Native POSIX Thread Library: Difference between revisions

Revision as of 08:32, 19 October 2021

Revision as of 13:54, 1 August 2022

Line 16:

NPTL uses a similar approach to LinuxThreads, in that the primary abstraction known by the kernel is still a process, and new threads are created with the clone() [[system call]] (called from the NPTL library). However, NPTL requires specialized kernel support to implement (for example) the contended case of synchronisation primitives which might require threads to sleep and wake again. The primitive used for this is known as a [[futex]].

NPTL is a so-called 1×11:1 threads library, in that threads created by the userlibrary (via the <code>''pthread_create()</code> library function'') are in 1one-1to-one correspondence with schedulable entities in the kernel (tasks''processes'', in the Linux case).<ref name="lsp-love">{{Cite book |title=Linux System Programming |author=Robert Love |edition=2nd |isbn=1449339530 |date=2013}}</ref> This is the simplest possibleof the three [[Thread (computing)#Threading models|threading implementationmodels]] (1:1, N:1, and M:N).<ref name="lsp-love"></ref>

An alternative to NPTL's 1×1 model is the [[Thread_%28computer_science%29#M:N_.28hybrid_threading.29|''m×n'' model]].

==See also==