Custom Tractor blade

This repository holds files that patches Tractor's blade Python code files.

The blade Python files are located in:

C:\Program Files\Pixar\Tractor-2.4\lib\python2.7\Lib\site-packages\tractor\apps\blade

Scripts

To update the code of the blades we have the following scripts:

update_tractor_blade.ps1

Copies all the patched files in the blade folder to the windows location defined above. Then it restarts the service if any of those files were changed

open_blade_port.ps1

Set the Blade service to auto restart and start it. Add a firewall rule to open the 9005 port needed to communicate with the Tractor engine.

Files

blade/TractorSiteStatusFilter.py

Execute custom code on every log line

• Added the ability to stop the process on errors that didn't return any error code (!= 0)

  exceptions = [
    "CRASHED in RaiseException",
    "Building Embree Voxel Tree failed",
    "V-Ray: Exception in CORE",
    "Failed batch render",
    "V-Ray encountered fatal error",
    "Error opening these alembic files",
  ]
  
  # ...
  
  if any([(exception in textline) for exception in self.exceptions]):
    return (self.TR_LOG_FATAL_CODE, -1234, textline)

• Added support for Blender progress style

  Use self.TR_LOG_ALSO_EMIT + self.TR_LOG_PROGRESS in the flags to emit it

  Fra:1 Mem:29.11M (Peak 29.39M) | Time:00:52.88 | Remaining:01:23.14 | Mem:7.77M, Peak:7.90M | Scene, View Layer | Rendered 46/128 Tiles
  

  RE_BLENDER_PROGRESS = re.compile("Rendered ([0-9]+\/[0-9]+) Tiles")
  
  def extract_blender_progress(line):
      result = RE_BLENDER_PROGRESS.search(line)
  
      if result:
          ratio = result.group(1)
          rendered, total = ratio.split("/")
          return 100 * float(rendered) / float(total)
  
      return None

blade/TrBladeMain.py

Blade parameters and main function

• Changed progress emit interval to 0.1s for faster feedback

  optparser.add_option("--progresslimit", dest="progresslimit",
    type="float", default=0.1, metavar="SECS",
    help="max frequency of percent-done updates, in seconds")

blade/TrBladeRunner.py

Blade main event loop handling processes and kill...

• See who requested a kill on a particular task (storing in an array like command ids to kill):

  self.cidsToBeSweptReqBy = []
  # ...
  
  # Line 1080
  def checkPids(self, now):
    for c in self.activeCmds:
      cmd_tuple = (c.jid, "%d.%d" % (c.cid, c.rev))
  
      if c.process and cmd_tuple in self.cidsToBeSwept:
        msg = "Received kill from Tractor engine (requested by %s) (spooled by %s) pid=%d" % (reqby, c.logref, c.pid)
        self.logger.info( msg )
        c.SaveOutput( msg )

blade/TrCmdTracker.py

Responsible for handling the command itself

blade/TrSubprocess.py

Handle the command process

• Ability to properly kill a process running in a Rez environment.

  See: AcademySoftwareFoundation/rez#1250

  On Windows it kills the whole process tree instead of just the Rez process.

  # line 581
  def send_signal(self, sig):
    if subprocess.mswindows:
      subprocess.call(['taskkill', '/F', '/T', '/PID', str(self.pid)])

blade/TrSysState.py

Responsible for the blade information and system

• Change the resolution order of GPU on Windows

  It executes wmic path win32_VideoController get name which returns the following:

  Name
  NVIDIA GeForce GTX 1060 6GB
  Intel(R) HD Graphics 630
  

  Previously it was taking the last GPU on the list

  Now if it takes an NVIDIA it has the priority over other cards:

  def resolveGPU_Windows(self, argv, exclusions):
    # ...
  
    n = 0
    id = None
    for x in r.strip().split(b"\n"):
        x = x.strip()
        if x != b"Name":
            n += 1
  
            if id is None or not b"NVIDIA" in id:
                id = x