gocore: distinguish released memory
Split up the free span space into 2 categories, the space which we
have released back to the OS vs the space we haven't.
Change-Id: I897c57a10e5cb4ab7321711fece8addcf5f4ab19
Reviewed-on: https://go-review.googlesource.com/92417
Reviewed-by: Austin Clements <austin@google.com>
diff --git a/gocore/process.go b/gocore/process.go
index 2e061c8..de034c8 100644
--- a/gocore/process.go
+++ b/gocore/process.go
@@ -254,6 +254,7 @@
allspans := mheap.Field("allspans")
var allSpanSize int64
var freeSpanSize int64
+ var releasedSpanSize int64
var manualSpanSize int64
var inUseSpanSize int64
var allocSize int64
@@ -320,6 +321,8 @@
}
case spanFree:
freeSpanSize += spanSize
+ nReleased := int64(s.Field("npreleased").Uintptr())
+ releasedSpanSize += nReleased * pageSize
case spanDead:
// These are just deallocated span descriptors. They use no heap.
case spanManual:
@@ -347,7 +350,10 @@
&Stats{"alloc", manualAllocSize, nil},
&Stats{"free", manualFreeSize, nil},
}},
- &Stats{"free spans", freeSpanSize, nil},
+ &Stats{"free spans", freeSpanSize, []*Stats{
+ &Stats{"retained", freeSpanSize - releasedSpanSize, nil},
+ &Stats{"released", releasedSpanSize, nil},
+ }},
}},
&Stats{"ptr bitmap", bitmap, nil},
&Stats{"span table", spanTable, nil},
