@ -472,17 +472,35 @@ _clState *initCl(unsigned int gpu, char *name, size_t nameSize)
@@ -472,17 +472,35 @@ _clState *initCl(unsigned int gpu, char *name, size_t nameSize)
# ifdef USE_SCRYPT
if ( opt_scrypt ) {
cl_ulong ma = gpus [ gpu ] . max_alloc , mt ;
int pow2 = 0 ;
if ( ! gpus [ gpu ] . lookup_gap ) {
applog ( LOG_DEBUG , " GPU %d: selecting lookup gap of 2 " , gpu ) ;
gpus [ gpu ] . lookup_gap = 2 ;
}
if ( ! gpus [ gpu ] . thread_concurrency ) {
gpus [ gpu ] . thread_concurrency = gpus [ gpu ] . max_alloc / 32768 / gpus [ gpu ] . lookup_gap ;
gpus [ gpu ] . thread_concurrency = ma / 32768 / gpus [ gpu ] . lookup_gap ;
if ( gpus [ gpu ] . shaders & & gpus [ gpu ] . thread_concurrency > gpus [ gpu ] . shaders )
gpus [ gpu ] . thread_concurrency - = gpus [ gpu ] . thread_concurrency % gpus [ gpu ] . shaders ;
applog ( LOG_DEBUG , " GPU %d: selecting thread concurrency of %u " , gpu , gpus [ gpu ] . thread_concurrency ) ;
}
/* If we have memory to spare, try to find a power of 2 value
* > = required amount to map nicely to an intensity */
mt = gpus [ gpu ] . thread_concurrency * 32768 * gpus [ gpu ] . lookup_gap ;
if ( ma > mt ) {
while ( ma > > = 1 )
pow2 + + ;
ma = 1 ;
while ( - - pow2 & & ma < mt )
ma < < = 1 ;
if ( ma > = mt ) {
gpus [ gpu ] . max_alloc = ma ;
applog ( LOG_DEBUG , " Max alloc decreased to %lu " , gpus [ gpu ] . max_alloc ) ;
}
}
}
# endif
@ -776,8 +794,8 @@ built:
@@ -776,8 +794,8 @@ built:
size_t ipt = ( 1024 / gpus [ gpu ] . lookup_gap + ( 1024 % gpus [ gpu ] . lookup_gap > 0 ) ) ;
size_t bufsize = 128 * ipt * gpus [ gpu ] . thread_concurrency ;
/* Always allocate the largest possible buffer allowed, even if we're not initially requiring it
* based on thread_concurrency , giving us some headroom for intensity levels . */
/* Use the max alloc value which has been rounded to a power of
* 2 greater > = required amount earlier */
if ( bufsize > gpus [ gpu ] . max_alloc ) {
applog ( LOG_WARNING , " Maximum buffer memory device %d supports says %u, your scrypt settings come to %u " ,
gpu , gpus [ gpu ] . max_alloc , bufsize ) ;