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Status Delivered
Workspace z/TPF Product Family
Categories z/TPF
Created by Guest
Created on Jan 30, 2014

RELATED IDEAS

Performance issue with HTTP_Client_Sync_Send() api

Performance tests for a new application using the
HTTP_Client_Sync_Send function shows that 42% of the CPU cycles are consumed by the SSL_load_error_strings function in CSSL.
This overhead is unecessary because our application is not using the SSL feature and not encountered any errors.
The PMR feedback from IBM reports this is the initialization done every time an ECB gets a cURL handle, but the design is inefficient because:
1) cURL does not verify if the application uses SSL before calling the SSL_load_error_strings initialization.
2) The SSL_load_error_strings is called prior to cURL functions rather than after an actual error is detected.
This RFE is open to request changes to this design so that initialization is only done for those items that the application needs.
The SSL_load_error_strings feature can be suppressed completely using the OPENSSL_NO_ERR option when building the CSSL module. This resolves the performance issue (see attached screen shots) but we would like more documented détails on the effects of this omission should an error occur.
Could you also review PMR 69860,660,706 which describes a memory leak in the same cURL package.

Idea priority High
  • Guest
    Reply
    |     Oct 14, 2015

    Due to processing by IBM, this request was reassigned to have the following updated attributes:
    Brand - Servers and Systems Software
    Product family - z Systems Software
    Product - z/TPF

    For recording keeping, the previous attributes were:
    Brand - WebSphere
    Product family - Transaction Processing
    Product - z/TPF

  • Guest
    Reply
    |     Aug 14, 2014

    This is available with PJ40812 on z/TPF PUT11.

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