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Charon-SSP Cloud Instance Prerequisites

General CPU requirements: Charon-SSP requires modern x86-64 architecture processors. This could be Intel Servers based on Haswell v3 processors or later, or Desktop Core I7 (CPU frequency at least 3.0 GHz). AMD processors of the same or higher performance are also supported.

Minimum requirements for Charon-SSP:

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• Minimum memory requirements:

  • 4GB or more of RAM for the Linux host operating system. The actual requirements may be higher and will depend on the requirements of the non-emulator services running on the Linux host. The previous recommendation of at least 2GB of RAM for the Linux host will still be valid for many systems, but the increasing requirements of the Linux operating system and applications have led to the updated recommendation for new installations. Plus:

  • For each emulated SPARC system:
    • The configured memory of the emulated instance, plus:
    • 2GB of RAM (6GB of RAM if server JIT is used) to allow for DIT optimization, emulator requirements, run-time buffers, SMP and graphics emulation.
• If hyper-threading is enabled on modern x86-64 CPUs, two threads can run on one physical CPU core providing two logical CPUs to the host operating system. If possible, disable hyper-threading on the Charon-SSP host. However, this is frequently not possible in VMware and cloud environments, or it is unclear whether hyper-threading is used or not. The Charon-SSP hyper-threading option enables Charon-SSP to adapt to such environments. See the CPU Configuration section in your general Charon-SSP User's Guide mentioned abovefor detailed configuration information. Please note: for best performance, Charon-SSP threads should not share a physical CPU core – enough physical cores should be available on the host system to satisfy the requirements of the configured emulator(s).
• One or more network interfaces, depending on customer requirements.
• Charon-SSP/4U+ and Charon-SSP/4V+ must run on physical hardware supporting Intel VT-x/EPT or AMD-v/NPT (baremetal instances) and therefore cannot run in all cloud environments. Please check your cloud provider's documentation for the availability of such hardware. In addition, note the following points:
  
  • Charon-SSP/4U+ and Charon-SSP/4V+ are only available when using a Linux kernel supported by Stromasys. Please refer to the general Charon-SSP user's guide for details (see CHARON-SSP for Linux).
    
  • Please contact Stromasys or your Stromasys VAR if you need this type of emulated SPARC hardware to discuss your requirements in detail.

Hardware Prerequisites for Charon-AXP Cloud Host Instances

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When starting, the CHARON-VAX software checks the available number of host CPU cores. This check is based on the maximum number of VAX CPUs that can be emulated. Therefore the number of host CPU cores recommended for the maximum number of emulated CPUs - as shown in the right column of the table above - must be available. If the available number of host CPU cores is below this number, CHARON-VAX will issue a warning message. The CHARON-VAX software will work despite this warning.

Hyper-threading must be switched off completely if possible. Normally, hyper-threading is disabled in the BIOS settings. In cloud environments, it depends on the cloud provider if and how the number of vCPUs per core can be limited to one. 

CPU type and speed:

• Since Charon-VAX utilizes the LAHF instruction in VAX CPU emulation don't use early AMD64 and Intel 64 CPUs in a Charon host system since they do not support this instruction. AMD introduced the instruction with their Athlon 64, Opteron and Turion 64 revision D processors in March 2005 and Intel introduced it with the Pentium 4 G1 stepping in December 2005.
• CPU speed: the general recommendation is that the higher the CPU frequency is, the better the emulated VAX performances will be. The minimum recommendation is at least 3 GHz.

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