叶剑君 wrote: > pthread_create a new thread need how much memory resources? > does the new thread need new stack?
Yes, it allocates a new stack and some small data block. The data is quite small, but will be larger if you use a lot of thread-specific data. (E.g. using recent GCC and "__thread"). The following applies to uClibc-0.9.26, and LinuxThreads: On devices with no MMU, the stack is 16k for new threads, even if you change the initial thread stack size using -Wl,-elf2flt=-s32768 (for example). This is too small for some programs. You can change this using pthread_attr_setstacksize. On devices with an MMU, the stack is allocated on demand, so it only takes as much real memory as the program uses. However, it will use 4M of virtual address range (by default), limiting the number of threads you can create on a 32-bit device with MMU, unless you change this. Enjoy, -- Jamie _______________________________________________ uClinux-dev mailing list uClinux-dev@uclinux.org http://mailman.uclinux.org/mailman/listinfo/uclinux-dev This message was resent by uclinux-dev@uclinux.org To unsubscribe see: http://mailman.uclinux.org/mailman/options/uclinux-dev
