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christoph2 / pyxcp

ASAM XCP in Python
http://pyxcp.rtfd.org
GNU Lesser General Public License v3.0
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Memory growth issue while using daq mode #171

Open huangbinghao opened 1 week ago

huangbinghao commented 1 week ago

Dear author! I encountered a memory growth issue while using daq mode. Specifically, when I enable synchronization: self._xcp_master.startStopSynch(0x01) # Command Code=0xDD start synch the memory of the process will increase over time: (my own log file) ... Time: 2024-09-24 16:27:22, PID: 454658, RSS: 154.58 MB, VMS: 1857.73 MB, System memory: 2962.98 MB Time: 2024-09-24 16:27:25, PID: 454658, RSS: 155.61 MB, VMS: 1858.98 MB, System memory: 2961.78 MB ... Time: 2024-09-24 16:27:49, PID: 454658, RSS: 164.38 MB, VMS: 1867.23 MB, System memory: 2952.36 MB Time: 2024-09-24 16:27:52, PID: 454658, RSS: 165.41 MB, VMS: 1868.23 MB, System memory: 2954.08 MB ... My software version is: 0.21.11

Look forward to your reply！

huangbinghao commented 1 week ago

I noticed that the self. daqQueue=deque()in the transport/base.py seems to be growing. Is there any suitable release mechanism for this data structure

christoph2 commented 1 week ago

Yes, your're right, the daqQueue should be consumed, otherwise the memory usage grows unbounded...

The handling of received frames could be handled by so called policies; here is a basic example to record raw XCP frames to a proprietary binary file format.

It looks like you are running DAQ lists and here are the good news: DAQ list setup and recording are built-in features in the newest releases.

Please refer to run_daq.py which was tested with CANape's XCPsim and XCPlite. Please note: The XCPlite addresses are certainly not working on your system, so make sure to adapt them -- on the other hand you may start directly with your on DAQ list setup.

There are three further examples ex_mdf, ex_arrow, ex_sqlite. demonstrating what could be done with the recorded DAQ data.

P.S.: I'm currently working hard on documentation (Installation on Linux + tutorial). Please also consider reading this discussion where I've written about some details.