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Get cpu info from /sys where possible.

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Fixes #4215.  May impact texture scaling performance.
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Unknown W. Brackets 2013-10-16 22:56:20 -07:00
parent 435a171192
commit 01f97b1662
1 changed files with 21 additions and 0 deletions
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21
Common/ArmCPUDetect.cpp
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@ -23,6 +23,8 @@
// Only Linux platforms have /proc/cpuinfo // Only Linux platforms have /proc/cpuinfo
#if !defined(BLACKBERRY) && !defined(IOS) && !defined(__SYMBIAN32__) #if !defined(BLACKBERRY) && !defined(IOS) && !defined(__SYMBIAN32__)
const char procfile[] = "/proc/cpuinfo"; const char procfile[] = "/proc/cpuinfo";
// https://www.kernel.org/doc/Documentation/ABI/testing/sysfs-devices-system-cpu
const char syscpupresentfile[] = "/sys/devices/system/cpu/present";
char *GetCPUString() char *GetCPUString()
{ {
@ -148,6 +150,25 @@ int GetCoreCount()
char buf[1024]; char buf[1024];
FILE *fp; FILE *fp;
fp = fopen(syscpupresentfile, "r");
if (fp)
{
fgets(buf, sizeof(buf), fp);
fclose(fp);
int low, high;
// Technically, this could be "1-2,4,8-23" but for ARM devices that seems unlikely.
int found = sscanf(buf, "%d-%d", &low, &high);
// Only a single number, so just one slot/core (actually threads.)
if (found == 1)
return 1;
if (found == 2)
return high - low + 1;
// Okay, let's fall back.
}
fp = fopen(procfile, "r"); fp = fopen(procfile, "r");
if (!fp) if (!fp)
return 0; return 0;