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The process running get stuck around 32 000 (± 5%)
~# cat /proc/sys/kernel/threads-max
127862
~# ulimit -s
stack size (kbytes, -s) 2048
free memory available : 3,5 Go
Further more when I try basic command while the process is stuck like “top”, I get the bash message : can’t fork, not enough memory.
Even if there is still 3,5 Go of free memory.
What could be limit the thread creation at 32 000 ?
Threads are identified with Thread IDs (TIDs), which are just PIDs in Linux, and…
PIDs in Linux are 16-bit, and 32768 is already the maximum value allowed. With that many threads, you have just completely filled the operating system process table. I don’t think you will be able to create more threads than that.
Anyways, there is something really wrong with your design if you need that many threads. There is really no justification to have that many.