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| author | Michael Anthony Knyszek <mknyszek@google.com> | 2019-09-16 21:23:24 +0000 |
|---|---|---|
| committer | Michael Knyszek <mknyszek@google.com> | 2019-11-08 18:00:54 +0000 |
| commit | a2cd2bd55d1e932b52f0b7dea45a85e058fc77d5 (patch) | |
| tree | 1d58c63c070f9e46bc68dd8c33d11cac61035a86 /src/runtime/malloc_test.go | |
| parent | 81640ea38dc6577bdf1b206b778b968d341c27eb (diff) | |
| download | go-a2cd2bd55d1e932b52f0b7dea45a85e058fc77d5.tar.gz go-a2cd2bd55d1e932b52f0b7dea45a85e058fc77d5.zip | |
runtime: add per-p page allocation cache
This change adds a per-p free page cache which the page allocator may
allocate out of without a lock. The change also introduces a completely
lockless page allocator fast path.
Although the cache contains at most 64 pages (and usually less), the
vast majority (85%+) of page allocations are exactly 1 page in size.
Updates #35112.
Change-Id: I170bf0a9375873e7e3230845eb1df7e5cf741b78
Reviewed-on: https://go-review.googlesource.com/c/go/+/195701
Run-TryBot: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Austin Clements <austin@google.com>
Diffstat (limited to 'src/runtime/malloc_test.go')
| -rw-r--r-- | src/runtime/malloc_test.go | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/runtime/malloc_test.go b/src/runtime/malloc_test.go index 1040fb6a8f..5ed4feb77d 100644 --- a/src/runtime/malloc_test.go +++ b/src/runtime/malloc_test.go @@ -168,6 +168,14 @@ func TestTinyAlloc(t *testing.T) { } } +func TestPageCacheLeak(t *testing.T) { + defer GOMAXPROCS(GOMAXPROCS(1)) + leaked := PageCachePagesLeaked() + if leaked != 0 { + t.Fatalf("found %d leaked pages in page caches", leaked) + } +} + func TestPhysicalMemoryUtilization(t *testing.T) { got := runTestProg(t, "testprog", "GCPhys") want := "OK\n" |