cosmopolitan/libc/testlib/manystack.h

#ifndef COSMOPOLITAN_LIBC_TESTLIB_MANYSTACK_H_
#define COSMOPOLITAN_LIBC_TESTLIB_MANYSTACK_H_
#include "libc/thread/thread.h"
COSMOPOLITAN_C_START_

pthread_t manystack_start(void);
void manystack_stop(pthread_t);

COSMOPOLITAN_C_END_
#endif /* COSMOPOLITAN_LIBC_TESTLIB_MANYSTACK_H_ */
Make threads faster and more reliable This change doubles the performance of thread spawning. That's thanks to our new stack manager, which allows us to avoid zeroing stacks. It gives us 15µs spawns rather than 30µs spawns on Linux. Also, pthread_exit() is faster now, since it doesn't need to acquire the pthread GIL. On NetBSD, that helps us avoid allocating too many semaphores. Even if that happens we're now able to survive semaphores running out and even memory running out, when allocating *NSYNC waiter objects. I found a lot more rare bugs in the POSIX threads runtime that could cause things to crash, if you've got dozens of threads all spawning and joining dozens of threads. I want cosmo to be world class production worthy for 2025 so happy holidays all 2024-12-18 12:59:02 +00:00			`#ifndef COSMOPOLITAN_LIBC_TESTLIB_MANYSTACK_H_`
			`#define COSMOPOLITAN_LIBC_TESTLIB_MANYSTACK_H_`
			`#include "libc/thread/thread.h"`
			`COSMOPOLITAN_C_START_`

			`pthread_t manystack_start(void);`
			`void manystack_stop(pthread_t);`

			`COSMOPOLITAN_C_END_`
			`#endif /* COSMOPOLITAN_LIBC_TESTLIB_MANYSTACK_H_ */`