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optimization: BlockAllocator: Actually allocate in blocks

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Instead of hitting the heap for each and every call to Create()

Significantly improves performance for heavy loads. Slight performance
loss for lighter loads.

A: base.bench
B: new.bench

Test name                             | Δ (A → B)    | % (A → B)
--------------------------------------+--------------+-----------
GenerateSPIRV/"simple_fragment.wgsl"  | 27.021µs     | +6.4%
GenerateMSL/"simple_compute.wgsl"     | 35.592µs     | +6.1%
GenerateMSL/"simple_vertex.wgsl"      | 37.64µs      | +5.5%
GenerateHLSL/"simple_fragment.wgsl"   | 42.145µs     | +5.2%
GenerateGLSL/"simple_fragment.wgsl"   | 31.506µs     | +4.9%
GenerateHLSL/"simple_vertex.wgsl"     | 38.843µs     | +4.7%
GenerateMSL/"simple_fragment.wgsl"    | 29.977µs     | +4.5%
GenerateSPIRV/"simple_vertex.wgsl"    | 19.882µs     | +4.2%
GenerateGLSL/"simple_vertex.wgsl"     | 24.702µs     | +3.7%
GenerateSPIRV/"simple_compute.wgsl"   | 17.652µs     | +3.2%
GenerateHLSL/"simple_compute.wgsl"    | 26.826µs     | +2.7%
GenerateGLSL/"simple_compute.wgsl"    | 11.952µs     | +1.8%
ParseWGSL/"particles.wgsl"            | -104.83µs    | -4.2%
GenerateMSL/"particles.wgsl"          | -1.079243ms  | -9.4%
GenerateSPIRV/"particles.wgsl"        | -1.012483ms  | -9.4%
GenerateGLSL/"particles.wgsl"         | -3.522106ms  | -9.5%
GenerateHLSL/"particles.wgsl"         | -1.849666ms  | -10.6%

Issue: tint:1383
Change-Id: Ib691328538c597c06a75dfba392c99d2afbd5442
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/76961
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
This commit is contained in:
Ben Clayton
2022-01-22 20:32:38 +00:00
committed by Tint LUCI CQ
parent 73ced33dfb
commit ba1a8f8d05
6 changed files with 260 additions and 128 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
fuzzers/tint_ast_clone_fuzzer.cc
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@@ -73,11 +73,11 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
ASSERT_EQ(tint::Program::printer(&src), tint::Program::printer(&dst));
// Check that none of the AST nodes or type pointers in dst are found in src
std::unordered_set<tint::ast::Node*> src_nodes;
std::unordered_set<const tint::ast::Node*> src_nodes;
for (auto* src_node : src.ASTNodes().Objects()) {
src_nodes.emplace(src_node);
}
std::unordered_set<tint::sem::Type*> src_types;
std::unordered_set<const tint::sem::Type*> src_types;
for (auto* src_type : src.Types()) {
src_types.emplace(src_type);
}