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484 lines
20 KiB
C++
484 lines
20 KiB
C++
//===-- xray-graph-diff.cpp: XRay Function Call Graph Renderer ------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// Generate a DOT file to represent the function call graph encountered in
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// the trace.
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//
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//===----------------------------------------------------------------------===//
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#include <cassert>
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#include <cmath>
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#include <limits>
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#include <string>
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#include "xray-graph-diff.h"
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#include "xray-graph.h"
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#include "xray-registry.h"
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#include "xray-color-helper.h"
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#include "llvm/ADT/iterator_range.h"
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#include "llvm/Support/FormatVariadic.h"
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#include "llvm/XRay/Trace.h"
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using namespace llvm;
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using namespace xray;
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static cl::SubCommand GraphDiff("graph-diff",
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"Generate diff of function-call graphs");
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static cl::opt<std::string> GraphDiffInput1(cl::Positional,
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cl::desc("<xray log file 1>"),
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cl::Required, cl::sub(GraphDiff));
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static cl::opt<std::string> GraphDiffInput2(cl::Positional,
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cl::desc("<xray log file 2>"),
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cl::Required, cl::sub(GraphDiff));
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static cl::opt<bool>
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GraphDiffKeepGoing("keep-going",
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cl::desc("Keep going on errors encountered"),
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cl::sub(GraphDiff), cl::init(false));
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static cl::alias GraphDiffKeepGoingA("k", cl::aliasopt(GraphDiffKeepGoing),
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cl::desc("Alias for -keep-going"),
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cl::sub(GraphDiff));
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static cl::opt<bool>
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GraphDiffKeepGoing1("keep-going-1",
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cl::desc("Keep going on errors encountered in trace 1"),
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cl::sub(GraphDiff), cl::init(false));
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static cl::alias GraphDiffKeepGoing1A("k1", cl::aliasopt(GraphDiffKeepGoing1),
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cl::desc("Alias for -keep-going-1"),
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cl::sub(GraphDiff));
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static cl::opt<bool>
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GraphDiffKeepGoing2("keep-going-2",
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cl::desc("Keep going on errors encountered in trace 2"),
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cl::sub(GraphDiff), cl::init(false));
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static cl::alias GraphDiffKeepGoing2A("k2", cl::aliasopt(GraphDiffKeepGoing2),
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cl::desc("Alias for -keep-going-2"),
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cl::sub(GraphDiff));
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static cl::opt<std::string>
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GraphDiffInstrMap("instr-map",
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cl::desc("binary with the instrumentation map, or "
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"a separate instrumentation map for graph"),
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cl::value_desc("binary with xray_instr_map or yaml"),
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cl::sub(GraphDiff), cl::init(""));
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static cl::alias GraphDiffInstrMapA("m", cl::aliasopt(GraphDiffInstrMap),
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cl::desc("Alias for -instr-map"),
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cl::sub(GraphDiff));
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static cl::opt<std::string>
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GraphDiffInstrMap1("instr-map-1",
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cl::desc("binary with the instrumentation map, or "
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"a separate instrumentation map for graph 1"),
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cl::value_desc("binary with xray_instr_map or yaml"),
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cl::sub(GraphDiff), cl::init(""));
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static cl::alias GraphDiffInstrMap1A("m1", cl::aliasopt(GraphDiffInstrMap1),
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cl::desc("Alias for -instr-map-1"),
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cl::sub(GraphDiff));
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static cl::opt<std::string>
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GraphDiffInstrMap2("instr-map-2",
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cl::desc("binary with the instrumentation map, or "
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"a separate instrumentation map for graph 2"),
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cl::value_desc("binary with xray_instr_map or yaml"),
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cl::sub(GraphDiff), cl::init(""));
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static cl::alias GraphDiffInstrMap2A("m2", cl::aliasopt(GraphDiffInstrMap2),
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cl::desc("Alias for -instr-map-2"),
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cl::sub(GraphDiff));
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static cl::opt<bool> GraphDiffDeduceSiblingCalls(
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"deduce-sibling-calls",
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cl::desc("Deduce sibling calls when unrolling function call stacks"),
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cl::sub(GraphDiff), cl::init(false));
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static cl::alias
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GraphDiffDeduceSiblingCallsA("d", cl::aliasopt(GraphDiffDeduceSiblingCalls),
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cl::desc("Alias for -deduce-sibling-calls"),
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cl::sub(GraphDiff));
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static cl::opt<bool> GraphDiffDeduceSiblingCalls1(
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"deduce-sibling-calls-1",
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cl::desc("Deduce sibling calls when unrolling function call stacks"),
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cl::sub(GraphDiff), cl::init(false));
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static cl::alias GraphDiffDeduceSiblingCalls1A(
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"d1", cl::aliasopt(GraphDiffDeduceSiblingCalls1),
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cl::desc("Alias for -deduce-sibling-calls-1"), cl::sub(GraphDiff));
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static cl::opt<bool> GraphDiffDeduceSiblingCalls2(
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"deduce-sibling-calls-2",
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cl::desc("Deduce sibling calls when unrolling function call stacks"),
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cl::sub(GraphDiff), cl::init(false));
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static cl::alias GraphDiffDeduceSiblingCalls2A(
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"d2", cl::aliasopt(GraphDiffDeduceSiblingCalls2),
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cl::desc("Alias for -deduce-sibling-calls-2"), cl::sub(GraphDiff));
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static cl::opt<GraphRenderer::StatType> GraphDiffEdgeLabel(
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"edge-label", cl::desc("Output graphs with edges labeled with this field"),
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cl::value_desc("field"), cl::sub(GraphDiff),
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cl::init(GraphRenderer::StatType::NONE),
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cl::values(clEnumValN(GraphRenderer::StatType::NONE, "none",
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"Do not label Edges"),
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clEnumValN(GraphRenderer::StatType::COUNT, "count",
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"function call counts"),
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clEnumValN(GraphRenderer::StatType::MIN, "min",
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"minimum function durations"),
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clEnumValN(GraphRenderer::StatType::MED, "med",
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"median function durations"),
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clEnumValN(GraphRenderer::StatType::PCT90, "90p",
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"90th percentile durations"),
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clEnumValN(GraphRenderer::StatType::PCT99, "99p",
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"99th percentile durations"),
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clEnumValN(GraphRenderer::StatType::MAX, "max",
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"maximum function durations"),
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clEnumValN(GraphRenderer::StatType::SUM, "sum",
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"sum of call durations")));
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static cl::alias GraphDiffEdgeLabelA("e", cl::aliasopt(GraphDiffEdgeLabel),
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cl::desc("Alias for -edge-label"),
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cl::sub(GraphDiff));
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static cl::opt<GraphRenderer::StatType> GraphDiffEdgeColor(
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"edge-color", cl::desc("Output graphs with edges colored by this field"),
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cl::value_desc("field"), cl::sub(GraphDiff),
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cl::init(GraphRenderer::StatType::NONE),
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cl::values(clEnumValN(GraphRenderer::StatType::NONE, "none",
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"Do not color Edges"),
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clEnumValN(GraphRenderer::StatType::COUNT, "count",
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"function call counts"),
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clEnumValN(GraphRenderer::StatType::MIN, "min",
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"minimum function durations"),
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clEnumValN(GraphRenderer::StatType::MED, "med",
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"median function durations"),
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clEnumValN(GraphRenderer::StatType::PCT90, "90p",
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"90th percentile durations"),
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clEnumValN(GraphRenderer::StatType::PCT99, "99p",
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"99th percentile durations"),
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clEnumValN(GraphRenderer::StatType::MAX, "max",
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"maximum function durations"),
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clEnumValN(GraphRenderer::StatType::SUM, "sum",
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"sum of call durations")));
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static cl::alias GraphDiffEdgeColorA("c", cl::aliasopt(GraphDiffEdgeColor),
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cl::desc("Alias for -edge-color"),
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cl::sub(GraphDiff));
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static cl::opt<GraphRenderer::StatType> GraphDiffVertexLabel(
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"vertex-label",
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cl::desc("Output graphs with vertices labeled with this field"),
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cl::value_desc("field"), cl::sub(GraphDiff),
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cl::init(GraphRenderer::StatType::NONE),
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cl::values(clEnumValN(GraphRenderer::StatType::NONE, "none",
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"Do not label Vertices"),
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clEnumValN(GraphRenderer::StatType::COUNT, "count",
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"function call counts"),
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clEnumValN(GraphRenderer::StatType::MIN, "min",
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"minimum function durations"),
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clEnumValN(GraphRenderer::StatType::MED, "med",
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"median function durations"),
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clEnumValN(GraphRenderer::StatType::PCT90, "90p",
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"90th percentile durations"),
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clEnumValN(GraphRenderer::StatType::PCT99, "99p",
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"99th percentile durations"),
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clEnumValN(GraphRenderer::StatType::MAX, "max",
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"maximum function durations"),
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clEnumValN(GraphRenderer::StatType::SUM, "sum",
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"sum of call durations")));
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static cl::alias GraphDiffVertexLabelA("v", cl::aliasopt(GraphDiffVertexLabel),
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cl::desc("Alias for -vertex-label"),
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cl::sub(GraphDiff));
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static cl::opt<GraphRenderer::StatType> GraphDiffVertexColor(
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"vertex-color",
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cl::desc("Output graphs with vertices colored by this field"),
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cl::value_desc("field"), cl::sub(GraphDiff),
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cl::init(GraphRenderer::StatType::NONE),
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cl::values(clEnumValN(GraphRenderer::StatType::NONE, "none",
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"Do not color Vertices"),
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clEnumValN(GraphRenderer::StatType::COUNT, "count",
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"function call counts"),
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clEnumValN(GraphRenderer::StatType::MIN, "min",
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"minimum function durations"),
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clEnumValN(GraphRenderer::StatType::MED, "med",
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"median function durations"),
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clEnumValN(GraphRenderer::StatType::PCT90, "90p",
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"90th percentile durations"),
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clEnumValN(GraphRenderer::StatType::PCT99, "99p",
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"99th percentile durations"),
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clEnumValN(GraphRenderer::StatType::MAX, "max",
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"maximum function durations"),
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clEnumValN(GraphRenderer::StatType::SUM, "sum",
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"sum of call durations")));
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static cl::alias GraphDiffVertexColorA("b", cl::aliasopt(GraphDiffVertexColor),
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cl::desc("Alias for -vertex-color"),
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cl::sub(GraphDiff));
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static cl::opt<int> GraphDiffVertexLabelTrunc(
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"vertex-label-trun", cl::desc("What length to truncate vertex labels to "),
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cl::sub(GraphDiff), cl::init(40));
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static cl::alias
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GraphDiffVertexLabelTrunc1("t", cl::aliasopt(GraphDiffVertexLabelTrunc),
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cl::desc("Alias for -vertex-label-trun"),
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cl::sub(GraphDiff));
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static cl::opt<std::string>
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GraphDiffOutput("output", cl::value_desc("Output file"), cl::init("-"),
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cl::desc("output file; use '-' for stdout"),
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cl::sub(GraphDiff));
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static cl::alias GraphDiffOutputA("o", cl::aliasopt(GraphDiffOutput),
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cl::desc("Alias for -output"),
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cl::sub(GraphDiff));
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Expected<GraphDiffRenderer> GraphDiffRenderer::Factory::getGraphDiffRenderer() {
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GraphDiffRenderer R;
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for (int i = 0; i < N; ++i) {
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const auto &G = this->G[i].get();
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for (const auto &V : G.vertices()) {
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const auto &VAttr = V.second;
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R.G[VAttr.SymbolName].CorrVertexPtr[i] = &V;
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}
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for (const auto &E : G.edges()) {
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auto &EdgeTailID = E.first.first;
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auto &EdgeHeadID = E.first.second;
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auto EdgeTailAttrOrErr = G.at(EdgeTailID);
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auto EdgeHeadAttrOrErr = G.at(EdgeHeadID);
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if (!EdgeTailAttrOrErr)
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return EdgeTailAttrOrErr.takeError();
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if (!EdgeHeadAttrOrErr)
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return EdgeHeadAttrOrErr.takeError();
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GraphT::EdgeIdentifier ID{EdgeTailAttrOrErr->SymbolName,
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EdgeHeadAttrOrErr->SymbolName};
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R.G[ID].CorrEdgePtr[i] = &E;
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}
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}
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return R;
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}
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// Returns the Relative change With respect to LeftStat between LeftStat
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// and RightStat.
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static double statRelDiff(const GraphDiffRenderer::TimeStat &LeftStat,
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const GraphDiffRenderer::TimeStat &RightStat,
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GraphDiffRenderer::StatType T) {
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double LeftAttr = LeftStat.getDouble(T);
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double RightAttr = RightStat.getDouble(T);
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return RightAttr / LeftAttr - 1.0;
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}
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static std::string getColor(const GraphDiffRenderer::GraphT::EdgeValueType &E,
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const GraphDiffRenderer::GraphT &G, ColorHelper H,
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GraphDiffRenderer::StatType T) {
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auto &EdgeAttr = E.second;
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if (EdgeAttr.CorrEdgePtr[0] == nullptr)
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return H.getColorString(2.0); // A number greater than 1.0
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if (EdgeAttr.CorrEdgePtr[1] == nullptr)
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return H.getColorString(-2.0); // A number less than -1.0
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if (T == GraphDiffRenderer::StatType::NONE)
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return H.getDefaultColorString();
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const auto &LeftStat = EdgeAttr.CorrEdgePtr[0]->second.S;
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const auto &RightStat = EdgeAttr.CorrEdgePtr[1]->second.S;
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double RelDiff = statRelDiff(LeftStat, RightStat, T);
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double CappedRelDiff = std::min(1.0, std::max(-1.0, RelDiff));
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return H.getColorString(CappedRelDiff);
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}
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static std::string getColor(const GraphDiffRenderer::GraphT::VertexValueType &V,
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const GraphDiffRenderer::GraphT &G, ColorHelper H,
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GraphDiffRenderer::StatType T) {
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auto &VertexAttr = V.second;
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if (VertexAttr.CorrVertexPtr[0] == nullptr)
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return H.getColorString(2.0); // A number greater than 1.0
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if (VertexAttr.CorrVertexPtr[1] == nullptr)
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return H.getColorString(-2.0); // A number less than -1.0
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if (T == GraphDiffRenderer::StatType::NONE)
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return H.getDefaultColorString();
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const auto &LeftStat = VertexAttr.CorrVertexPtr[0]->second.S;
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const auto &RightStat = VertexAttr.CorrVertexPtr[1]->second.S;
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double RelDiff = statRelDiff(LeftStat, RightStat, T);
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double CappedRelDiff = std::min(1.0, std::max(-1.0, RelDiff));
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return H.getColorString(CappedRelDiff);
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}
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static Twine truncateString(const StringRef &S, size_t n) {
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return (S.size() > n) ? Twine(S.substr(0, n)) + "..." : Twine(S);
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}
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template <typename T> static bool containsNullptr(const T &Collection) {
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for (const auto &E : Collection)
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if (E == nullptr)
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return true;
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return false;
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}
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static std::string getLabel(const GraphDiffRenderer::GraphT::EdgeValueType &E,
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GraphDiffRenderer::StatType EL) {
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auto &EdgeAttr = E.second;
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switch (EL) {
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case GraphDiffRenderer::StatType::NONE:
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return "";
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default:
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if (containsNullptr(EdgeAttr.CorrEdgePtr))
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return "";
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const auto &LeftStat = EdgeAttr.CorrEdgePtr[0]->second.S;
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const auto &RightStat = EdgeAttr.CorrEdgePtr[1]->second.S;
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double RelDiff = statRelDiff(LeftStat, RightStat, EL);
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return formatv(R"({0:P})", RelDiff);
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}
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}
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static std::string getLabel(const GraphDiffRenderer::GraphT::VertexValueType &V,
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GraphDiffRenderer::StatType VL, int TrunLen) {
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const auto &VertexId = V.first;
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const auto &VertexAttr = V.second;
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switch (VL) {
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case GraphDiffRenderer::StatType::NONE:
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return formatv(R"({0})", truncateString(VertexId, TrunLen).str());
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default:
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if (containsNullptr(VertexAttr.CorrVertexPtr))
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return formatv(R"({0})", truncateString(VertexId, TrunLen).str());
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const auto &LeftStat = VertexAttr.CorrVertexPtr[0]->second.S;
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const auto &RightStat = VertexAttr.CorrVertexPtr[1]->second.S;
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double RelDiff = statRelDiff(LeftStat, RightStat, VL);
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return formatv(R"({{{0}|{1:P}})", truncateString(VertexId, TrunLen).str(),
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RelDiff);
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}
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}
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static double getLineWidth(const GraphDiffRenderer::GraphT::EdgeValueType &E,
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GraphDiffRenderer::StatType EL) {
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auto &EdgeAttr = E.second;
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switch (EL) {
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case GraphDiffRenderer::StatType::NONE:
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return 1.0;
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default:
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if (containsNullptr(EdgeAttr.CorrEdgePtr))
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return 1.0;
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const auto &LeftStat = EdgeAttr.CorrEdgePtr[0]->second.S;
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const auto &RightStat = EdgeAttr.CorrEdgePtr[1]->second.S;
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double RelDiff = statRelDiff(LeftStat, RightStat, EL);
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return (RelDiff > 1.0) ? RelDiff : 1.0;
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}
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}
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void GraphDiffRenderer::exportGraphAsDOT(raw_ostream &OS, StatType EdgeLabel,
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StatType EdgeColor,
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StatType VertexLabel,
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StatType VertexColor, int TruncLen) {
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// Get numbering of vertices for dot output.
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StringMap<int32_t> VertexNo;
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int i = 0;
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for (const auto &V : G.vertices()) {
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VertexNo[V.first] = i++;
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}
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ColorHelper H(ColorHelper::DivergingScheme::PiYG);
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OS << "digraph xrayDiff {\n";
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if (VertexLabel != StatType::NONE)
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OS << "node [shape=record]\n";
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for (const auto &E : G.edges()) {
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const auto &HeadId = E.first.first;
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const auto &TailId = E.first.second;
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OS << formatv(R"(F{0} -> F{1} [tooltip="{2} -> {3}" label="{4}" )"
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R"(color="{5}" labelfontcolor="{5}" penwidth={6}])"
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"\n",
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VertexNo[HeadId], VertexNo[TailId],
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(HeadId.equals("")) ? static_cast<StringRef>("F0") : HeadId,
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TailId, getLabel(E, EdgeLabel), getColor(E, G, H, EdgeColor),
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getLineWidth(E, EdgeColor));
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}
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for (const auto &V : G.vertices()) {
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const auto &VertexId = V.first;
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if (VertexId.equals("")) {
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OS << formatv(R"(F{0} [label="F0"])"
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"\n",
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VertexNo[VertexId]);
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continue;
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}
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OS << formatv(R"(F{0} [label="{1}" color="{2}"])"
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"\n",
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VertexNo[VertexId], getLabel(V, VertexLabel, TruncLen),
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getColor(V, G, H, VertexColor));
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}
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OS << "}\n";
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}
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template <typename T> static T &ifSpecified(T &A, cl::alias &AA, T &B) {
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if (A.getPosition() == 0 && AA.getPosition() == 0)
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return B;
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return A;
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}
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static CommandRegistration Unused(&GraphDiff, []() -> Error {
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std::array<GraphRenderer::Factory, 2> Factories{
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{{ifSpecified(GraphDiffKeepGoing1, GraphDiffKeepGoing1A,
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GraphDiffKeepGoing),
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ifSpecified(GraphDiffDeduceSiblingCalls1, GraphDiffDeduceSiblingCalls1A,
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GraphDiffDeduceSiblingCalls),
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ifSpecified(GraphDiffInstrMap1, GraphDiffInstrMap1A, GraphDiffInstrMap),
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Trace()},
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{ifSpecified(GraphDiffKeepGoing2, GraphDiffKeepGoing2A,
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GraphDiffKeepGoing),
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ifSpecified(GraphDiffDeduceSiblingCalls2, GraphDiffDeduceSiblingCalls2A,
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GraphDiffDeduceSiblingCalls),
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ifSpecified(GraphDiffInstrMap2, GraphDiffInstrMap2A, GraphDiffInstrMap),
|
|
Trace()}}};
|
|
|
|
std::array<std::string, 2> Inputs{{GraphDiffInput1, GraphDiffInput2}};
|
|
|
|
std::array<GraphRenderer::GraphT, 2> Graphs;
|
|
|
|
for (int i = 0; i < 2; i++) {
|
|
auto TraceOrErr = loadTraceFile(Inputs[i], true);
|
|
if (!TraceOrErr)
|
|
return make_error<StringError>(
|
|
Twine("Failed Loading Input File '") + Inputs[i] + "'",
|
|
make_error_code(llvm::errc::invalid_argument));
|
|
Factories[i].Trace = std::move(*TraceOrErr);
|
|
|
|
auto GraphRendererOrErr = Factories[i].getGraphRenderer();
|
|
|
|
if (!GraphRendererOrErr)
|
|
return GraphRendererOrErr.takeError();
|
|
|
|
auto GraphRenderer = *GraphRendererOrErr;
|
|
|
|
Graphs[i] = GraphRenderer.getGraph();
|
|
}
|
|
|
|
GraphDiffRenderer::Factory DGF(Graphs[0], Graphs[1]);
|
|
|
|
auto GDROrErr = DGF.getGraphDiffRenderer();
|
|
if (!GDROrErr)
|
|
return GDROrErr.takeError();
|
|
|
|
auto &GDR = *GDROrErr;
|
|
|
|
std::error_code EC;
|
|
raw_fd_ostream OS(GraphDiffOutput, EC, sys::fs::OpenFlags::OF_Text);
|
|
if (EC)
|
|
return make_error<StringError>(
|
|
Twine("Cannot open file '") + GraphDiffOutput + "' for writing.", EC);
|
|
|
|
GDR.exportGraphAsDOT(OS, GraphDiffEdgeLabel, GraphDiffEdgeColor,
|
|
GraphDiffVertexLabel, GraphDiffVertexColor,
|
|
GraphDiffVertexLabelTrunc);
|
|
|
|
return Error::success();
|
|
});
|