Mar 2001 ATLAS T2UK Meeting R. Hughes-Jones

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Presentation transcript:

Mar 2001 ATLAS T2UK Meeting R. Hughes-Jones Latency Tests with 64-bit PCI hep.man.ac.uk/~rich/atlas/manc_t2uk_mar01.ppt Alteon Gigabit NIC SuperMicro 370DLE ServerWorks III LE Chipset 64 bit PCI @ 33 MHz Request – Response Transfer rates: observe expect 32+32 bit 0.0265 0.0232 -> 108Mbyte/s 32+64 bit 0.0209 0.0211 64+64 bit 0.0149 0.0156 64 byte Request 1400 byte Response Mar 2001 ATLAS T2UK Meeting R. Hughes-Jones

Throughput Tests with 64-bit PCI UDP Stream Vary time between packets 1.6 factor improvement over 32-32 bit transfers Mar 2001 ATLAS T2UK Meeting R. Hughes-Jones

Mar 2001 ATLAS T2UK Meeting R. Hughes-Jones UK LHC Pips Bid Tier 2 Liverpool Edinburgh Glasgow Bid for prototype UK Tier 1 Region Center Value 5.9M pounds 20+20% of CERN compute power 3 layers: Infrastructure Management – middleware Expt. Specific FTE 2003: 15 at RC, 7 at univ. 2001: SJ 2002: 4 Mbit 2003: 25 Mbit 2001: 830 PC 10 TB 2002: 16700 PC 50 TB 2003: 3100 PC 125 TB RAL 2001: 4 Mbit 2002: 25 Mbit 2003: 50 Mbit CERN Mar 2001 ATLAS T2UK Meeting R. Hughes-Jones