cybercyst/go
1
0
Fork 0
mirror of https://github.com/golang/go.git synced 2025-05-19 22:33:25 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

doc: write various runtime-related release notes

Browse Source 
This includes release notes for several small runtime changes, including
runtime/trace and runtime package changes.

For #58645.

Change-Id: I3e9c804da1bb6b385088e16a20d9576c11098021
Reviewed-on: https://go-review.googlesource.com/c/go/+/497095
Auto-Submit: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Austin Clements <austin@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ansiwen <ansiwen@gmail.com>
Reviewed-by: Felix Geisendörfer <felix.geisendoerfer@datadoghq.com>
Run-TryBot: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
This commit is contained in:
Michael Anthony Knyszek 2023-05-22 19:23:21 +00:00 committed by Gopher Robot
parent f96e193320
commit b03d12176d
1 changed files with 56 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

56
doc/go1.21.html
View File

@ -51,6 +51,8 @@ Do not send CLs removing the interior tags from such phrases.
<!-- replace CallImport with go:wasmimport directive -->
</p>
<h3 id="wasip1">WebAssembly</h3>
<!-- https://go.dev/issue/59149 -->
<p>
<!-- allow the use of go:wasmimport globally -->
@ -61,6 +63,13 @@ Do not send CLs removing the interior tags from such phrases.
<!-- cmd/compile: remove go:wasmimport restriction -->
</p>
<!-- https://go.dev/issue/56100 -->
<p>
The Go scheduler now interacts much more efficiently with the
JavaScript event loop, especially in applications that block
frequently on asynchronous events.
</p>
<h3 id="wasip1">WebAssembly System Interface</h3>
@ -121,6 +130,27 @@ Do not send CLs removing the interior tags from such phrases.
valuable for debugging stack overflows.
</p>
<p><!-- https://go.dev/issue/59960 -->
On Linux platforms that support transparent huge pages, the Go runtime
now manages which parts of the heap may be backed by huge pages more
explicitly. This leads to better utilization of memory: small heaps
should see less memory used (up to 50% in pathological cases) while
large heaps should see fewer broken huge pages for dense parts of the
heap, improving CPU usage and latency by up to 1%.
</p>
<p><!-- https://go.dev/issue/57069, https://go.dev/issue/56966 -->
As a result of runtime-internal garbage collection tuning,
applications may see up to a 40% reduction in application tail latency
and a small decrease in memory use. Some applications may also observe
a small loss in throughput.
The memory use decrease should be proportional to the loss in
throughput, such that the previous release's throughput/memory
tradeoff may be recovered (with little change to latency) by
increasing <code>GOGC</code> and/or <code>GOMEMLIMIT</code> slightly.
</p>
<h2 id="compiler">Compiler</h2>
<!-- CL 490819 -->
@ -638,9 +668,35 @@ Do not send CLs removing the interior tags from such phrases.
<p><!-- CL 474915 -->
TODO: <a href="https://go.dev/cl/474915">https://go.dev/cl/474915</a>: runtime: support GOTRACEBACK=wer on Windows
</p>
<p><!-- https://go.dev/issue/46787 -->
A new type <code>Pinner</code> has been added to the runtime
package. <code>Pinner</code>s may be used to "pin" Go memory
such that it may be used more freely by non-Go code. For instance,
passing Go values that reference pinned Go memory to C code is
now allowed. Previously, passing any such nested reference was
disallowed by the
<a href="https://pkg.go.dev/cmd/cgo#hdr-Passing_pointers">cgo pointer passing rules.</a>
See <a href="/pkg/runtime#Pinner">the docs</a> for more details.
</p>
</dd>
</dl><!-- runtime -->
<dl id="runtime/trace"><dt><a href="/pkg/runtime/trace/">runtime/trace</a></dt>
<dd>
<p><!-- https://go.dev/issue/16638 -->
Collecting traces on amd64 and arm64 now incurs a substantially
smaller CPU cost: up to a 10x improvement over the previous release.
</p>
<p><!-- CL 494495 -->
Traces now contain explicit stop-the-world events for every reason
the Go runtime might stop-the-world, not just garbage collection.
</p>
</dd>
</dl><!-- runtime/trace -->
<dl id="slices"><dt><a href="/pkg/slices/">slices</a></dt>
<dd>
<p><!-- https://go.dev/issue/54768 -->