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DroidFish: Improved detection of number of CPU cores to work on HTC One.

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This commit is contained in:
Peter Osterlund 2013-06-15 13:03:49 +00:00
parent cf212ff0ed
commit efb536278f
1 changed files with 28 additions and 4 deletions
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32
DroidFish/src/org/petero/droidfish/engine/DroidComputerPlayer.java
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@ -19,12 +19,16 @@
package org.petero.droidfish.engine;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileFilter;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Locale;
import java.util.regex.Pattern;
import org.petero.droidfish.EngineOptions;
import org.petero.droidfish.Util;
import org.petero.droidfish.book.BookOptions;
import org.petero.droidfish.book.DroidBook;
import org.petero.droidfish.gamelogic.Move;
@ -999,7 +1003,15 @@ public class DroidComputerPlayer {
}
}
/** Try to find out how many CPU cores are present. */
private static final int getNumCPUs() {
int nCPUsFromProc = getNumCPUsFromProc();
int nCPUsFromSys = getNumCPUsFromSys();
int nCPUsFromOS = EngineUtil.getNPhysicalProcessors();
return Math.max(Math.max(nCPUsFromProc, nCPUsFromSys), nCPUsFromOS);
}
private static final int getNumCPUsFromProc() {
int nCPUsFromProc = 1;
try {
FileReader fr = new FileReader("/proc/stat");
@ -1011,12 +1023,24 @@ public class DroidComputerPlayer {
nCPUs++;
}
inBuf.close();
if (nCPUs < 1) nCPUs = 1;
nCPUsFromProc = nCPUs;
if (nCPUs > 1)
nCPUsFromProc = nCPUs;
} catch (IOException e) {
}
int nCPUsFromOS = EngineUtil.getNPhysicalProcessors();
return Math.max(nCPUsFromProc, nCPUsFromOS);
return nCPUsFromProc;
}
private static final int getNumCPUsFromSys() {
File dir = new File("/sys/devices/system/cpu");
File[] files = dir.listFiles(new FileFilter() {
@Override
public boolean accept(File pathname) {
return Pattern.matches("cpu[0-9]+", pathname.getName());
}
});
if (files == null)
return 1;
return Math.max(files.length, 1);
}
private final static void myAssert(boolean b) {