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Bug 374454: Better parsing of /proc/cpu

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This commit is contained in:
Marc Khouzam 2012-03-20 21:54:03 -04:00
parent 7ce6b19d32
commit 5161077c11
1 changed files with 24 additions and 21 deletions
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45
dsf-gdb/org.eclipse.cdt.dsf.gdb/src/org/eclipse/cdt/dsf/gdb/internal/CoreList.java
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@ -51,40 +51,43 @@ public class CoreList {
Vector<ICoreInfo> coreInfo = new Vector<ICoreInfo>();
BufferedReader reader = null;
try {
String processorId = null;
String physicalId = null;
String coreId = null;
String cpuCores = null;
Reader r = new InputStreamReader(new FileInputStream(cpuInfo));
reader = new BufferedReader(r);
String line;
while ((line = reader.readLine()) != null) {
line = line.trim();
if (line.startsWith("physical id")) { //$NON-NLS-1$
if (line.startsWith("processor")) { //$NON-NLS-1$
if (processorId != null) {
// We are already at the next 'processor' entry, without
// having found the 'physical id' entry. This means
// there is a single physical CPU.
physicalId = "0"; //$NON-NLS-1$
coreInfo.add(new CoreInfo(processorId, physicalId));
processorId = null;
}
// Found the processor id of this core, so store it temporarily
processorId = line.split(":")[1].trim(); //$NON-NLS-1$
} else if (line.startsWith("physical id")) { //$NON-NLS-1$
// Found the physical id of this core, so store it temporarily
assert physicalId == null;
physicalId = line.split(":")[1].trim(); //$NON-NLS-1$
} else if (line.startsWith("core id")) { //$NON-NLS-1$
// Found core id of this core which come after the entry
// for physical id, so we have both now.
coreId = line.split(":")[1].trim(); //$NON-NLS-1$
} else if (line.startsWith("cpu cores")) { //$NON-NLS-1$
// Found CPU core count which comes after the entry
// for core id, so we have all three by now.
cpuCores = line.split(":")[1].trim(); //$NON-NLS-1$
int cid = Integer.parseInt(coreId);
int pid = Integer.parseInt(physicalId);
int cores_per_pid = Integer.parseInt(cpuCores);
String absoluteCoreID = Integer.toString(cid + pid * cores_per_pid);
coreInfo.add(new CoreInfo(absoluteCoreID, physicalId));
coreInfo.add(new CoreInfo(processorId, physicalId));
// Get ready to look for the next core.
processorId = null;
physicalId = null;
coreId = null;
cpuCores = null;
}
}
}
if (processorId != null) {
// This will happen when there is no 'physical id' field
coreInfo.add(new CoreInfo(processorId, "0")); //$NON-NLS-1$
}
} catch (IOException e) {
} finally {
try {