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Autodetect number of CPU cores for softfilter.

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This commit is contained in:
Themaister 2014-04-15 17:55:40 +02:00
parent d17392b835
commit 980eefdd8c
3 changed files with 42 additions and 1 deletions
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4
gfx/filter.c
View File

@ -156,7 +156,7 @@ rarch_softfilter_t *rarch_softfilter_new(const char *filter_path,
filt->max_height = max_height;
filt->impl_data = filt->impl->create(input_fmt, input_fmt, max_width, max_height,
threads != RARCH_SOFTFILTER_THREADS_AUTO ? threads : 1, cpu_features);
threads != RARCH_SOFTFILTER_THREADS_AUTO ? threads : rarch_get_cpu_cores(), cpu_features);
if (!filt->impl_data)
{
RARCH_ERR("Failed to create softfilter state.\n");
@ -170,6 +170,8 @@ rarch_softfilter_t *rarch_softfilter_new(const char *filter_path,
goto error;
}
RARCH_LOG("Using %u threads for softfilter.\n", threads);
filt->packets = (struct softfilter_work_packet*)calloc(threads, sizeof(*filt->packets));
if (!filt->packets)
{

38
performance.c
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@ -71,6 +71,10 @@
#include <emscripten.h>
#endif
#if defined(BSD) || defined(__APPLE__)
#include <sys/sysctl.h>
#endif
#include <string.h>
#define MAX_COUNTERS 64
@ -289,6 +293,40 @@ static void arm_enable_runfast_mode(void)
}
#endif
unsigned rarch_get_cpu_cores(void)
{
#if defined(_WIN32) && !defined(_XBOX) // Win32
SYSTEM_INFO sysinfo;
GetSystemInfo(&sysinfo);
return sysinfo.dwNumberOfProcessors;
#elif defined(_SC_NPROCESSORS_ONLN) // Linux, most unix-likes.
long ret = sysconf(_SC_NPROCESSORS_ONLN);
if (ret <= 0)
return 1;
return ret;
#elif defined(BSD) || defined(__APPLE__) // BSD
// Copypasta from stackoverflow, dunno if it works.
int num_cpu = 0;
int mib[4];
size_t len = sizeof(num_cpu);
mib[0] = CTL_HW;
mib[1] = HW_AVAILCPU;
sysctl(mib, 2, &num_cpu, &len, NULL, 0);
if (num_cpu < 1)
{
mib[1] = HW_NCPU;
sysctl(mib, 2, &num_cpu, &len, NULL, 0);
if (num_cpu < 1)
num_cpu = 1;
}
return num_cpu;
#else
// No idea, assume single core.
return 1;
#endif
}
uint64_t rarch_get_cpu_features(void)
{
uint64_t cpu = 0;

1
performance.h
View File

@ -55,6 +55,7 @@ static inline void rarch_perf_stop(struct retro_perf_counter *perf)
}
uint64_t rarch_get_cpu_features(void);
unsigned rarch_get_cpu_cores(void);
// Used internally by RetroArch.
#if defined(PERF_TEST) || !defined(RARCH_INTERNAL)