Пример #1
0
  private static IRubyObject interpret(
      ThreadContext context,
      IRubyObject self,
      IRScope scope,
      Visibility visibility,
      RubyModule implClass,
      IRubyObject[] args,
      Block block,
      Block.Type blockType) {
    Instr[] instrs = scope.getInstrsForInterpretation();

    // The base IR may not have been processed yet
    if (instrs == null) instrs = scope.prepareForInterpretation(blockType == Block.Type.LAMBDA);

    int numTempVars = scope.getTemporaryVariableSize();
    Object[] temp = numTempVars > 0 ? new Object[numTempVars] : null;
    int n = instrs.length;
    int ipc = 0;
    Instr instr = null;
    Object exception = null;
    int kwArgHashCount =
        (scope.receivesKeywordArgs() && args[args.length - 1] instanceof RubyHash) ? 1 : 0;
    DynamicScope currDynScope = context.getCurrentScope();

    // Counter tpCount = null;

    // Init profiling this scope
    boolean debug = IRRuntimeHelpers.isDebug();
    boolean profile = IRRuntimeHelpers.inProfileMode();
    Integer scopeVersion = profile ? initProfiling(scope) : 0;

    // Enter the looooop!
    while (ipc < n) {
      instr = instrs[ipc];
      ipc++;
      Operation operation = instr.getOperation();
      if (debug) {
        LOG.info("I: {}", instr);
        interpInstrsCount++;
      } else if (profile) {
        if (operation.modifiesCode()) codeModificationsCount++;
        interpInstrsCount++;
        /*
        Counter cnt = opStats.get(operation);
        if (cnt == null) {
            cnt = new Counter();
            opStats.put(operation, cnt);
        }
        cnt.count++;
        */
      }

      try {
        switch (operation.opClass) {
          case ARG_OP:
            {
              receiveArg(
                  context,
                  instr,
                  operation,
                  args,
                  kwArgHashCount,
                  currDynScope,
                  temp,
                  exception,
                  block);
              break;
            }
          case BRANCH_OP:
            {
              if (operation == Operation.JUMP) {
                ipc = ((JumpInstr) instr).getJumpTarget().getTargetPC();
              } else {
                ipc = instr.interpretAndGetNewIPC(context, currDynScope, self, temp, ipc);
              }
              break;
            }
          case CALL_OP:
            {
              if (profile) updateCallSite(instr, scope, scopeVersion);
              processCall(
                  context, instr, operation, scope, currDynScope, temp, self, block, blockType);
              break;
            }
          case BOOK_KEEPING_OP:
            {
              switch (operation) {
                case PUSH_FRAME:
                  {
                    context.preMethodFrameAndClass(
                        implClass, scope.getName(), self, block, scope.getStaticScope());
                    context.setCurrentVisibility(visibility);
                    break;
                  }
                case PUSH_BINDING:
                  {
                    // SSS NOTE: Method scopes only!
                    //
                    // Blocks are a headache -- so, these instrs. are only added to IRMethods.
                    // Blocks have more complicated logic for pushing a dynamic scope (see
                    // InterpretedIRBlockBody)
                    // Changed by DPR
                    currDynScope =
                        DynamicScope.newDynamicScope(
                            scope.getStaticScope(), context.getCurrentScope().getDepth());
                    context.pushScope(currDynScope);
                    break;
                  }
                case CHECK_ARITY:
                  ((CheckArityInstr) instr).checkArity(context.runtime, args.length);
                  break;
                case POP_FRAME:
                  context.popFrame();
                  context.popRubyClass();
                  break;
                case POP_BINDING:
                  context.popScope();
                  break;
                case THREAD_POLL:
                  if (profile) {
                    // SSS: Not being used currently
                    // tpCount.count++;
                    globalThreadPollCount++;

                    // 20K is arbitrary
                    // Every 20K profile counts, spit out profile stats
                    if (globalThreadPollCount % 20000 == 0) {
                      analyzeProfile();
                      // outputProfileStats();
                    }
                  }
                  context.callThreadPoll();
                  break;
                case LINE_NUM:
                  context.setLine(((LineNumberInstr) instr).lineNumber);
                  break;
                case RECORD_END_BLOCK:
                  ((RecordEndBlockInstr) instr).interpret();
                  break;
              }
              break;
            }
          case OTHER_OP:
            {
              Object result = null;
              switch (operation) {
                  // --------- Return flavored instructions --------
                case BREAK:
                  {
                    BreakInstr bi = (BreakInstr) instr;
                    IRubyObject rv =
                        (IRubyObject)
                            bi.getReturnValue().retrieve(context, self, currDynScope, temp);
                    // This also handles breaks in lambdas -- by converting them to a return
                    return IRRuntimeHelpers.initiateBreak(
                        context, scope, bi.getScopeToReturnTo().getScopeId(), rv, blockType);
                  }
                case RETURN:
                  {
                    return (IRubyObject)
                        retrieveOp(
                            ((ReturnBase) instr).getReturnValue(),
                            context,
                            self,
                            currDynScope,
                            temp);
                  }
                case NONLOCAL_RETURN:
                  {
                    NonlocalReturnInstr ri = (NonlocalReturnInstr) instr;
                    IRubyObject rv =
                        (IRubyObject)
                            retrieveOp(ri.getReturnValue(), context, self, currDynScope, temp);
                    ipc = n;
                    // If not in a lambda, check if this was a non-local return
                    if (!IRRuntimeHelpers.inLambda(blockType)) {
                      IRRuntimeHelpers.initiateNonLocalReturn(
                          context, scope, ri.methodToReturnFrom, rv);
                    }
                    return rv;
                  }

                  // ---------- Common instruction ---------
                case COPY:
                  {
                    CopyInstr c = (CopyInstr) instr;
                    result = retrieveOp(c.getSource(), context, self, currDynScope, temp);
                    setResult(temp, currDynScope, c.getResult(), result);
                    break;
                  }

                case GET_FIELD:
                  {
                    GetFieldInstr gfi = (GetFieldInstr) instr;
                    IRubyObject object =
                        (IRubyObject) gfi.getSource().retrieve(context, self, currDynScope, temp);
                    VariableAccessor a = gfi.getAccessor(object);
                    result = a == null ? null : (IRubyObject) a.get(object);
                    if (result == null) {
                      result = context.nil;
                    }
                    setResult(temp, currDynScope, gfi.getResult(), result);
                    break;
                  }

                case SEARCH_CONST:
                  {
                    SearchConstInstr sci = (SearchConstInstr) instr;
                    result = sci.getCachedConst();
                    if (!sci.isCached(context, result))
                      result = sci.cache(context, currDynScope, self, temp);
                    setResult(temp, currDynScope, sci.getResult(), result);
                    break;
                  }

                  // ---------- All the rest ---------
                default:
                  result = instr.interpret(context, currDynScope, self, temp, block);
                  setResult(temp, currDynScope, instr, result);
                  break;
              }

              break;
            }
        }
      } catch (Throwable t) {
        // Unrescuable:
        //    IRReturnJump, ThreadKill, RubyContinuation, MainExitException, etc.
        //    These cannot be rescued -- only run ensure blocks
        //
        // Others:
        //    IRBreakJump, Ruby exceptions, errors, and other java exceptions.
        //    These can be rescued -- run rescue blocks

        if (debug)
          LOG.info(
              "in scope: "
                  + scope
                  + ", caught Java throwable: "
                  + t
                  + "; excepting instr: "
                  + instr);
        ipc = (t instanceof Unrescuable) ? scope.getEnsurerPC(instr) : scope.getRescuerPC(instr);
        if (debug) LOG.info("ipc for rescuer/ensurer: " + ipc);

        if (ipc == -1) {
          Helpers.throwException((Throwable) t);
        } else {
          exception = t;
        }
      }
    }

    // Control should never get here!
    // SSS FIXME: But looks like BEGIN/END blocks get here -- needs fixing
    return null;
  }
Пример #2
0
  private static void analyzeProfile() {
    versionCount++;

    // if (inlineCount == 2) return;

    if (codeModificationsCount == 0) numCyclesWithNoModifications++;
    else numCyclesWithNoModifications = 0;

    codeModificationsCount = 0;

    if (numCyclesWithNoModifications < 3) return;

    // We are now good to go -- start analyzing the profile

    // System.out.println("-------------------start analysis-----------------------");

    final HashMap<IRScope, Long> scopeCounts = new HashMap<IRScope, Long>();
    final ArrayList<IRCallSite> callSites = new ArrayList<IRCallSite>();
    HashMap<IRCallSite, Long> callSiteCounts = new HashMap<IRCallSite, Long>();
    // System.out.println("# call sites: " + callProfile.keySet().size());
    long total = 0;
    for (Long id : callProfile.keySet()) {
      Long c;

      CallSiteProfile csp = callProfile.get(id);
      IRCallSite cs = csp.cs;

      if (cs.v != scopeVersionMap.get(cs.s).intValue()) {
        // System.out.println("Skipping callsite: <" + cs.s + "," + cs.v + "> with compiled version:
        // " + scopeVersionMap.get(cs.s));
        continue;
      }

      Set<IRScope> calledScopes = csp.counters.keySet();
      cs.count = 0;
      for (IRScope s : calledScopes) {
        c = scopeCounts.get(s);
        if (c == null) {
          c = new Long(0);
          scopeCounts.put(s, c);
        }

        long x = csp.counters.get(s).count;
        c += x;
        cs.count += x;
      }

      CallBase call = cs.call;
      if (calledScopes.size() == 1 && !call.inliningBlocked()) {
        CallSite runtimeCS = call.getCallSite();
        if (runtimeCS != null && (runtimeCS instanceof CachingCallSite)) {
          CachingCallSite ccs = (CachingCallSite) runtimeCS;
          CacheEntry ce = ccs.getCache();

          if (!(ce.method instanceof InterpretedIRMethod)) {
            // System.out.println("NOT IR-M!");
            continue;
          } else {
            callSites.add(cs);
            cs.tgtM = (InterpretedIRMethod) ce.method;
          }
        }
      }

      total += cs.count;
    }

    Collections.sort(
        callSites,
        new java.util.Comparator<IRCallSite>() {
          @Override
          public int compare(IRCallSite a, IRCallSite b) {
            if (a.count == b.count) return 0;
            return (a.count < b.count) ? 1 : -1;
          }
        });

    // Find top N call sites
    double freq = 0.0;
    int i = 0;
    boolean noInlining = true;
    Set<IRScope> inlinedScopes = new HashSet<IRScope>();
    for (IRCallSite ircs : callSites) {
      double contrib = (ircs.count * 100.0) / total;

      // 1% is arbitrary
      if (contrib < 1.0) break;

      i++;
      freq += contrib;

      // This check is arbitrary
      if (i == 100 || freq > 99.0) break;

      // System.out.println("Considering: " + ircs.call + " with id: " + ircs.call.callSiteId +
      // " in scope " + ircs.s + " with count " + ircs.count + "; contrib " + contrib + "; freq: " +
      // freq);

      // Now inline here!
      CallBase call = ircs.call;

      IRScope hs = ircs.s;
      boolean isHotClosure = hs instanceof IRClosure;
      IRScope hc = isHotClosure ? hs : null;
      hs = isHotClosure ? hs.getLexicalParent() : hs;

      IRScope tgtMethod = ircs.tgtM.getIRMethod();

      Instr[] instrs = tgtMethod.getInstrsForInterpretation();
      // Dont inline large methods -- 500 is arbitrary
      // Can be null if a previously inlined method hasn't been rebuilt
      if ((instrs == null) || instrs.length > 500) {
        // if (instrs == null) System.out.println("no instrs!");
        // else System.out.println("large method with " + instrs.length + " instrs. skipping!");
        continue;
      }

      RubyModule implClass = ircs.tgtM.getImplementationClass();
      int classToken = implClass.getGeneration();
      String n = tgtMethod.getName();
      boolean inlineCall = true;
      if (isHotClosure) {
        Operand clArg = call.getClosureArg(null);
        inlineCall =
            (clArg instanceof WrappedIRClosure) && (((WrappedIRClosure) clArg).getClosure() == hc);
      }

      if (inlineCall) {
        noInlining = false;
        long start = new java.util.Date().getTime();
        hs.inlineMethod(tgtMethod, implClass, classToken, null, call);
        inlinedScopes.add(hs);
        long end = new java.util.Date().getTime();
        // System.out.println("Inlined " + tgtMethod + " in " + hs +
        //     " @ instr " + call + " in time (ms): "
        //     + (end-start) + " # instrs: " + instrs.length);

        inlineCount++;
      } else {
        // System.out.println("--no inlining--");
      }
    }

    for (IRScope x : inlinedScopes) {
      // update version count for 'hs'
      scopeVersionMap.put(x, versionCount);
      // System.out.println("Updating version of " + x + " to " + versionCount);
      // System.out.println("--- pre-inline-instrs ---");
      // System.out.println(x.getCFG().toStringInstrs());
      // System.out.println("--- post-inline-instrs ---");
      // System.out.println(x.getCFG().toStringInstrs());
    }

    // reset
    codeModificationsCount = 0;
    callProfile = new HashMap<Long, CallSiteProfile>();

    // Every 1M thread polls, discard stats by reallocating the thread-poll count map
    if (globalThreadPollCount % 1000000 == 0) {
      globalThreadPollCount = 0;
    }
  }