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Expensive headers reports different information now
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Instead of listing the individual include chains all the way from the
source file, it lists the *how* paths that are included the most
times. e.g.:

261580 ms: /Developer/SDKs/MacOSX13.1.sdk/usr/include/c++/v1/algorithm (included 3389 times, avg 77 ms), included via:
  341x: BKE_context.h BLI_string_ref.hh string
  180x: DNA_mesh_types.h BLI_math_vector_types.hh array
  125x: DNA_space_types.h DNA_node_types.h DNA_node_tree_interface_types.h BLI_function_ref.hh BLI_memory_utils.hh

Which says, <algorithm> is included total 341 times via BKE_context.h
which includes BLI_string_ref.hh which includes string which includes
algorithm. And so on.
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@aras-p
aras-p committed Aug 13, 2023
1 parent dbaf140 commit 2a016a0
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79 changes: 44 additions & 35 deletions readme.md
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Expand Up @@ -39,53 +39,62 @@ The analysis output will look something like this:
```
Analyzing build trace from 'artifacts/FullCapture.bin'...
**** Time summary:
Compilation (1761 times):
Parsing (frontend): 5167.4 s
Codegen & opts (backend): 7576.5 s
Compilation (7664 times):
Parsing (frontend): 2118.9 s
Codegen & opts (backend): 1204.1 s
**** Files that took longest to parse (compiler frontend):
19524 ms: artifacts/Modules_TLS_0.o
18046 ms: artifacts/Editor_Src_4.o
17026 ms: artifacts/Modules_Audio_Public_1.o
16581 ms: artifacts/Runtime_Camera_4.o
5084 ms: cycles_scene.build/RelWithDebInfo/volume.o
4471 ms: extern_ceres.build/RelWithDebInfo/covariance_impl.o
4225 ms: bf_intern_libmv.build/RelWithDebInfo/resect.o
4121 ms: bf_blenkernel.build/RelWithDebInfo/volume_to_mesh.o
**** Files that took longest to codegen (compiler backend):
145761 ms: artifacts/Modules_TLS_0.o
123048 ms: artifacts/Runtime_Core_Containers_1.o
56975 ms: artifacts/Runtime_Testing_3.o
52031 ms: artifacts/Tools_ShaderCompiler_1.o
47123 ms: bf_blenkernel.build/RelWithDebInfo/volume.o
39617 ms: bf_blenkernel.build/RelWithDebInfo/volume_to_mesh.o
37488 ms: bf_modifiers.build/RelWithDebInfo/MOD_volume_displace.o
30676 ms: bf_gpu.build/RelWithDebInfo/gpu_shader_create_info.o
**** Templates that took longest to instantiate:
19006 ms: std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::... (2665 times, avg 7 ms)
12821 ms: std::__1::map<core::basic_string<char, core::StringStorageDefault<ch... (250 times, avg 51 ms)
9142 ms: std::__1::map<core::basic_string<char, core::StringStorageDefault<ch... (432 times, avg 21 ms)
8515 ms: std::__1::map<int, std::__1::pair<List<ListNode<Behaviour> > *, List... (392 times, avg 21 ms)
11172 ms: fmt::detail::vformat_to<char> (142 times, avg 78 ms)
6662 ms: std::__scalar_hash<std::_PairT, 2>::operator() (3549 times, avg 1 ms)
6281 ms: std::__murmur2_or_cityhash<unsigned long, 64>::operator() (3549 times, avg 1 ms)
5757 ms: std::basic_string<char>::basic_string (3597 times, avg 1 ms)
5541 ms: blender::CPPType::to_static_type_tag<float, blender::VecBase<float, ... (70 times, avg 79 ms)
**** Functions that took longest to compile:
8710 ms: yyparse(glslang::TParseContext*) (External/ShaderCompilers/glslang/glslang/MachineIndependent/glslang_tab.cpp)
4580 ms: LZ4HC_compress_generic_dictCtx (External/Compression/lz4/lz4hc_quarantined.c)
4011 ms: sqlite3VdbeExec (External/sqlite/sqlite3.c)
2737 ms: ProgressiveRuntimeManager::Update() (artifacts/Editor_Src_GI_Progressive_0.cpp)
**** Template sets that took longest to instantiate:
32421 ms: std::unique_ptr<$> (30461 times, avg 1 ms)
30098 ms: Eigen::MatrixBase<$> (8639 times, avg 3 ms)
27524 ms: Eigen::internal::call_assignment_no_alias<$> (2397 times, avg 11 ms)
**** Functions that took longest to compile:
28359 ms: gpu_shader_create_info_init (source/blender/gpu/intern/gpu_shader_create_info.cc)
4090 ms: ccl::GetConstantValues(ccl::KernelData const*) (intern/cycles/device/metal/kernel.mm)
3996 ms: gpu_shader_dependency_init (source/blender/gpu/intern/gpu_shader_dependency.cc)
**** Function sets that took longest to compile / optimize:
10606 ms: bool openvdb::v10_0::tree::NodeList<$>::initNodeChildren<$>(openvdb:... (470 times, avg 22 ms)
9640 ms: void tbb::interface9::internal::dynamic_grainsize_mode<$>::work_bala... (919 times, avg 10 ms)
9459 ms: void tbb::interface9::internal::dynamic_grainsize_mode<$>::work_bala... (715 times, avg 13 ms)
7279 ms: blender::Vector<$>::realloc_to_at_least(long long) (1840 times, avg 3 ms)
**** Expensive headers:
136567 ms: /BuildEnvironment/MacOSX10.14.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h (included 92 times, avg 1484 ms), included via:
CocoaObjectImages.o AppKit.h (2033 ms)
OSXNativeWebViewWindowHelper.o OSXNativeWebViewWindowHelper.h AppKit.h (2007 ms)
RenderSurfaceMetal.o RenderSurfaceMetal.h MetalSupport.h Metal.h MTLTypes.h (2003 ms)
OSXWebViewWindowPrivate.o AppKit.h (1959 ms)
261580 ms: /Developer/SDKs/MacOSX13.1.sdk/usr/include/c++/v1/algorithm (included 3389 times, avg 77 ms), included via:
341x: BKE_context.h BLI_string_ref.hh string
180x: DNA_mesh_types.h BLI_math_vector_types.hh array
125x: DNA_space_types.h DNA_node_types.h DNA_node_tree_interface_types.h BLI_function_ref.hh BLI_memory_utils.hh
...
112344 ms: Runtime/BaseClasses/BaseObject.h (included 729 times, avg 154 ms), included via:
PairTests.cpp TestFixtures.h (337 ms)
Stacktrace.cpp MonoManager.h GameManager.h EditorExtension.h (312 ms)
PlayerPrefs.o PlayerSettings.h GameManager.h EditorExtension.h (301 ms)
Animation.cpp MaterialDescription.h (299 ms)
188777 ms: /Developer/SDKs/MacOSX13.1.sdk/usr/include/c++/v1/string (included 3447 times, avg 54 ms), included via:
353x: BKE_context.h BLI_string_ref.hh
184x: DNA_mesh_types.h BLI_offset_indices.hh BLI_index_mask.hh BLI_linear_allocator.hh BLI_string_ref.hh
131x: DNA_node_types.h DNA_node_tree_interface_types.h BLI_span.hh
...
103856 ms: Runtime/Threads/ReadWriteLock.h (included 478 times, avg 217 ms), included via:
DownloadHandlerAssetBundle.cpp AssetBundleManager.h (486 ms)
LocalizationDatabase.cpp LocalizationDatabase.h LocalizationAsset.h StringTable.h (439 ms)
Runtime_BaseClasses_1.o MonoUtility.h ScriptingProfiler.h (418 ms)
174792 ms: source/blender/makesdna/DNA_node_types.h (included 1653 times, avg 105 ms), included via:
316x: ED_screen.hh DNA_space_types.h
181x: DNA_space_types.h
173x: <direct include>
...
```

Expand All @@ -104,7 +113,7 @@ Granularity and amount of most expensive things (files, functions, templates, in

* Does not capture anything related to linking or LTO right now.
* May or may not scale to _huge_ builds (I haven't tried on something ginormous like a Chrome
build). However I have tried it on Unity editor build and it was not terrible.
build). However I have tried it on Unity editor and Blender builds and it worked fine.


### License
Expand Down
73 changes: 28 additions & 45 deletions src/Analysis.cpp
View file
Expand Up @@ -16,6 +16,7 @@ struct IUnknown; // workaround for old Win SDK header failures when using /permi
#include <assert.h>
#include <string>
#include <string.h>
#include <map>
#include <vector>

struct Config
Expand Down Expand Up @@ -96,6 +97,7 @@ struct Analysis
{
std::vector<DetailIndex> files;
int64_t us = 0;
int count = 0;
};
struct IncludeEntry
{
Expand Down Expand Up @@ -197,24 +199,20 @@ void Analysis::ProcessEvent(EventIndex eventIndex)
chain.us = event.dur;
EventIndex parseIndex = event.parent;
bool hasHeaderBefore = false;
bool hasNonHeaderBefore = false;
while(parseIndex.idx >= 0)
{
const BuildEvent& ev2 = events[parseIndex];
if (ev2.type != BuildEventType::kParseFile)
break;
std::string_view ev2path = GetBuildName(ev2.detailIndex);
chain.files.push_back(ev2.detailIndex);
bool isHeader = utils::IsHeader(ev2path);
if (!isHeader)
break;
chain.files.push_back(ev2.detailIndex);
hasHeaderBefore |= isHeader;
hasNonHeaderBefore |= !isHeader;
parseIndex = ev2.parent;
}

// only add top-level source path if there was no non-header file down below
// the include chain (the top-level might be lump/unity file)
if (!hasNonHeaderBefore)
chain.files.push_back(FindPath(eventIndex));
e.root |= !hasHeaderBefore;
e.includePaths.push_back(chain);
}
Expand Down Expand Up @@ -487,8 +485,6 @@ void Analysis::EndAnalysis()
if (!expensiveHeaders.empty())
{
fprintf(out, "%s%s**** Expensive headers%s:\n", col::kBold, col::kMagenta, col::kReset);
ska::bytell_hash_map<DetailIndex, int> includedFromMap;
std::vector<std::pair<DetailIndex, int>> includedFromArray;
for (const auto& e : expensiveHeaders)
{
const auto& es = headerMap[e.first];
Expand All @@ -498,55 +494,42 @@ void Analysis::EndAnalysis()
int pathCount = 0;

// print most costly include chains
auto sortedIncludeChains = es.includePaths;
// merge identical include chains, recording their (count, totalTimeUs)
std::map<std::vector<DetailIndex>, std::pair<int,int64_t>> mergedIncludeChains;
for (const auto& chain : es.includePaths)
{
auto& dst = mergedIncludeChains[chain.files];
dst.first++;
dst.second += chain.us;
}
std::vector<IncludeChain> sortedIncludeChains;
sortedIncludeChains.reserve(mergedIncludeChains.size());
for (const auto& chain : mergedIncludeChains)
{
IncludeChain dst;
dst.files = chain.first;
dst.count = chain.second.first;
dst.us = chain.second.second;
sortedIncludeChains.emplace_back(dst);
}
std::sort(sortedIncludeChains.begin(), sortedIncludeChains.end(), [](const auto& a, const auto& b)
{
if (a.count != b.count)
return a.count > b.count;
if (a.us != b.us)
return a.us > b.us;
return a.files < b.files;
});
for (const auto& chain : sortedIncludeChains)
{
fprintf(out, " ");
fprintf(out, " %ix: ", chain.count);
for (auto it = chain.files.rbegin(), itEnd = chain.files.rend(); it != itEnd; ++it)
{
fprintf(out, "%s ", utils::GetFilename(GetBuildName(*it)).data());
}
fprintf(out, " (%i ms)\n", int(chain.us/1000));
++pathCount;
if (pathCount > config.headerChainCount)
break;
}
if (pathCount > config.headerChainCount)
{
fprintf(out, " ...\n");
}

// print most often happening includers
includedFromMap.clear();
for (const auto& chain : sortedIncludeChains)
{
if (chain.files.empty())
continue;
includedFromMap[chain.files.front()]++;
}
includedFromArray.resize(0);
includedFromArray.reserve(includedFromMap.size());
for (const auto& from : includedFromMap)
{
includedFromArray.push_back(from);
}
std::sort(includedFromArray.begin(), includedFromArray.end(), [&](const auto& a, const auto& b)
{
if (a.second != b.second)
return a.second > b.second;
return GetBuildName(a.first) < GetBuildName(b.first);
});
pathCount = 0;
fprintf(out, " included mostly from:\n");
for (const auto& from : includedFromArray)
{
fprintf(out, " %i: %s\n", from.second, utils::GetFilename(GetBuildName(from.first)).data());
fprintf(out, "<direct include>");
fprintf(out, "\n");
++pathCount;
if (pathCount > config.headerChainCount)
break;
Expand Down

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