Where is pthread stack min defined

The default size for the reserved and initially committed stack memory is specified in the executable file header. Thread or fiber creation fails if there is not enough memory to reserve or commit the number of bytes requested.

The default stack reservation size used by the linker is 1 MB. The operating system rounds up the specified size to the nearest multiple of the system's allocation granularity typically 64 KB. To retrieve the allocation granularity of the current system, use the GetSystemInfo function.

This value is rounded up to the nearest page. Generally, the reserve size is the default reserve size specified in the executable header. When successfully run then it gives 0 otherwise gives any value.

First argument — It takes pthread attribute. Second argument — It takes a variable and give the size of the thread attribute. When successfully run then it gives 0 otherwise if error gives any value.

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You can experiment with the code segment that they provide and see that if you do not allocate enough stack space that it is possible to have your program segfault. The default stack size per thread is usually very large on most implementations of pthreads. The actual limit will probably be based upon per process address space limits on your specific system. It is not going to grow larger than that, unless you tell it to by adjusting it yourself before you create the thread s.

Note: the example in the link is for trying to minimize stack usage, and finding a minimum which is dangerous, without a lot of testing. Sort of the opposite of what you seem to want to do, but the example may still be helpful to you. Just approach it differently. In general, you should probably not need to raise the pthread stack size above the default. If you find you do, you probably should try understand why that is happening. It's fairly unusual.

If you could explain what's actually happening in your own code, instead of a general question, other solutions might present themselves. I'm wondering if you are actually trying to reduce the per thread stack size, and just not explaining yourself clearly.

If that's the case, the link might be helpful for that reason as well. That is the pre-determined stack size for all newly created threads by default. So, to answer your question precisely, no you cannot set the max stack size of a thread using POSIX library. Thanx 7 Replies. RedHat Commands. OpenSolaris Commands. Linux Commands. SunOS Commands. FreeBSD Commands. Full Man Repository. Advanced Search. Contact Us. Forum Rules. Mark Forums Read. Thread Tools.

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