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LCLS Next Generation Control System platform discussion

LCLS Next Generation Control System platform discussion. Sheng Peng March, 2010. CPU Selection. We are talking about CPU board, not CPU No embedded low-power low-performance mobile CPU is needed We don’t seem to have space/heat issue No need to use embedded CPU core within FPGA

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LCLS Next Generation Control System platform discussion

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  1. LCLS Next Generation Control System platform discussion Sheng Peng March, 2010

  2. CPU Selection • We are talking about CPU board, not CPU • No embedded low-power low-performance mobile CPU is needed • We don’t seem to have space/heat issue • No need to use embedded CPU core within FPGA • Limited capability • Roadmap is not clear • 64-bit • Industrial trend for server/backbone • No need at frontend • Local knowledge has to be counted • PPC .vs. x86 • PPC has nice architecture and AltiVec™ • Consider popularity, software, bus architecture and performance, I prefer x86.

  3. Bus Architecture (Crate Level) • VME bus is getting old and the bandwidth is too low • 2eSST is not widely implemented on slave boards • VXS/VPX is not “VME” anymore • Expensive and not efficiently used • CompactPCI is better than VME • Higher bandwidth • Cheaper • Moving to serial link, i.e. PICMG 2.16 • High speed serial point-to-point link is clearly the future. • ATCA/μTCA (with RTM extension) look great • Great bandwidth • Not too expensive (comparable to VME) • High availability and fully manageable • With PMC carrier and IP carrier if needed

  4. Bus Architecture (local bus) • Only standard bus architecture should be considered • Industry Pack is little brother of “VME” and is slow and old as well. • PMC/PMC-X/XMC are highly preferable over Industry Pack • More and more vendors and COTS available • Much higher bandwidth leads to more applications/choices • AMC (with RTM extension) look great • Choice of COTS AMC IO modules is still limited • But with PMC carrier and IP carrier if needed • COM Express • A PICMG standard • Snap-on solution • PCIe and multi GigaE available

  5. COM Express

  6. Operating System • Well accepted industrial leader shall be selected • Real Time OS is definitely needed in certain application • vxWorks • Real Time Linux should be evaluated (Monta Vista, RTLinux, BlueCat) • Regular OS • Linux (RHEL is good from the experience so far) • 64-bit? Debatable? • Consider the compatibility with ATCA/μTCA and unified development environment, Linux/Real Time Linux solution is attractive

  7. Virtualization • Very attractive technology: • Reduce hardware cost • Improve the availability • Easier management • Many solutions include VMWare, MS Hyper-V and RHEL Xen • VMWare is the leading solution • Hard Real Time IOC with Virtualization • VMWare or WindRiverHyperVisor • Help to isolate subsystem without extra cost to CPU/Crate • Need evaluation (performance concern)

  8. Fieldbus • A lot of types of Fieldbus available • Most of time it is dominated by device • The preference is Ethernet • Cheap • Easy to configure • Well accepted, popular • Real Time performance is achievable to certain level • IEEE 1588 • LXI could be worth a try

  9. PLC • Role of PLC • Reliable interlock (Vacuum) • Safety System • ??? • AB or Siemens? • Both expensive • Should we consolidate to one supplier? • Cheaper solution • Low end of AB? • DirectLogic from AutomationDirect?

  10. FPGA

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