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Thread: OpenCL Object Queries and speed

  1. #1
    Junior Member
    Join Date
    Aug 2010

    OpenCL Object Queries and speed

    This is probably a simple question, but I'm not finding any info since this is likely an implementation issue as opposed to a spec issue.

    How fast are queries like clGetMemObjectInfo? Are they simply lookups in the opaque cl_mem struct or are they more involved? I'm asking because I'm trying to decide how much information to keep track of myself v. how much to simple query through OpenCL calls, particularly for objects like cl_mem that might be used frequently.

  2. #2
    Senior Member
    Join Date
    May 2010
    Toronto, Canada

    Re: OpenCL Object Queries and speed

    As you say, that's going to be implementation-dependent. However, I would expect clGetMemObjectInfo() on any implementation to basically translate to a struct field lookup. The same should hold true for most if not all the other clGetXXXInfo() calls.

    If I were you I would just use the CL calls indiscriminately.
    Disclaimer: Employee of Qualcomm Canada. Any opinions expressed here are personal and do not necessarily reflect the views of my employer. LinkedIn profile.

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