using tbb22_004oss on Redhat64bit, dual Xeon X5550 processor.

We have an application which creates two pipelines to run concurrently. This is achieved by spawning a tbb_thread, then creating and calling the pipeline.run command, exiting when complete.

Pipeline 1 has 7 filters, ordered as:
serial_in_order
parallel
parallel
parallel
serial_in_order
parallel
serial_in_order

Pipeline 2 has 6 filters, of a similar scheduling system

flight tokens are set to 12 and 6 respectively (pipeline 1 takes substantially longer to process than 2)

In general, the application runs spectacularly well. It typically processes between 150-1500 'blobs' of data and exits cleanly - each time, every time.

However, during our release testing, I put 15,000 blobs through it and found than, although pipeline 2 exits first as normal, pipeline 1 now never exits. This happens each time, every time, with any data count over 9000 (might be a bit less - but 3000 works fine).

The way we're exiting the pipeline is for the first filter to return NULL when it runs out of data. I've stuck printf() all over the application and can confirm the first filter is correctly returning NULL, but the pipeline->run() command is never exiting.

Any ideas?

cheers,

Mat