Messages in this thread | | | From | "Chen, Dennis (SRDC SW)" <> | Subject | semaphore and mutex in current Linux kernel (3.2.2) | Date | Sun, 1 Apr 2012 09:56:44 +0000 |
| |
Documentation/mutex-design.txt:
"- 'struct mutex' is smaller on most architectures: E.g. on x86, 'struct semaphore' is 20 bytes, 'struct mutex' is 16 bytes. A smaller structure size means less RAM footprint, and better CPU-cache utilization." ================================================================ Now in my x86-64 32-bit Linux environment, 'struct semaphone' is 16 bytes, 'struct mutex' is 20 bytes. So seems the RAM footprint advantages are not there...
For the performance advantages followed, I don't have the ./test-mutex and maybe the testing environment, so haven't the 1st hand data for this item...
| |