115 lines
3.2 KiB
C
115 lines
3.2 KiB
C
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/*
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* Copyright 2013 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* Classes for writing out bench results in various formats.
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*/
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#ifndef SkResultsWriter_DEFINED
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#define SkResultsWriter_DEFINED
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#include "include/core/SkString.h"
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#include "include/core/SkTypes.h"
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#include "src/core/SkOSFile.h"
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#include "src/utils/SkJSONWriter.h"
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/**
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NanoJSONResultsWriter helps nanobench writes the test results out in the following format:
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{
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"key": {
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"arch": "Arm7",
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"gpu": "SGX540",
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"os": "Android",
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"model": "GalaxyNexus",
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}
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"gitHash": "d1830323662ae8ae06908b97f15180fd25808894",
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"build_number": "1234",
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"results" : {
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"Xfermode_Luminosity_640_480" : {
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"8888" : {
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"median_ms" : 143.188128906250,
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"min_ms" : 143.835957031250,
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...
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},
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...
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*/
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class NanoJSONResultsWriter : public SkJSONWriter {
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public:
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NanoJSONResultsWriter(SkWStream* stream, Mode mode) : SkJSONWriter(stream, mode) {}
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void beginBench(const char* name, int32_t x, int32_t y) {
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SkString id = SkStringPrintf("%s_%d_%d", name, x, y);
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this->beginObject(id.c_str());
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}
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void endBench() { this->endObject(); }
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void appendMetric(const char* name, double value) {
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// Don't record if nan, or -nan.
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if (!sk_double_isnan(value)) {
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this->appendDoubleDigits(name, value, 16);
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}
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}
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};
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/**
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NanoFILEAppendAndCloseStream: re-open the file, append the data, then close on every write() call.
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The purpose of this class is to not keep the file handle open between JSON flushes. SkJSONWriter
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uses a 32k in-memory cache already, so it only flushes occasionally and is well equipped for a
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steam like this.
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See: https://b.corp.google.com/issues/143074513
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*/
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class NanoFILEAppendAndCloseStream : public SkWStream {
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public:
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NanoFILEAppendAndCloseStream(const char* filePath) : fFilePath(filePath) {
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// Open the file as "write" to ensure it exists and clear any contents before we begin
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// appending.
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FILE* file = sk_fopen(fFilePath.c_str(), kWrite_SkFILE_Flag);
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if (!file) {
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SkDebugf("Failed to open file %s for write.\n", fFilePath.c_str());
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fFilePath.reset();
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return;
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}
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sk_fclose(file);
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}
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size_t bytesWritten() const override { return fBytesWritten; }
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bool write(const void* buffer, size_t size) override {
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if (fFilePath.isEmpty()) {
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return false;
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}
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FILE* file = sk_fopen(fFilePath.c_str(), kAppend_SkFILE_Flag);
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if (!file) {
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SkDebugf("Failed to open file %s for append.\n", fFilePath.c_str());
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return false;
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}
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size_t bytesWritten = sk_fwrite(buffer, size, file);
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fBytesWritten += bytesWritten;
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sk_fclose(file);
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if (bytesWritten != size) {
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SkDebugf("NanoFILEAppendAndCloseStream failed writing %d bytes (wrote %d instead)\n",
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size, bytesWritten);
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return false;
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}
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return true;
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}
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void flush() override {}
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private:
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SkString fFilePath;
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size_t fBytesWritten = 0;
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};
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#endif
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