Add skeleton json support to visualbench

tools/VisualBench/VisualBench.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  *
  */
 
 #include "VisualBench.h"
 
@@ skipping 18 matching lines @@
 
 DEFINE_int32(gpuFrameLag, 5, "Overestimate of maximum number of frames GPU allows to lag.");
 DEFINE_int32(samples, 10, "Number of times to time each skp.");
 DEFINE_int32(frames, 5, "Number of frames of each skp to render per sample.");
 DEFINE_double(flushMs, 20, "Target flush time in millseconds.");
 DEFINE_double(loopMs, 5, "Target loop time in millseconds.");
 DEFINE_int32(msaa, 0, "Number of msaa samples.");
 DEFINE_bool2(fullscreen, f, true, "Run fullscreen.");
 DEFINE_bool2(verbose, v, false, "enable verbose output from the test driver.");
 DEFINE_string(key, "", "");  // dummy to enable gm tests that have platform-specific names
+DEFINE_string(outResultsFile, "", "If given, write results here as JSON.");
+DEFINE_string(properties, "",
+              "Space-separated key/value pairs to add to JSON identifying this run.");
 
 static SkString humanize(double ms) {
     if (FLAGS_verbose) {
         return SkStringPrintf("%llu", (uint64_t)(ms*1e6));
     }
     return HumanizeMs(ms);
 }
 
 #define HUMANIZE(time) humanize(time).c_str()
 
 VisualBench::VisualBench(void* hwnd, int argc, char** argv)
     : INHERITED(hwnd)
     , fCurrentSample(0)
     , fCurrentFrame(0)
     , fFlushes(1)
     , fLoops(1)
     , fState(kPreWarmLoops_State)
-    , fBenchmark(NULL) {
+    , fBenchmark(NULL)
+    , fResults(SkNEW(ResultsWriter)) {
     SkCommandLineFlags::Parse(argc, argv);
 
     this->setTitle();
     this->setupBackend();
 
     fBenchmarkStream.reset(SkNEW(VisualBenchmarkStream));
 
     // Print header
     SkDebugf("curr/maxrss\tloops\tflushes\tmin\tmedian\tmean\tmax\tstddev\tbench\n");
+
+    // setup json logging if required
+    if (!FLAGS_outResultsFile.isEmpty()) {
+        fResults.reset(SkNEW(NanoJSONResultsWriter(FLAGS_outResultsFile[0])));
+    }
+
+    if (1 == FLAGS_properties.count() % 2) {
+        SkDebugf("ERROR: --properties must be passed with an even number of arguments.\n");
+    } else {
+        for (int i = 1; i < FLAGS_properties.count(); i += 2) {
+            fResults->property(FLAGS_properties[i - 1], FLAGS_properties[i]);
+        }
+    }
 }
 
 VisualBench::~VisualBench() {
     INHERITED::detach();
 }
 
 void VisualBench::setTitle() {
     SkString title("VisualBench");
     INHERITED::setTitle(title.c_str());
 }
@@ skipping 53 matching lines @@
     for (int flush = 0; flush < fFlushes; flush++) {
         fBenchmark->draw(fLoops, canvas);
         canvas->flush();
     }
     INHERITED::present();
 }
 
 void VisualBench::printStats() {
     const SkTArray<double>& measurements = fRecords.back().fMeasurements;
     const char* shortName = fBenchmark->getUniqueName();
+
+    // update log
+    // Note: We currently log only the minimum.  It would be interesting to log more information
+    SkString configName;
+    if (FLAGS_msaa > 0) {
+        configName.appendf("msaa_%d", FLAGS_msaa);
+    } else {
+        configName.appendf("gpu");
+    }
+    fResults->config(configName.c_str());
+    fResults->configOption("name", fBenchmark->getUniqueName());
+    SkASSERT(measurements.count());
+    Stats stats(measurements);
+    fResults->metric("min_ms",    stats.min);
+
+    // Print output
     if (FLAGS_verbose) {
         for (int i = 0; i < measurements.count(); i++) {
             SkDebugf("%s  ", HUMANIZE(measurements[i]));
         }
         SkDebugf("%s\n", shortName);
     } else {
-        SkASSERT(measurements.count());
-        Stats stats(measurements);
         const double stdDevPercent = 100 * sqrt(stats.var) / stats.mean;
         SkDebugf("%4d/%-4dMB\t%d\t%d\t%s\t%s\t%s\t%s\t%.0f%%\t%s\n",
                  sk_tools::getCurrResidentSetSizeMB(),
                  sk_tools::getMaxResidentSetSizeMB(),
                  fLoops,
                  fFlushes,
                  HUMANIZE(stats.min),
                  HUMANIZE(stats.median),
                  HUMANIZE(stats.mean),
                  HUMANIZE(stats.max),
                  stdDevPercent,
                  shortName);
     }
 }
 
 bool VisualBench::advanceRecordIfNecessary(SkCanvas* canvas) {
     if (fBenchmark) {
         return true;
     }
 
     fBenchmark.reset(fBenchmarkStream->next());
     if (!fBenchmark) {
         return false;
     }
 
     canvas->clear(0xffffffff);
     fBenchmark->preDraw();
     fRecords.push_back();
+
+    // Log bench name
+    fResults->bench(fBenchmark->getUniqueName(), fBenchmark->getSize().fX,
+                    fBenchmark->getSize().fY);
     return true;
 }
 
 inline void VisualBench::nextState(State nextState) {
     fState = nextState;
 }
 
 void VisualBench::perCanvasPreDraw(SkCanvas* canvas, State nextState) {
     fBenchmark->perCanvasPreDraw(canvas);
     fCurrentFrame = 0;
@@ skipping 128 matching lines @@
 
 void application_term() {
     SkEvent::Term();
     SkGraphics::Term();
 }
 
 SkOSWindow* create_sk_window(void* hwnd, int argc, char** argv) {
     return new VisualBench(hwnd, argc, argv);
 }