public void objectIsToBeEvicted(CacheEvent e) {
// modify the page table entry
CacheEntry cacheEntry = e.getCache().getEntry(e.getIndex());
if (cacheEntry == null) {
// prev removed by another thread(page aging , PFF)
Logger.log("SYNC meth put DMPTM ");
return;
}
int vpnNBits =
ConfigHolder.generalCfg.getVirtualAddrNBits()
- ConfigHolder.cacheCfgs[ConfigHolder.numberCaches].getBlockSizeNBits(
cacheEntry.getState());
// pid not needed
int[] offsetsLength =
((DirectMappedPageTableConfig) ConfigHolder.pageTableCfg.getAddCfg()).getOffsetsLength();
int vPN = ((ExtCacheEntry) e.getCache().getEntry(e.getIndex())).getValue();
if (tlbModel.getCfg().isEnabled()) {
tlbModel.getCache().removeEntry(e.getCache().getEntry(e.getIndex()));
}
int[] offsets = getOffsets((int) (vPN % Math.pow(2, vpnNBits)), cacheEntry.getState());
int lastNumber = 0;
AbstractTableModel model;
DirectPageDirectoryEntry entry;
int n;
for (int i = 0; i < offsetsLength.length + 1; i++) {
n = (i == 0 ? (int) (vPN / Math.pow(2, vpnNBits)) : offsets[i - 1]);
model = tables[i].get(lastNumber);
entry = ((DirectPageDirectoryModel) model).readEntry(n);
if (entry == null) {
System.out.println("ENTRY NULL page must be in page table entry");
} else {
if (i == offsetsLength.length) {
((DirectPageTableModel) model).setEntryInMemory(n, false);
} else {
lastNumber = entry.getPageNumber();
}
}
}
}
/**
* @param indexPageTable the index in the table array of level startLevel
* @param startLevel
* @param pid
* @param vPN
* @param instrType
* @param ptVPNs
* @return
*/
private int getPhysicalPageNumberFromPageTD(
int indexPageTable,
int startLevel,
int pid,
int vPN,
short instrType,
Stack<Integer> ptVPNs) {
int[] offsetsLength =
((DirectMappedPageTableConfig) ConfigHolder.pageTableCfg.getAddCfg()).getOffsetsLength();
int vpnNBits =
ConfigHolder.generalCfg.getVirtualAddrNBits()
- ConfigHolder.cacheCfgs[ConfigHolder.numberCaches].getBlockSizeNBits(instrType);
int lastNumber = indexPageTable;
DirectPageDirectoryModel model;
DirectPageDirectoryEntry entry;
int[] offsets = getOffsets((int) (vPN % Math.pow(2, vpnNBits)), instrType);
/*System.out.println("getPhysicalPageNumberFromPageTD instrType=" + String.valueOf(instrType) + ", offsets:");
for(int i = 0; i < offsets.length; i++){
System.out.print(String.valueOf(offsets[i]) + " ");
}
System.out.println("");
*/
int n;
for (int i = startLevel; i < offsetsLength.length + 1; i++) {
n = (i == 0 ? (int) (vPN / Math.pow(2, vpnNBits)) : offsets[i - 1]);
if (lastNumber < 0) {
System.out.println("Level " + i);
}
model = tables[i].get(lastNumber);
entry = model.readEntry(n);
if (entry == null) {
model.newEntry(n);
if (i == offsetsLength.length) {
// read first time from disk
lastNumber = getPageFromDisk(pid, -1, instrType, vPN);
// System.out.println("getPhysicalPageNumberFromPageTD instrType=" +
// String.valueOf(instrType) + ", lastNumber1=" + String.valueOf(lastNumber));
// put the key , value in a swap file
((DirectPageTableModel) model).setEntry(n, lastNumber, true);
} else {
lastNumber = tables[i + 1].size();
// System.out.println("getPhysicalPageNumberFromPageTD instrType=" +
// String.valueOf(instrType) + ", lastNumber3=" + String.valueOf(lastNumber));
model.setEntryPageNumber(n, lastNumber);
createTable(i + 1);
}
} else {
if (i == offsetsLength.length) {
// check if it is in a swap file
if (!((PageTableEntry) entry).isInMemory()) {
// the page number is an offset of a swap file, get from
// there
lastNumber = getPageFromDisk(pid, -1, instrType, vPN);
// System.out.println("getPhysicalPageNumberFromPageTD instrType=" +
// String.valueOf(instrType) + ", lastNumber2=" + String.valueOf(lastNumber));
((DirectPageTableModel) model).setEntry(n, lastNumber, true);
} else {
lastNumber = entry.getPageNumber();
// System.out.println("getPhysicalPageNumberFromPageTD instrType=" +
// String.valueOf(instrType) + ", lastNumber5=" + String.valueOf(lastNumber));
}
} else {
lastNumber = entry.getPageNumber();
// System.out.println("getPhysicalPageNumberFromPageTD instrType=" +
// String.valueOf(instrType) + ", lastNumber4=" + String.valueOf(lastNumber));
}
}
if (ptVPNs != null && i > 0) {
tlbModel
.getCache()
.put(new ExtCacheEntry(pid, ptVPNs.pop().intValue(), instrType, lastNumber));
}
}
return lastNumber;
}
