Ayush RanjanandgVisor bot 2759f79fce Plumb safemem.ReaderFunc through pgalloc.Allocate() to avoid heap allocations. ...

The safemem.Reader interface receiver was causing the implementation to escape
to heap (as at compile time, the compiler can not prove anything about the
implementation).

Using generics for io.ReadFullToBlocks() does not help in avoiding the heap
allocation.

With this change, we avoid at least these allocations:
- rw variable in kcov.Kcov.TaskWork().
- safemem.BlockSeqReader struct in in mm.MemoryManager.getPMAsInternalLocked().
- gr variable in fsutil.FileRangeSet.Fill().
- h variable in gofer.dentry.Translate().
- h variable in gofer.dentryReadWriter.ReadToBlocks().

Some of these are on hot paths for IO workloads.

PiperOrigin-RevId: 609805848

2024-02-23 12:32:25 -08:00

..

block_unsafe.go

use new clear builtin to clear bufs

2023-11-27 19:43:25 +02:00

BUILD

Add default_applicable_licenses rules to packages.

2023-03-02 10:50:04 -08:00

io_test.go

Plumb safemem.ReaderFunc through pgalloc.Allocate() to avoid heap allocations.

2024-02-23 12:32:25 -08:00

io.go

Plumb safemem.ReaderFunc through pgalloc.Allocate() to avoid heap allocations.

2024-02-23 12:32:25 -08:00

safemem.go

Update package locations.

2020-01-27 15:31:32 -08:00

seq_test.go

Ensure that safemem.BlockSeqOf(safemem.Block{}) produces an empty BlockSeq.

2020-03-04 14:30:27 -08:00

seq_unsafe.go

Replace gohacks.SliceHeader with unsafe.Slice

2023-01-26 13:35:25 -08:00