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| author | Sam Lantinga <slouken@libsdl.org> | 2011-01-27 16:46:15 -0800 |
|---|---|---|
| committer | Sam Lantinga <slouken@libsdl.org> | 2011-01-27 16:46:15 -0800 |
| commit | 4183787d09d2d7a15be955d5b9b5f294138f8826 (patch) | |
| tree | 7577006c5114f07ae95a135ccf4533345223543d /test/testatomic.c | |
| parent | 8fd6096b8908d456f5f6c50b2867b2127cb2a716 (diff) | |
| download | sdl-4183787d09d2d7a15be955d5b9b5f294138f8826.tar.gz | |
Added cache line size info in SDL_cpuinfo.h
I also added an implementation to dynamically query it, but didn't expose it since most x86 CPUs have an L1 cache line size of 64 bytes.
Diffstat (limited to 'test/testatomic.c')
| -rw-r--r-- | test/testatomic.c | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/test/testatomic.c b/test/testatomic.c index ecf134a2a..0c9b13a27 100644 --- a/test/testatomic.c +++ b/test/testatomic.c @@ -243,9 +243,6 @@ void RunEpicTest() #define NUM_WRITERS 4 #define EVENTS_PER_WRITER 1000000 -/* A decent guess for the size of a cache line on this architecture */ -#define CACHELINE 64 - /* The number of entries must be a power of 2 */ #define MAX_ENTRIES 256 #define WRAP_MASK (MAX_ENTRIES-1) @@ -260,22 +257,22 @@ typedef struct { SDL_EventQueueEntry entries[MAX_ENTRIES]; - char cache_pad1[CACHELINE-((sizeof(SDL_EventQueueEntry)*MAX_ENTRIES)%CACHELINE)]; + char cache_pad1[SDL_CACHELINE_SIZE-((sizeof(SDL_EventQueueEntry)*MAX_ENTRIES)%SDL_CACHELINE_SIZE)]; SDL_atomic_t enqueue_pos; - char cache_pad2[CACHELINE-sizeof(SDL_atomic_t)]; + char cache_pad2[SDL_CACHELINE_SIZE-sizeof(SDL_atomic_t)]; SDL_atomic_t dequeue_pos; - char cache_pad3[CACHELINE-sizeof(SDL_atomic_t)]; + char cache_pad3[SDL_CACHELINE_SIZE-sizeof(SDL_atomic_t)]; #ifdef TEST_SPINLOCK_FIFO SDL_SpinLock lock; SDL_atomic_t rwcount; SDL_atomic_t watcher; - char cache_pad4[CACHELINE-sizeof(SDL_SpinLock)-2*sizeof(SDL_atomic_t)]; + char cache_pad4[SDL_CACHELINE_SIZE-sizeof(SDL_SpinLock)-2*sizeof(SDL_atomic_t)]; #endif volatile SDL_bool active; @@ -470,10 +467,10 @@ typedef struct { SDL_EventQueue *queue; int index; - char padding1[CACHELINE-(sizeof(SDL_EventQueue*)+sizeof(int))%CACHELINE]; + char padding1[SDL_CACHELINE_SIZE-(sizeof(SDL_EventQueue*)+sizeof(int))%SDL_CACHELINE_SIZE]; int waits; SDL_bool lock_free; - char padding2[CACHELINE-sizeof(int)-sizeof(SDL_bool)]; + char padding2[SDL_CACHELINE_SIZE-sizeof(int)-sizeof(SDL_bool)]; } WriterData; typedef struct @@ -482,7 +479,7 @@ typedef struct int counters[NUM_WRITERS]; int waits; SDL_bool lock_free; - char padding[CACHELINE-(sizeof(SDL_EventQueue*)+sizeof(int)*NUM_WRITERS+sizeof(int)+sizeof(SDL_bool))%CACHELINE]; + char padding[SDL_CACHELINE_SIZE-(sizeof(SDL_EventQueue*)+sizeof(int)*NUM_WRITERS+sizeof(int)+sizeof(SDL_bool))%SDL_CACHELINE_SIZE]; } ReaderData; static int FIFO_Writer(void* _data) |