DCPI V3.8 for Tru64 UNIX Release Notes



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Changes since release V3.4

  • Supports ProfileMe counters on EV67 (Alpha 21264a) cpus! (See "man dcpiprofileme" and "man dcpid")
  • Dcpiprof and dcpilist require "-help" to list descriptions of their many flags.
  • Dcpid's command syntax for selecting events has changed (see man dcpid). The new syntax supports multiplexing of profile-me modes with aggregate (i.e., non-profileme) modes.
  • A new tool, dcpitopcounts, lists instructions with the highest event counts (see man dcpitopcounts).
  • Dcpid supports a new -nice option to adjust its scheduling priority, and a new -gc option to automatically delete old epochs.
  • Support for Tru64 V4.0c and earlier has been dropped. Use DCPI-V3.4 for V4.0 through V4.0c.

Known problems

  • When collecting data using multiple "-slot"s, each slot must have at least one event that occurs at least every 2^30 cycles, e.g., retires, cycles, issues, or profileme mode. Dcpid does not check this requirement


Changes since release V2.12

  • Pcount driver is dynamically loadable.
  • Dcpid loads pcount at startup and unloads it at exit.
  • A new underlying profile file format is used to store sample data for all events in a single file per image. Backwards compatibility has been retained so that all tools support profiles collected with previous versions of DCPI.
  • Dcpid supports a new -nice option to adjust its scheduling priority, and a new -gc option to automatically delete old epochs.
  • Fixed a rare assertion failure in instruction-level analysis tools.
  • This version works with Digital Unix T5.0 646.2 (a.k.a. BL17)
  • Support for Digital Unix 3.2 has been dropped. Use DCPI-V2.11 and pcount-13.3 build 15 for machines running 3.2.

Changes since release V2.11

  • Added support for Alpha 21066 and other 21064-compatible cpus.

Changes since release V2.10

  • Adds support for compressed kernel modules.
  • dcpiprof listings now contain information about which named procedure is near an anonymous procedure to help the user in finding anonymous procedures.
  • Changes since release V2.5:
  • DCPI releases V2.6 through V2.9 each had incompatibilities with various versions of Digital Unix. We believe that these problems have been corrected.
  • New loader for 4.0c and higher. Dynamically linked images can be profiled on machines running DU V3.2 or V4.0*, but not V5.0*. The INSTALL script tests the DCPI loader before installing it as the default system loader.
  • Minor improvements to dcpid image identification. Image maps for common DU V4.0c and V4.0d binaries are compiled into dcpid. Fixed identification of large images started before dcpid.
  • Major update to dcpi2pix to generate more accurate data.
  • Added support for new 21264 instructions.