performance problems "writer full"

Anything and everything to do with DCP-o-matic.
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markusm
Posts: 5
Joined: Tue Dec 06, 2016 7:51 pm

performance problems "writer full"

Post by markusm »

Hi,

today, i wanted to create a dcp from a blu-ray disk. Nothing unusual, i'm well aquainted with this process.
While the job was running i noticed strange behavior. For a few seconds everything is fine, with the fps ~120. then, the DCP-o-matic GUI starts being sluggish, eventually freezing for a few seconds (Other windows and taskbar etc. are fine, no freezes here) and then resuming with 10-20 fps until reaching ~120 fps again. This happens multiple times per minute.
The job's runtime was ~90 minutes, which is quite bad for my setup and a 2k bluray with ~113 mins.
I tried again with the Sintel Benchmark, it shows the same behavior and a runtime of 8:20 mins, also quite bad i think.

So i went to the log file, and it's full with this message:

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Writer full; pushes 309 to disk while awaiting 60
Sintel: ~5500 log entries
Bluray: ~37500 log entries

In April i did another bluray-conversion, it finished without these log entries in ~40 mins (61 fps)

What's happening here?

currently i have the following setup, everything is on the latest non-test DCP-o-matic-version:

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CPU         Cores   RAM    Disk      Network    OS          Function
i9-13900k   24c/32t 64 GB  NVME-SSD  25 Gbit/s  Windows 11  Master (PC)
i7-12700     8c/ 8t 16 GB  NVME-SSD  25 GBit/s  Debian 12   Slave (VM)
i3-12100     4c/ 8t 32 GB  NVME-SSD  25 Gbit/s  Debian 12   Slave (PC)
i7-13700hx  16c/24t 32 GB  NVME-SSD   1 Gbit/s  Windows 11  Slave (Notebook)
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