Commit Graph

135 Commits

Author SHA1 Message Date
Nick Ripley f0cb44a773 cmd/trace: fix error message for bad goroutine state transition
The error message when an invalid goroutine state transition is found in
a trace should show the current state, not the next state, when
comparing against the expected current state.

This CL also picks up a gofmt change to the file.

Change-Id: Ic0ce6c9ce79d8a784b73b115b5db76c311b8593d
Reviewed-on: https://go-review.googlesource.com/c/go/+/467416
Auto-Submit: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2023-02-10 21:45:16 +00:00
Michael Pratt d2b5a6f332 cmd/trace: only include required frames in splits
Though we split traces into 100MB chunks, currently each chunk always
includes the entire stack frame map, including frames for all events in
the trace file, even if they aren't needed by events in this chunk.

This means that if the stack frame JSON alone is >100MB then there is no
space at all for events. In that case, we'll generate splits each
containing 1 event, which is effectively useless.

Handle this more efficiently by only including stack frames referenced
by events in the chunk. Each marginal events only adds at most a few
dozen stack frames, so it should now longer be possible to only include
a tiny number of events.

Fixes #56444.

Change-Id: I58aa8f271c32678028b72d82df16e6ea762ebb39
Reviewed-on: https://go-review.googlesource.com/c/go/+/445895
Run-TryBot: Michael Pratt <mpratt@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Auto-Submit: Michael Pratt <mpratt@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2022-11-07 17:58:30 +00:00
cui fliter 58158e990f all: use fmt.Appendf
Change-Id: I45f941ba3db26a12b3f56d93bdcd7f9e1d490346
GitHub-Last-Rev: 22b51167b0
GitHub-Pull-Request: golang/go#56030
Reviewed-on: https://go-review.googlesource.com/c/go/+/438539
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
2022-10-04 22:43:12 +00:00
cuiweixie a8d180409d cmd/trace: replace loop with append(slice, slice2...)
Change-Id: I4686f36a8f718fea1a08d816bc14e24e3528bb07
Reviewed-on: https://go-review.googlesource.com/c/go/+/436706
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: hopehook <hopehook@golangcn.org>
Run-TryBot: xie cui <523516579@qq.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Ian Lance Taylor <iant@google.com>
2022-10-03 15:30:36 +00:00
cuiweixie e5ed2212a3 cmd/trace: use strings.Builder
Change-Id: I690dc517c08be4cd66439baad8b91f16622ff0d2
Reviewed-on: https://go-review.googlesource.com/c/go/+/428292
Reviewed-by: Michael Pratt <mpratt@google.com>
Run-TryBot: Michael Pratt <mpratt@google.com>
Auto-Submit: Michael Pratt <mpratt@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2022-09-08 14:33:45 +00:00
hitzhangjie 04eb35998a cmd/trace: display goroutines (PC=0) with clearer description
This PR fixes: #54425 #49994

Change-Id: Id60a3ba6930f8e29b12b6d8f80945decd2ce31bc
GitHub-Last-Rev: 60a040aa2f
GitHub-Pull-Request: golang/go#54575
Reviewed-on: https://go-review.googlesource.com/c/go/+/425042
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
2022-08-25 20:44:19 +00:00
Michael Pratt 123a6328b7 internal/trace: don't report regions on system goroutines
If a goroutine is started within a user region, internal/trace assigns
the child goroutine a nameless region for its entire lifetime which is
assosciated the same task as the parent's region.

This is not strictly necessary: a child goroutine is not necessarily
related to the task unless it performs some task operation (in which
case it will be associated with the task through the standard means).

However, it can be quite handy to see child goroutines within a region,
which may be child worker goroutines that you simply didn't perform task
operations on.

If the first GC occurs during a region, the GC worker goroutines will
also inherit a child region. We know for sure that these aren't related
to the task, so filter them out from the region list.

Note that we can't exclude system goroutines from setting activeRegions
in EvGoCreate handling, because we don't know the goroutine start
function name until the first EvGoStart.

Fixes #53784.

Change-Id: Ic83d84e23858a8400a76d1ae2f1418ef49951178
Reviewed-on: https://go-review.googlesource.com/c/go/+/416858
Run-TryBot: Michael Pratt <mpratt@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
2022-07-11 21:24:38 +00:00
Tobias Klauser b75ad09cae cmd/trace: fix typo in web documentation
Change-Id: I950224c3f698fbdf2bcab6f847f4afddaa6e9c2d
Reviewed-on: https://go-review.googlesource.com/c/go/+/416974
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Alan Donovan <adonovan@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Alan Donovan <adonovan@google.com>
2022-07-11 19:54:22 +00:00
Alan Donovan be0b2a393a cmd/trace: add basic documentation to main page
This change adds rudimentary explanation of the various
visualizations to main page of the trace server.
There is clearly a vast amount one could write here,
especially in the form of tutorials, but I've tried to
restrict it to just basic conceptual overview.

Change-Id: Id4dfe9d47f9b31ed5f8fe39f8b3a7c60c0ae8d5a
Reviewed-on: https://go-review.googlesource.com/c/go/+/412876
Reviewed-by: Michael Pratt <mpratt@google.com>
Run-TryBot: Alan Donovan <adonovan@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2022-06-22 02:40:04 +00:00
John Bampton 524210bbb2 doc: lint Markdown for trailing spaces and code blocks
MD009 Trailing spaces.
MD031 Fenced code blocks should be surrounded by blank lines.

https://github.com/markdownlint/markdownlint/blob/master/docs/RULES.md

Change-Id: I6a2fff4afa8224442d90b30f84444b4a888fcef2
GitHub-Last-Rev: 67cf146b85
GitHub-Pull-Request: golang/go#44285
Reviewed-on: https://go-review.googlesource.com/c/go/+/292409
Reviewed-by: Robert Griesemer <gri@google.com>
Auto-Submit: Alex Rakoczy <alex@golang.org>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Alex Rakoczy <alex@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
2022-05-27 15:07:38 +00:00
Rhys Hiltner 2c0a9884e0 runtime: add CPU samples to execution trace
When the CPU profiler and execution tracer are both active, report the
CPU profile samples in the execution trace data stream.

Include only samples that arrive on the threads known to the runtime,
but include them even when running g0 (such as near the scheduler) or if
there's no P (such as near syscalls).

Render them in "go tool trace" as instantaneous events.

For #16895

Change-Id: I0aa501a7b450c971e510961c0290838729033f7f
Reviewed-on: https://go-review.googlesource.com/c/go/+/400795
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Run-TryBot: Rhys Hiltner <rhys@justin.tv>
Reviewed-by: David Chase <drchase@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2022-05-03 20:49:46 +00:00
Russ Cox d922c0a8f5 all: use os/exec instead of internal/execabs
We added internal/execabs back in January 2021 in order to fix
a security problem caused by os/exec's handling of the current
directory. Now that os/exec has that code, internal/execabs is
superfluous and can be deleted.

This commit rewrites all the imports back to os/exec and
deletes internal/execabs.

For #43724.

Change-Id: Ib9736baf978be2afd42a1225e2ab3fd5d33d19df
Reviewed-on: https://go-review.googlesource.com/c/go/+/381375
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Auto-Submit: Russ Cox <rsc@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
2022-05-02 17:49:12 +00:00
Michael Pratt 889a902d21 cmd/trace: embed static content
cmd/trace is currently somewhat painful to use in odd environments since
it depends on the presence of $GOROOT/misc/trace to serve the static
trace viewer content.

Use //go:embed to embed this content directly into cmd/trace for easier
use.

Change-Id: I83b7d97dbecc9773f3b5a6b3bc4a6597473bc01a
Reviewed-on: https://go-review.googlesource.com/c/go/+/378194
Run-TryBot: Michael Pratt <mpratt@google.com>
Auto-Submit: Michael Pratt <mpratt@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2022-04-21 21:18:18 +00:00
Russ Cox 19309779ac all: gofmt main repo
[This CL is part of a sequence implementing the proposal #51082.
The design doc is at https://go.dev/s/godocfmt-design.]

Run the updated gofmt, which reformats doc comments,
on the main repository. Vendored files are excluded.

For #51082.

Change-Id: I7332f099b60f716295fb34719c98c04eb1a85407
Reviewed-on: https://go-review.googlesource.com/c/go/+/384268
Reviewed-by: Jonathan Amsterdam <jba@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2022-04-11 16:34:30 +00:00
Russ Cox 2580d0e08d all: gofmt -w -r 'interface{} -> any' src
And then revert the bootstrap cmd directories and certain testdata.
And adjust tests as needed.

Not reverting the changes in std that are bootstrapped,
because some of those changes would appear in API docs,
and we want to use any consistently.
Instead, rewrite 'any' to 'interface{}' in cmd/dist for those directories
when preparing the bootstrap copy.

A few files changed as a result of running gofmt -w
not because of interface{} -> any but because they
hadn't been updated for the new //go:build lines.

Fixes #49884.

Change-Id: Ie8045cba995f65bd79c694ec77a1b3d1fe01bb09
Reviewed-on: https://go-review.googlesource.com/c/go/+/368254
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
2021-12-13 18:45:54 +00:00
Zvonimir Pavlinovic 1292e21241 cmd/trace: use fmt.Print for newline-ending fixed string
This redundancy is now caught by the improved printf vet checker.

Updates #49322

Change-Id: Ic7a931b8d4838be02ebb855b69624b95093bd114
Reviewed-on: https://go-review.googlesource.com/c/go/+/361265
Run-TryBot: Zvonimir Pavlinovic <zpavlinovic@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Zvonimir Pavlinovic <zpavlinovic@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-11-04 00:36:13 +00:00
Russ Cox f229e7031a all: go fix -fix=buildtag std cmd (except for bootstrap deps, vendor)
When these packages are released as part of Go 1.18,
Go 1.16 will no longer be supported, so we can remove
the +build tags in these files.

Ran go fix -fix=buildtag std cmd and then reverted the bootstrapDirs
as defined in src/cmd/dist/buildtool.go, which need to continue
to build with Go 1.4 for now.

Also reverted src/vendor and src/cmd/vendor, which will need
to be updated in their own repos first.

Manual changes in runtime/pprof/mprof_test.go to adjust line numbers.

For #41184.

Change-Id: Ic0f93f7091295b6abc76ed5cd6e6746e1280861e
Reviewed-on: https://go-review.googlesource.com/c/go/+/344955
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2021-10-28 18:17:57 +00:00
Leonard Wang cf12b0d1f9 cmd/trace: use newTaskDesc to create taskDesc
Change-Id: I9bec8e2c4a9e1b9aa2baf883504200b5674844f8
Reviewed-on: https://go-review.googlesource.com/c/go/+/335609
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
Trust: Michael Knyszek <mknyszek@google.com>
Trust: Michael Pratt <mpratt@google.com>
2021-08-17 16:22:15 +00:00
Michael Anthony Knyszek 3eaf75c13a runtime: move next_gc and last_next_gc into gcControllerState
This change moves next_gc and last_next_gc into gcControllerState under
the names heapGoal and lastHeapGoal respectively. These are
fundamentally GC pacer related values, and so it makes sense for them to
live here.

Partially generated by

rf '
    ex . {
	memstats.next_gc -> gcController.heapGoal
	memstats.last_next_gc -> gcController.lastHeapGoal
    }
'

except for updates to comments and gcControllerState methods, where
they're accessed through the receiver, and trace-related renames of
NextGC -> HeapGoal, while we're here.

For #44167.

Change-Id: I1e871ad78a57b01be8d9f71bd662530c84853bed
Reviewed-on: https://go-review.googlesource.com/c/go/+/306603
Trust: Michael Knyszek <mknyszek@google.com>
Run-TryBot: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Michael Pratt <mpratt@google.com>
2021-04-14 14:03:30 +00:00
John Bampton 8e725f8452 all: use HTML5 br tags
In HTML5 br tags don't need a closing slash

Change-Id: Ic53c43faee08c5b1267daa9a02cc186b1c255ca1
GitHub-Last-Rev: 6522081169
GitHub-Pull-Request: golang/go#44283
Reviewed-on: https://go-review.googlesource.com/c/go/+/292370
Reviewed-by: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Emmanuel Odeke <emmanuel@orijtech.com>
2021-03-13 03:38:42 +00:00
Russ Cox d4b2638234 all: go fmt std cmd (but revert vendor)
Make all our package sources use Go 1.17 gofmt format
(adding //go:build lines).

Part of //go:build change (#41184).
See https://golang.org/design/draft-gobuild

Change-Id: Ia0534360e4957e58cd9a18429c39d0e32a6addb4
Reviewed-on: https://go-review.googlesource.com/c/go/+/294430
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Jason A. Donenfeld <Jason@zx2c4.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-02-20 03:54:50 +00:00
Roland Shoemaker 953d1feca9 all: introduce and use internal/execabs
Introduces a wrapper around os/exec, internal/execabs, for use in
all commands. This wrapper prevents exec.LookPath and exec.Command from
running executables in the current directory.

All imports of os/exec in non-test files in cmd/ are replaced with
imports of internal/execabs.

This issue was reported by RyotaK.

Fixes CVE-2021-3115
Fixes #43783

Change-Id: I0423451a6e27ec1e1d6f3fe929ab1ef69145c08f
Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/955304
Reviewed-by: Russ Cox <rsc@google.com>
Reviewed-by: Katie Hockman <katiehockman@google.com>
Reviewed-on: https://go-review.googlesource.com/c/go/+/284783
Run-TryBot: Roland Shoemaker <roland@golang.org>
Reviewed-by: Katie Hockman <katie@golang.org>
Trust: Roland Shoemaker <roland@golang.org>
2021-01-21 19:10:18 +00:00
Russ Cox 4f1b0a44cb all: update to use os.ReadFile, os.WriteFile, os.CreateTemp, os.MkdirTemp
As part of #42026, these helpers from io/ioutil were moved to os.
(ioutil.TempFile and TempDir became os.CreateTemp and MkdirTemp.)

Update the Go tree to use the preferred names.

As usual, code compiled with the Go 1.4 bootstrap toolchain
and code vendored from other sources is excluded.

ReadDir changes are in a separate CL, because they are not a
simple search and replace.

For #42026.

Change-Id: If318df0216d57e95ea0c4093b89f65e5b0ababb3
Reviewed-on: https://go-review.googlesource.com/c/go/+/266365
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2020-12-09 19:12:23 +00:00
Russ Cox 1b09d43067 all: update references to symbols moved from io/ioutil to io
The old ioutil references are still valid, but update our code
to reflect best practices and get used to the new locations.

Code compiled with the bootstrap toolchain
(cmd/asm, cmd/dist, cmd/compile, debug/elf)
must remain Go 1.4-compatible and is excluded.
Also excluded vendored code.

For #41190.

Change-Id: I6d86f2bf7bc37a9d904b6cee3fe0c7af6d94d5b1
Reviewed-on: https://go-review.googlesource.com/c/go/+/263142
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
2020-10-20 18:41:18 +00:00
Michael Matloob cc700bdc26 cmd/trace: move viewer data structs into cmd/internal/traceviewer
The ViewerEvent, ViewerData and ViewerFrame structs are moved into
cmd/internal/traceviewer, and renamed Event, Data, and Frame.

The structs are the same, except for the following: A definition
for the JSON "bp" field that's defined in the trace format, but
missing in the structs has been added. Also, the Tid and Pid fields
on Event have been renamed TID and PID to better match Go style.
Finally, the footer field on ViewerData, which hasn't been used
for a while, has been removed.

This CL is in preparation for the usage of these structs by cmd/go's
tracing functionality.

Updates #38714

Change-Id: I345f23617b96d4629b876ae717f89d56a67e05a3
Reviewed-on: https://go-review.googlesource.com/c/go/+/239098
Run-TryBot: Michael Matloob <matloob@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Jay Conrod <jayconrod@google.com>
2020-08-12 18:34:48 +00:00
Rohith Ravi af55060b39 cmd/trace: fix the broken link in region pages and improve UX
The trace tool had a broken link due to a parameter encoding error,
which has been corrected.

In addition:

- the user regions page has been enhanced to include links to
pprof style profiles for region specific io, block, syscall and
schedwait profiles.

- sortable table headers have a pointer cursor to indicate they're
clickable.

Fixes #38518

Change-Id: I26cd5157bd9753750f5f53ea03aac5d2d41b021c
Reviewed-on: https://go-review.googlesource.com/c/go/+/228899
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
2020-04-21 14:57:43 +00:00
Hana (Hyang-Ah) Kim 28a55d0123 cmd/trace: use the focustask mode for user task/region trace views
The taskid mode is based on the goroutine-oriented trace view,
which displays each goroutine as a separate row. This is good when
inspecting the interaction and timeline among related goroutines,
and the user region information (associated with each goroutine)
in detail, but when many goroutines are involved, this mode does
not scale.

The focustask mode is based on the default trace view with the
user task hierarchy at the top. Each row is a P and there are only
a handful number of Ps in most cases, so browsers can handle
this mode more gracefully. But, I had difficulty in displaying
the user region information (because a goroutine can start/stop/
migrate across Ps, and visualizing the stack of regions nicely
was complicated). It may be doable, but it's a work.

This CL surfaces the hidden focustask mode. Moreover, use it
as the default user task view mode. The taskid mode can be still
accessible through 'goroutine view' links.

Unlike taskid-based user annotation view that extends goroutine-based
trace view, the focustask view

Change-Id: Ib691a5e1dd14695fa70a0ae67bff62817025e8c3
Reviewed-on: https://go-review.googlesource.com/c/go/+/227921
Reviewed-by: Michael Matloob <matloob@golang.org>
Run-TryBot: Hyang-Ah Hana Kim <hyangah@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-04-13 17:18:58 +00:00
Hana (Hyang-Ah) Kim 75ea964b3f cmd/trace: update to use WebComponents V0 polyfill
Old trace viewer stopped working with Chrome M80+ because the
old trace viewer heavily depended on WebComponents V0 which are deprecated.
Trace viewer recently migrated to use WebComponents V0 polyfill
(crbug.com/1036492). This CL brings in the newly updated trace_viewer_full.html
(sync'd @ 9508452e)
and updates the javascript snippet included in the /trace endpoint
to use the polyfill.

This brings in webcomponents.min.js copied from
https://chromium.googlesource.com/catapult/+/9508452e18f130c98499cb4c4f1e1efaedee8962/third_party/polymer/components/webcomponentsjs/webcomponents.min.js

That is necessary because the /trace endpoint needs to import
the vulcanized trace_viewer_full.html.

It's possible that some features are not working correctly with
this polyfill. In that case, report the issue to crbug.com/1036492.
There will be a warning message in the UI (yellow banner above the timeline)
which can be hidden by clicking the 'hide' button.

This allows to render the trace in browsers other than chrome in theory,
but I observed some buttons and functions still don't work outside
chrome.

Fixes #34374.

Change-Id: Ib575f756f5e6b22ad904ede6e4d224a995ebe259
Reviewed-on: https://go-review.googlesource.com/c/go/+/219997
Run-TryBot: Hyang-Ah Hana Kim <hyangah@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
2020-02-20 19:12:11 +00:00
Rhys Hiltner a4c579e8f7 runtime: emit trace event in direct semaphore handoff
When a goroutine yields the remainder of its time to another goroutine
during direct semaphore handoff (as in an Unlock of a sync.Mutex in
starvation mode), it needs to signal that change to the execution
tracer. The discussion in CL 200577 didn't reach consensus on how best
to describe that, but pointed out that "traceEvGoSched / goroutine calls
Gosched" could be confusing.

Emit a "traceEvGoPreempt / goroutine is preempted" event in this case,
to allow the execution tracer to find a consistent event ordering
without being both specific and inaccurate about why the active
goroutine has changed.

Fixes #36186

Change-Id: Ic4ade19325126db2599aff6aba7cba028bb0bee9
Reviewed-on: https://go-review.googlesource.com/c/go/+/211797
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
2020-01-02 20:13:03 +00:00
Shulhan ed7f323c8f all: simplify code using "gofmt -s -w"
Most changes are removing redundant declaration of type when direct
instantiating value of map or slice, e.g. []T{T{}} become []T{{}}.

Small changes are removing the high order of subslice if its value
is the length of slice itself, e.g. T[:len(T)] become T[:].

The following file is excluded due to incompatibility with go1.4,

- src/cmd/compile/internal/gc/ssa.go

Change-Id: Id3abb09401795ce1e6da591a89749cba8502fb26
Reviewed-on: https://go-review.googlesource.com/c/go/+/166437
Run-TryBot: Dave Cheney <dave@cheney.net>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2019-05-06 22:19:22 +00:00
Leon Klingele d090429ea9 all: fix typos as reported by 'misspell'
Change-Id: I904b8655f21743189814bccf24073b6fbb9fc56d
GitHub-Last-Rev: b032c14394
GitHub-Pull-Request: golang/go#29997
Reviewed-on: https://go-review.googlesource.com/c/160421
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2019-02-26 23:02:05 +00:00
Tobias Klauser 9e277f7d55 all: use "reports whether" consistently instead of "returns whether"
Follow-up for CL 147037 and after Brad noticed the "returns whether"
pattern during the review of CL 150621.

Go documentation style for boolean funcs is to say:

    // Foo reports whether ...
    func Foo() bool

(rather than "returns whether")

Created with:

    $ perl -i -npe 's/returns whether/reports whether/' $(git grep -l "returns whether" | grep -v vendor)

Change-Id: I15fe9ff99180ad97750cd05a10eceafdb12dc0b4
Reviewed-on: https://go-review.googlesource.com/c/150918
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-12-02 15:12:26 +00:00
Hana Kim 6d5caf38e3 cmd/trace: revert internal/traceparser
The performance improvement is not as big as we hoped.
Until the API is feature complete, we postpone the release
and avoid added complexity.

This change was prepared by reverting all the changes affected
src/cmd/trace and src/internal/traceparser packages after
golang.org/cl/137635, and then bringing back MMU computation
APIs (originally in src/internal/traceparser) to the
src/internal/trace package.

Revert "cmd/trace: use new traceparser to parse the raw trace files"
This reverts https://golang.org/cl/145457
  (commit 08816cb8d7).

Revert "internal/traceparser: provide parser that uses less space and parses segments of runtime trace files"
This reverts https://golang.org/cl/137635
  (commit daaf361f74).

Change-Id: Ic2a068a7dbaf4053cd9674ca7bde9c58e74385b4
Reviewed-on: https://go-review.googlesource.com/c/150517
Run-TryBot: Hyang-Ah Hana Kim <hyangah@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
2018-11-22 02:59:55 +00:00
Austin Clements e72595ee0f cmd/trace: notes on MMU view improvements
Change-Id: Ib9dcdc76095f6718f1cdc83349503f52567c76d4
Reviewed-on: https://go-review.googlesource.com/c/60801
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
2018-11-05 19:10:33 +00:00
Austin Clements b251d7fbe6 cmd/trace: display p99.9, p99 and p95 MUT
This uses the mutator utilization distribution to compute the p99.9,
p99, and p95 mutator utilization topograph lines and display them
along with the MMU.

Change-Id: I8c7e0ec326aa4bc00619ec7562854253f01cc802
Reviewed-on: https://go-review.googlesource.com/c/60800
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
2018-11-05 19:10:29 +00:00
Austin Clements b2e8dd1873 cmd/trace: expose MMU analysis flags in web UI
Change-Id: I672240487172380c9eef61837b41698021aaf834
Reviewed-on: https://go-review.googlesource.com/c/60798
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
2018-11-05 19:10:25 +00:00
Austin Clements bef4efc822 internal/trace: add "per-P" MMU analysis
The current MMU analysis considers all Ps together, so if, for
example, one of four Ps is blocked, mutator utilization is 75%.
However, this is less useful for understanding the impact on
individual goroutines because that one blocked goroutine could be
blocked for a very long time, but we still appear to have good
utilization.

Hence, this introduces a new flag that does a "per-P" analysis where
the utilization of each P is considered independently. The MMU is then
the combination of the MMU for each P's utilization function.

Change-Id: Id67b980d4d82b511d28300cdf92ccbb5ae8f0c78
Reviewed-on: https://go-review.googlesource.com/c/60797
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
2018-11-05 19:10:23 +00:00
Austin Clements 27920c8ddc internal/trace: flags for what to include in GC utilization
Change-Id: I4ba963b003cb25b39d7575d423f17930d84f3f69
Reviewed-on: https://go-review.googlesource.com/c/60796
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
2018-11-05 19:10:20 +00:00
Austin Clements 603af813d6 cmd/trace: list and link to worst mutator utilization windows
This adds the ability to click a point on the MMU graph to show a list
of the worst 10 mutator utilization windows of the selected size. This
list in turn links to the trace viewer to drill down on specifically
what happened in each specific window.

Change-Id: Ic1b72d8b37fbf2212211c513cf36b34788b30133
Reviewed-on: https://go-review.googlesource.com/c/60795
Run-TryBot: Austin Clements <austin@google.com>
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2018-11-05 19:10:18 +00:00
Austin Clements 3053788cac cmd/trace: add minimum mutator utilization (MMU) plot
This adds an endpoint to the trace tool that plots the minimum mutator
utilization curve using information on mark assists and GC pauses from
the trace.

This commit implements a fairly straightforward O(nm) algorithm for
computing the MMU (and tests against an even more direct but slower
algorithm). Future commits will extend and optimize this algorithm.

This should be useful for debugging and understanding mutator
utilization issues like #14951, #14812, #18155. #18534, #21107,
particularly once follow-up CLs add trace cross-referencing.

Change-Id: Ic2866869e7da1e6c56ba3e809abbcb2eb9c4923a
Reviewed-on: https://go-review.googlesource.com/c/60790
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
2018-11-05 19:10:04 +00:00
Brad Fitzpatrick 3813edf26e all: use "reports whether" consistently in the few places that didn't
Go documentation style for boolean funcs is to say:

    // Foo reports whether ...
    func Foo() bool

(rather than "returns true if")

This CL also replaces 4 uses of "iff" with the same "reports whether"
wording, which doesn't lose any meaning, and will prevent people from
sending typo fixes when they don't realize it's "if and only if". In
the past I think we've had the typo CLs updated to just say "reports
whether". So do them all at once.

(Inspired by the addition of another "returns true if" in CL 146938
in fd_plan9.go)

Created with:

$ perl -i -npe 's/returns true if/reports whether/' $(git grep -l "returns true iff" | grep -v vendor)
$ perl -i -npe 's/returns true if/reports whether/' $(git grep -l "returns true if" | grep -v vendor)

Change-Id: Ided502237f5ab0d25cb625dbab12529c361a8b9f
Reviewed-on: https://go-review.googlesource.com/c/147037
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2018-11-02 22:47:58 +00:00
Peter Weinberger 08816cb8d7 cmd/trace: use new traceparser to parse the raw trace files
Change-Id: I8b224ae48a2f8acd5a64c9ff283e97821479a9a8
Reviewed-on: https://go-review.googlesource.com/c/145457
Run-TryBot: Peter Weinberger <pjw@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
2018-10-30 16:43:38 +00:00
Brad Fitzpatrick da0d1a44ba all: use strings.ReplaceAll and bytes.ReplaceAll where applicable
I omitted vendor directories and anything necessary for bootstrapping.
(Tested by bootstrapping with Go 1.4)

Updates #27864

Change-Id: I7d9b68d0372d3a34dee22966cca323513ece7e8a
Reviewed-on: https://go-review.googlesource.com/137856
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2018-09-26 22:14:25 +00:00
Hana Kim e57f24ab39 cmd/trace: don't drop sweep slice details
For sweep events, we used to modify the ViewerEvent returned from
ctx.emitSlice later in order to embed more details about the sweep
operation. The trick no longer works after the change
https://golang.org/cl/92375 and caused a regression.

ctx.emit method encodes the ViewerEvent, so any modification to the
ViewerEvent object after ctx.emit returns will not be reflected.

Refactor ctx.emitSlice, so ctx.makeSlice can be used when producing
slices for SWEEP. ctx.emit* methods are meant to truely emit
ViewerEvents.

Fixes #27711

Change-Id: I0b733ebbbfd4facd8714db0535809ec3cab0833d
Reviewed-on: https://go-review.googlesource.com/135775
Reviewed-by: Austin Clements <austin@google.com>
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2018-09-17 19:38:10 +00:00
Alex Kohler 31389254de all: fix typos
Change-Id: Icded6c786b7b185d5aff055f34e0cfe9e521826a
Reviewed-on: https://go-review.googlesource.com/132176
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-08-30 15:41:29 +00:00
Kazuhiro Sera ad644d2e86 all: fix typos detected by github.com/client9/misspell
Change-Id: Iadb3c5de8ae9ea45855013997ed70f7929a88661
GitHub-Last-Rev: ae85bcf82b
GitHub-Pull-Request: golang/go#26920
Reviewed-on: https://go-review.googlesource.com/128955
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2018-08-23 15:54:07 +00:00
Richard Musiol e083dc6307 runtime, sycall/js: add support for callbacks from JavaScript
This commit adds support for JavaScript callbacks back into
WebAssembly. This is experimental API, just like the rest of the
syscall/js package. The time package now also uses this mechanism
to properly support timers without resorting to a busy loop.

JavaScript code can call into the same entry point multiple times.
The new RUN register is used to keep track of the program's
run state. Possible values are: starting, running, paused and exited.
If no goroutine is ready any more, the scheduler can put the
program into the "paused" state and the WebAssembly code will
stop running. When a callback occurs, the JavaScript code puts
the callback data into a queue and then calls into WebAssembly
to allow the Go code to continue running.

Updates #18892
Updates #25506

Change-Id: Ib8701cfa0536d10d69bd541c85b0e2a754eb54fb
Reviewed-on: https://go-review.googlesource.com/114197
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-06-14 21:50:53 +00:00
Daniel Martí 64a832debe cmd/trace: fix a few bugs found by staticcheck
First, the regions sort was buggy, as its last comparison was
ineffective.

Second, the insyscall and insyscallRuntime fields were unsigned, so the
check for them being negative was pointless. Make them signed instead,
to also prevent the possibility of underflows when decreasing numbers
that might realistically be 0.

Third, the color constants were all untyped strings except the first
one. Be consistent with their typing.

Change-Id: I4eb8d08028ed92589493c2a4b9cc5a88d83f769b
Reviewed-on: https://go-review.googlesource.com/113895
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2018-05-21 16:18:29 +00:00
Hana (Hyang-Ah) Kim 43b18f4241 cmd/trace: handle invalid goid para in /trace
Change-Id: I1cb7c8b70a5ae16386f6abb577c23d821f7ff7f0
Reviewed-on: https://go-review.googlesource.com/112197
Reviewed-by: Peter Weinberger <pjw@google.com>
Run-TryBot: Hyang-Ah Hana Kim <hyangah@gmail.com>
2018-05-08 19:25:01 +00:00
Hana (Hyang-Ah) Kim 9eface7077 cmd/trace: skip links for buckets with 0 count
Change-Id: Ib1c2f7cc8e8f631ed9e74161699332f492d4cb0d
Reviewed-on: https://go-review.googlesource.com/112196
Reviewed-by: Peter Weinberger <pjw@google.com>
2018-05-08 19:24:56 +00:00