scudo: Use more size classes in the malloc_free_loop benchmarks.
As a result of recent changes to the Android size classes, the malloc_free_loop
benchmark started exhausting the 8192 size class at 32768 iterations. To avoid
this problem (and to make the test more realistic), change the benchmark to
use a variety of size classes.
Differential Revision: https://reviews.llvm.org/D73918
GitOrigin-RevId: 47cda0cb36bfee8b99061eec59d17152608bf3cc
diff --git a/benchmarks/malloc_benchmark.cpp b/benchmarks/malloc_benchmark.cpp
index 7138204..ce48dc0 100644
--- a/benchmarks/malloc_benchmark.cpp
+++ b/benchmarks/malloc_benchmark.cpp
@@ -69,12 +69,14 @@
void *Ptrs[NumIters];
for (auto _ : State) {
+ size_t SizeLog2 = 0;
for (void *&Ptr : Ptrs) {
- Ptr = Allocator->allocate(8192, scudo::Chunk::Origin::Malloc);
+ Ptr = Allocator->allocate(1 << SizeLog2, scudo::Chunk::Origin::Malloc);
auto *Data = reinterpret_cast<uint8_t *>(Ptr);
- for (size_t I = 0; I < 8192; I += PageSize)
+ for (size_t I = 0; I < 1 << SizeLog2; I += PageSize)
Data[I] = 1;
benchmark::DoNotOptimize(Ptr);
+ SizeLog2 = (SizeLog2 + 1) % 16;
}
for (void *&Ptr : Ptrs)
Allocator->deallocate(Ptr, scudo::Chunk::Origin::Malloc);
