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Apparatus and method for high performance implementation of system calls

  • US 6,260,057 B1
  • Filed: 03/01/1995
  • Issued: 07/10/2001
  • Est. Priority Date: 03/01/1995
  • Status: Expired due to Term
First Claim
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1. A method for improving an execution time of a system call issued by a software thread in a data processing system, comprising:

  • initiating the system call of the software thread; and

    performing the system call, including checking whether a slow path flag for the thread is set, performing, when the slow path flag is set, instructions placed in a slow instruction path, and performing, when the slow path flag is clear, instructions placed in a fast instruction path to avoid at least one of a pre-test or a post-test in connection with the system call when the at least one pre-test or post-test is known to be inapplicable.

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