1. 29 Aug, 2009 1 commit
    • Simon Marlow's avatar
      Unify event logging and debug tracing. · a5288c55
      Simon Marlow authored
        - tracing facilities are now enabled with -DTRACING, and -DDEBUG
          additionally enables debug-tracing.  -DEVENTLOG has been
        - -debug now implies -eventlog
        - events can be printed to stderr instead of being sent to the
          binary .eventlog file by adding +RTS -v (which is implied by the
          +RTS -Dx options).
        - -Dx debug messages can be sent to the binary .eventlog file
          by adding +RTS -l.  This should help debugging by reducing
          the impact of debug tracing on execution time.
        - Various debug messages that duplicated the information in events
          have been removed.
  2. 05 Aug, 2009 1 commit
  3. 02 Aug, 2009 1 commit
    • Simon Marlow's avatar
      RTS tidyup sweep, first phase · a2a67cd5
      Simon Marlow authored
      The first phase of this tidyup is focussed on the header files, and in
      particular making sure we are exposinng publicly exactly what we need
      to, and no more.
       - Rts.h now includes everything that the RTS exposes publicly,
         rather than a random subset of it.
       - Most of the public header files have moved into subdirectories, and
         many of them have been renamed.  But clients should not need to
         include any of the other headers directly, just #include the main
         public headers: Rts.h, HsFFI.h, RtsAPI.h.
       - All the headers needed for via-C compilation have moved into the
         stg subdirectory, which is self-contained.  Most of the headers for
         the rest of the RTS APIs have moved into the rts subdirectory.
       - I left MachDeps.h where it is, because it is so widely used in
         Haskell code.
       - I left a deprecated stub for RtsFlags.h in place.  The flag
         structures are now exposed by Rts.h.
       - Various internal APIs are no longer exposed by public header files.
       - Various bits of dead code and declarations have been removed
       - More gcc warnings are turned on, and the RTS code is more
       - More source files #include "PosixSource.h", and hence only use
         standard POSIX (1003.1c-1995) interfaces.
      There is a lot more tidying up still to do, this is just the first
      pass.  I also intend to standardise the names for external RTS APIs
      (e.g use the rts_ prefix consistently), and declare the internal APIs
      as hidden for shared libraries.
  4. 13 Apr, 2009 1 commit
  5. 17 Mar, 2009 1 commit
    • Simon Marlow's avatar
      Add fast event logging · 8b18faef
      Simon Marlow authored
      Generate binary log files from the RTS containing a log of runtime
      events with timestamps.  The log file can be visualised in various
      ways, for investigating runtime behaviour and debugging performance
      problems.  See for example the forthcoming ThreadScope viewer.
      New GHC option:
        -eventlog   (link-time option) Enables event logging.
        +RTS -l     (runtime option) Generates <prog>.eventlog with
                    the binary event information.
      This replaces some of the tracing machinery we already had in the RTS:
      e.g. +RTS -vg  for GC tracing (we should do this using the new event
      logging instead).
      Event logging has almost no runtime cost when it isn't enabled, though
      in the future we might add more fine-grained events and this might
      change; hence having a link-time option and compiling a separate
      version of the RTS for event logging.  There's a small runtime cost
      for enabling event-logging, for most programs it shouldn't make much
      (Todo: docs)