max throughput 980Mbit/s No packet loss 30% CPU utilisation

4. DataTAG CERN Oct 2002 R. Hughes-Jones Manchester UDP Latency: SysKonnect b2b Motherboard: SuperMicro P4DP8 Chipset: CPU: P4 2.2 GHz PCI:64 bit 66 MHz RedHat 7.3 Kernel 2.4.19 Latency low Interrupt every packet Latency well behaved Slope 0.022 us/byte Expect: PCI0.00188 GigE0.008 PCI0.00188 0.0118 us/byte

5. DataTAG CERN Oct 2002 R. Hughes-Jones Manchester UDP Throughput: SysKonnect b2b Motherboard: SuperMicro P4DP8 Chipset: CPU: P4 2.2 GHz PCI:64 bit 66 MHz RedHat 7.3 Kernel 2.4.19 Max throughput 980Mbit/s No packet loss 30% utilisation Sender after wire speed

6. DataTAG CERN Oct 2002 R. Hughes-Jones Manchester UDP Latency: SysKonnect b2b with switch Motherboard: SuperMicro P4DP8 Chipset: CPU: P4 2.2 GHz PCI:64 bit 66 MHz RedHat 7.3 Kernel 2.4.19 Latency low Interrupt every packet Latency well behaved Slope 0.028 us/byte Expect: PCI0.00188 GigE0.008 PCI0.00188 0.0118 us/byte

7. DataTAG CERN Oct 2002 R. Hughes-Jones Manchester UDP Throughput: SysKonnect b2b with switch Motherboard: SuperMicro P4DP8 Chipset: CPU: P4 2.2 GHz PCI:64 bit 66 MHz RedHat 7.3 Kernel 2.4.19 Max throughput 980Mbit/s No packet loss 30% utilisation Sender ~30 % utilisation Receiver

8. DataTAG CERN Oct 2002 R. Hughes-Jones Manchester UDP Throughput: SysKonnect Chicago - CERN Motherboard: SuperMicro P4DP8 Chipset: CPU: P4 2.2 GHz PCI:64 bit 66 MHz RedHat 7.3 Kernel 2.4.19 Max throughput 980Mbit/s No packet loss Packet loss when sending > wire rate

9. DataTAG CERN Oct 2002 R. Hughes-Jones Manchester UDP Throughput: SysKonnect Chicago - CERN Motherboard: SuperMicro P4DP8 Chipset: CPU: P4 2.2 GHz PCI:64 bit 66 MHz RedHat 7.3 Kernel 2.4.19 Max throughput 980Mbit/s No packet loss 30% utilisation Sender ~30 % utilisation Receiver