Commit Graph

257 Commits

Author SHA1 Message Date
Tobias Klauser 54b251f542 lib/time, time/tzdata: update tzdata to 2021a
Changelog:

  South Sudan changes from +03 to +02 on 2021-02-01 at 00:00.

Release announcement:

  http://mm.icann.org/pipermail/tz-announce/2021-January/000065.html

Updates #22487

Change-Id: Ia0a1a7a8f5d47adac9782bc2a445f69e02440f77
Reviewed-on: https://go-review.googlesource.com/c/go/+/285719
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Alberto Donizetti <alb.donizetti@gmail.com>
2021-01-25 16:08:46 +00:00
Brad Fitzpatrick 50cba0506f time: clarify Timer.Reset behavior on AfterFunc Timers
Fixes #28100

Change-Id: I37d4d7badf455e4ecf982d4fc7cb070052de2e45
Reviewed-on: https://go-review.googlesource.com/c/go/+/285632
Trust: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-01-22 14:50:17 +00:00
Alberto Donizetti 20d0991b86 lib/time, time/tzdata: update tzdata to 2020f
Changelog

 'make rearguard_tarballs' no longer generates a bad rearguard.zi,
 fixing a 2020e bug.

No actual changes to timezones data. See

  http://mm.icann.org/pipermail/tz-announce/2020-December/000064.html

Updates #22487

Change-Id: I78f7adba1c3c1d3489b0da870601117b9b8cb0d3
Reviewed-on: https://go-review.googlesource.com/c/go/+/280455
Trust: Alberto Donizetti <alb.donizetti@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
2020-12-30 22:51:30 +00:00
Alberto Donizetti d1502b3c72 lib/time, time/tzdata: update tzdata to 2020e
Changelog:

  Volgograd switches to Moscow time on 2020-12-27 at 02:00.
  Small changes to past timestamps and abbreviations.

See

  http://mm.icann.org/pipermail/tz-announce/2020-December/000063.html

Updates #22487

Change-Id: I709abe899ca498698463e945ccbcf4bc5fe60b92
Reviewed-on: https://go-review.googlesource.com/c/go/+/279794
Trust: Alberto Donizetti <alb.donizetti@gmail.com>
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2020-12-23 17:29:16 +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
Michael Pratt b78b427be5 runtime, time: strictly enforce when, period constraints
timer.when must always be positive. addtimer and modtimer already check
that it is non-negative; we expand it to include zero. Also upgrade from
pinning bad values to throwing, as these values shouldn't be possible to
pass (except as below).

timeSleep may overflow timer.nextwhen. This would previously have been
pinned by resetForSleep, now we fix it manually.

runOneTimer may overflow timer.when when adding timer.period. Detect
this and pin to maxWhen.

addtimer is now too strict to allow TestOverflowRuntimeTimer to test an
overflowed timer. Such a timer should not be possible; to help guard
against accidental inclusion siftup / siftdown will check timers as it
goes. This has been replaced with tests for period and sleep overflows.

Change-Id: I17f9739e27ebcb20d87945c635050316fb8e9226
Reviewed-on: https://go-review.googlesource.com/c/go/+/274853
Trust: Michael Pratt <mpratt@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2020-12-03 21:23:16 +00:00
Michael Pratt b635e4b808 time, runtime: don't set timer when = 0
timer when == 0, in the context of timer0When and timerModifiedEarliest,
is a sentinel value meaning there are no timers on the heap.
TestCheckRuntimeTimerOverflow reaching into the runtime to set a timer
to when = 0 when it is otherwise not possible breaks this invariant.

After golang.org/cl/258303, we will no longer detect and run this timer,
thus blocking any other timers lower on the heap from running. This
manifests as random timers failing to fire in other tests.

The need to set this overflowed timer to when = 0 is gone with the old
timer proc implementation, so we can simply remove it.

Fixes #42424

Change-Id: Iea32100136ad8ec1bedfa77b1e7d9ed868812838
Reviewed-on: https://go-review.googlesource.com/c/go/+/274632
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Michael Pratt <mpratt@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Michael Pratt <mpratt@google.com>
2020-12-03 21:21:23 +00:00
Alberto Donizetti bcfaeca58c time: in NewTicker, document that the 1st tick comes after d
Fixes #42245

Change-Id: I3b298ab6be65569389873d68bd3c6e49cf892c69
Reviewed-on: https://go-review.googlesource.com/c/go/+/265818
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
Trust: Alberto Donizetti <alb.donizetti@gmail.com>
2020-11-18 04:43:50 +00:00
Christopher Hlubek 70e022e4a8 time: fix LoadLocationFromTZData with slim tzdata
The extend information of a time zone file with last transition < now
could result in a wrong cached zone because it used the zone of the
last transition.

This could lead to wrong zones in systems with slim zoneinfo.

Fixes #42216

Change-Id: I7c57c35b5cfa58482ac7925b5d86618c52f5444d
Reviewed-on: https://go-review.googlesource.com/c/go/+/264939
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2020-10-27 23:36:05 +00:00
Chris Hines 8fdc79e18a runtime: reduce timer latency
Change the scheduler to treat expired timers with the same approach it
uses to steal runnable G's.

Previously the scheduler ignored timers on P's not marked for
preemption. That had the downside that any G's waiting on those expired
timers starved until the G running on their P completed or was
preempted. That could take as long as 20ms if sysmon was in a 10ms
wake up cycle.

In addition, a spinning P that ignored an expired timer and found no
other work would stop despite there being available work, missing the
opportunity for greater parallelism.

With this change the scheduler no longer ignores timers on
non-preemptable P's or relies on sysmon as a backstop to start threads
when timers expire. Instead it wakes an idle P, if needed, when
creating a new timer because it cannot predict if the current P will
have a scheduling opportunity before the new timer expires. The P it
wakes will determine how long to sleep and block on the netpoller for
the required time, potentially stealing the new timer when it wakes.

This change also eliminates a race between a spinning P transitioning
to idle concurrently with timer creation using the same pattern used
for submission of new goroutines in the same window.

Benchmark analysis:

CL 232199, which was included in Go 1.15 improved timer latency over Go
1.14 by allowing P's to steal timers from P's not marked for preemption.
The benchmarks added in this CL measure that improvement in the
ParallelTimerLatency benchmark seen below. However, Go 1.15 still relies
on sysmon to notice expired timers in some situations and sysmon can
sleep for up to 10ms before waking to check timers. This CL fixes that
shortcoming with modest regression on other benchmarks.

name \ avg-late-ns                                        go14.time.bench  go15.time.bench  fix.time.bench
ParallelTimerLatency-8                                         17.3M ± 3%        7.9M ± 0%       0.2M ± 3%
StaggeredTickerLatency/work-dur=300µs/tickers-per-P=1-8        53.4k ±23%       50.7k ±31%     252.4k ± 9%
StaggeredTickerLatency/work-dur=300µs/tickers-per-P=2-8         204k ±14%         90k ±58%       188k ±12%
StaggeredTickerLatency/work-dur=300µs/tickers-per-P=3-8        1.17M ± 0%       0.11M ± 5%      0.11M ± 2%
StaggeredTickerLatency/work-dur=300µs/tickers-per-P=4-8        1.81M ±44%       0.10M ± 4%      0.10M ± 2%
StaggeredTickerLatency/work-dur=300µs/tickers-per-P=5-8        2.28M ±66%       0.09M ±13%      0.08M ±21%
StaggeredTickerLatency/work-dur=300µs/tickers-per-P=6-8        2.84M ±85%       0.07M ±15%      0.07M ±18%
StaggeredTickerLatency/work-dur=300µs/tickers-per-P=7-8        2.13M ±27%       0.06M ± 4%      0.06M ± 9%
StaggeredTickerLatency/work-dur=300µs/tickers-per-P=8-8        2.63M ± 6%       0.06M ±11%      0.06M ± 9%
StaggeredTickerLatency/work-dur=300µs/tickers-per-P=9-8        3.32M ±17%       0.06M ±16%      0.07M ±14%
StaggeredTickerLatency/work-dur=300µs/tickers-per-P=10-8       8.46M ±20%       4.37M ±21%      5.03M ±23%
StaggeredTickerLatency/work-dur=2ms/tickers-per-P=1-8          1.02M ± 1%       0.20M ± 2%      0.20M ± 2%

name \ max-late-ns                                        go14.time.bench  go15.time.bench  fix.time.bench
ParallelTimerLatency-8                                         18.3M ± 1%        8.2M ± 0%       0.5M ±12%
StaggeredTickerLatency/work-dur=300µs/tickers-per-P=1-8         141k ±19%        127k ±19%      1129k ± 3%
StaggeredTickerLatency/work-dur=300µs/tickers-per-P=2-8        2.78M ± 4%       1.23M ±15%      1.26M ± 5%
StaggeredTickerLatency/work-dur=300µs/tickers-per-P=3-8        6.05M ± 5%       0.67M ±56%      0.81M ±33%
StaggeredTickerLatency/work-dur=300µs/tickers-per-P=4-8        7.93M ±20%       0.71M ±46%      0.76M ±41%
StaggeredTickerLatency/work-dur=300µs/tickers-per-P=5-8        9.41M ±30%       0.92M ±23%      0.81M ±44%
StaggeredTickerLatency/work-dur=300µs/tickers-per-P=6-8        10.8M ±42%        0.8M ±41%       0.8M ±30%
StaggeredTickerLatency/work-dur=300µs/tickers-per-P=7-8        9.62M ±24%       0.77M ±38%      0.88M ±27%
StaggeredTickerLatency/work-dur=300µs/tickers-per-P=8-8        10.6M ±10%        0.8M ±32%       0.7M ±27%
StaggeredTickerLatency/work-dur=300µs/tickers-per-P=9-8        11.9M ±36%        0.6M ±46%       0.8M ±38%
StaggeredTickerLatency/work-dur=300µs/tickers-per-P=10-8       36.8M ±21%       24.7M ±21%      27.5M ±16%
StaggeredTickerLatency/work-dur=2ms/tickers-per-P=1-8          2.12M ± 2%       1.02M ±11%      1.03M ± 7%

Other time benchmarks:
name \ time/op          go14.time.bench  go15.time.bench  fix.time.bench
AfterFunc-8                  137µs ± 4%       123µs ± 4%      131µs ± 2%
After-8                      212µs ± 3%       195µs ± 4%      204µs ± 7%
Stop-8                       165µs ± 6%       156µs ± 2%      151µs ±12%
SimultaneousAfterFunc-8      260µs ± 3%       248µs ± 3%      284µs ± 2%
StartStop-8                 65.8µs ± 9%      64.4µs ± 7%     67.3µs ±15%
Reset-8                     13.6µs ± 2%       9.6µs ± 2%      9.1µs ± 4%
Sleep-8                      307µs ± 4%       306µs ± 3%      320µs ± 2%
Ticker-8                    53.0µs ± 5%      54.5µs ± 5%     57.0µs ±11%
TickerReset-8                                9.24µs ± 2%     9.51µs ± 3%
TickerResetNaive-8                            149µs ± 5%      145µs ± 5%

Fixes #38860
Updates #25471
Updates #27707

Change-Id: If52680509b0f3b66dbd1d0c13fa574bd2d0bbd57
Reviewed-on: https://go-review.googlesource.com/c/go/+/232298
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
Trust: Ian Lance Taylor <iant@golang.org>
2020-10-27 17:24:42 +00:00
Tobias Klauser fe5f95eecc lib/time, time/tzdata: update tz data to 2020d
See http://mm.icann.org/pipermail/tz-announce/2020-October/000060.html
and http://mm.icann.org/pipermail/tz-announce/2020-October/000062.html
for a description of the changes.

Updates #22487

Change-Id: I4b2717d2d642284889345a0125eb6c614575c0ea
Reviewed-on: https://go-review.googlesource.com/c/go/+/264681
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2020-10-24 21:42:44 +00:00
subham sarkar a972e8ccb9 all: fix quoting for compress/bzip2 and time's godoc
The existing usage of grave accent (`) and apostrophe (')
at some places made godoc to ignore them and show it as it is.
So, use both of the characters twice (consecutively) so that
godoc can convert it to {left,right} double quotation mark.

Fixes #41958

Change-Id: I64fd9b5fa34f416ad595009d09f5482e10bd8b4f
Reviewed-on: https://go-review.googlesource.com/c/go/+/262397
Reviewed-by: Russ Cox <rsc@golang.org>
Trust: Alberto Donizetti <alb.donizetti@gmail.com>
2020-10-23 21:57:39 +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
Tobias Klauser d83168eb38 lib/time, time, time/tzdata: use slim tz data format
Follow-up for CL 261363 which had to retain the fat tz data format due
to failing test.

The reason for the failed tests was that when caching location data, the
extended time format past the end of zone transitions was not
considered. The respective change was introduced in (*Location).lookup
by CL 215539.

This slims down zoneinfo.zip (and thus also the embedded copy in
time/tzdata) by ~350KB.

Change-Id: I412f79de98ba45358b8696aca784999b3479135e
Reviewed-on: https://go-review.googlesource.com/c/go/+/261877
Trust: Tobias Klauser <tobias.klauser@gmail.com>
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TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2020-10-14 09:00:41 +00:00
Tobias Klauser 5b509d993d lib/time, time/tzdata: update tz data to 2020b
Set ZFLAGS="-b fat" as the default was changed to '-b slim', see
http://mm.icann.org/pipermail/tz-announce/2020-October/000059.html
This will make sure that backwards-compatibibilty data is still emitted.

Updates #22487

Change-Id: I310a1b3a91e435673d1df41fbf8bb76abce1f94d
Reviewed-on: https://go-review.googlesource.com/c/go/+/261363
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2020-10-13 08:36:41 +00:00
Russ Cox 84f3b33f10 syscall: remove dependency on io
Keep syscall and io separated; neither should depend on the other.

Change-Id: Icdd61bd0c05d874cabd7b5ae6631dd09dec90112
Reviewed-on: https://go-review.googlesource.com/c/go/+/243902
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>
Reviewed-by: Rob Pike <r@golang.org>
2020-10-13 00:55:35 +00:00
Tobias Klauser 027367ac50 time: add ios build constraint to zoneinfo_ios.go
This allows to build the time package using a Go version which doesn't
know GOOS=ios yet.

Change-Id: Ib1b00687432f3309bac8fd8bf5c02b9c62f049a7
Reviewed-on: https://go-review.googlesource.com/c/go/+/261362
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2020-10-12 22:34:47 +00:00
Cherry Zhang 83dfc0d02d time: enable system zoneinfo on macOS/ARM64
Updates #38485.

Change-Id: I4a8b509dc4ad03706235289fbe8c2a675453c871
Reviewed-on: https://go-review.googlesource.com/c/go/+/260339
Trust: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2020-10-07 20:07:07 +00:00
Cherry Zhang a413908dd0 all: add GOOS=ios
Introduce GOOS=ios for iOS systems. GOOS=ios matches "darwin"
build tag, like GOOS=android matches "linux" and GOOS=illumos
matches "solaris". Only ios/arm64 is supported (ios/amd64 is
not).

GOOS=ios and GOOS=darwin remain essentially the same at this
point. They will diverge at later time, to differentiate macOS
and iOS.

Uses of GOOS=="darwin" are changed to (GOOS=="darwin" || GOOS=="ios"),
except if it clearly means macOS (e.g. GOOS=="darwin" && GOARCH=="amd64"),
it remains GOOS=="darwin".

Updates #38485.

Change-Id: I4faacdc1008f42434599efb3c3ad90763a83b67c
Reviewed-on: https://go-review.googlesource.com/c/go/+/254740
Trust: Cherry Zhang <cherryyz@google.com>
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TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
2020-09-23 18:12:59 +00:00
Jay Lee 58fe2cd402 time: support colon at start of TZ value
According to POSIX, there are three formats for TZ variable. When
it refers to timezone file, it should starts with a colon. This commit
removes the colon if it exists, so that it keeps compatible with both
the spec and the old behavior.

Change-Id: I30cfeaea530d24e174de309952338cb1146694a5
GitHub-Last-Rev: 11d83d11ca
GitHub-Pull-Request: golang/go#27570
Reviewed-on: https://go-review.googlesource.com/c/go/+/134217
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Dmitri Shuralyov <dmitshur@golang.org>
2020-09-19 05:19:50 +00:00
David Golden a9cc1051c1 time: note that formats may parse invalid strings
The existing documentation for time format constants doesn't mention
that they may parse technically-invalid strings, such as single-digit
hours when a two-digit hour is required by a specification.  This commit
adds a short warning note to that effect.

Fixes #37616

Change-Id: I6e5e12bd42dc368f8ca542b4c0527a2b7d30acaf
Reviewed-on: https://go-review.googlesource.com/c/go/+/229460
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2020-06-02 22:20:47 +00:00
Tobias Klauser 4abec2a480 runtime, time: gofmt
Change-Id: Ib36a5f239db5af497aae122eba049c15d0d4c4a8
Reviewed-on: https://go-review.googlesource.com/c/go/+/235139
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2020-05-26 22:06:26 +00:00
Russ Cox 9acdc705e7 time: simplify Duration.String example
The existing example is needlessly complex.
You have to know that t.Sub returns a Duration
and also have to mentally subtract the two times
to understand what duration should be printed.

Rewrite to focus on just the Duration.String operation.

Change-Id: I00765b6019c07a6ff03022625b556c2b9ba87c09
Reviewed-on: https://go-review.googlesource.com/c/go/+/234893
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2020-05-22 11:28:55 +00:00
Tobias Klauser 5c9a8c0761 lib/time, time/tzdata: update tz data to 2020a
Updates #22487

Change-Id: I691b4c8ced7bfb368f46ade0be46b2ab3f1820dd
Reviewed-on: https://go-review.googlesource.com/c/go/+/230360
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2020-04-30 08:07:39 +00:00
Ian Lance Taylor b71eafbcec time: use extended time format past end of zone transitions
This gives us better expected information for daylight savings time
transitions in year 2038 and beyond.

Fixes #36654

Change-Id: I5a39aed3c40b184e1d7bb7d6ce3aff5307c4c146
Reviewed-on: https://go-review.googlesource.com/c/go/+/215539
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2020-04-22 04:08:24 +00:00
Ian Lance Taylor ab31e2749f time/tzdata: new package
Importing the time/tzdata package will embed a copy of the IANA
timezone database into the program. This will let the program work
correctly when the timezone database is not available on the system.
It will increase the size of the binary by about 800K.

You can also build a program with -tags timetzdata to embed the
timezone database in the program being built.

This is a roll forward of CL 224588 which was rolled back due to
test failures. In this version, the test is in the time package,
not the time/tzdata package. That lets us compare the zip file
to the time/tzdata package, ensuring that we are looking at similar
versions of tzdata information.

Fixes #21881
Fixes #38013
Fixes #38017

Change-Id: I916d9d8473abe201b897cdc2bbd9168df4ad671c
Reviewed-on: https://go-review.googlesource.com/c/go/+/228101
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
2020-04-14 19:34:31 +00:00
Obeyda Djeffal 201cb046b7 time: quote original value in errors returned by ParseDuration
Quote original values passed as substring of ParseError.Message.
Improves the user experience of ParseDuration by making it
quote its original argument, for example:

   _, err := time.ParseDuration("for breakfast")
 will now produce an error, which when printed out is:

  time: invalid duration "for breakfast"
 instead of:

  time: invalid duration for breakfast

Adapt test cases for format.Parse and format.ParseDuration.

Fixes #38295

Change-Id: Ife322c8f3c859e1e4e8dd546d4cf0d519b4bfa81
Reviewed-on: https://go-review.googlesource.com/c/go/+/227878
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2020-04-14 00:01:14 +00:00
Ian Lance Taylor 5a706d163d Revert "time/tzdata: new package"
This reverts CL 224588.

Reason for revert: Test failing on secondary platforms.

Change-Id: Ic15fdc73a0d2b860e776733abb82c58809e13160
Reviewed-on: https://go-review.googlesource.com/c/go/+/228200
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2020-04-13 23:27:02 +00:00
Ian Lance Taylor 6d63a74f8e time/tzdata: new package
Importing the time/tzdata package will embed a copy of the IANA
timezone database into the program. This will let the program work
correctly when the timezone database is not available on the system.
It will increase the size of the binary by about 800K.

You can also build a program with -tags timetzdata to embed the
timezone database in the program being built.

Fixes #21881
Fixes #38013
Fixes #38017

Change-Id: Iffddee72a8f46c95fee3bcde43c142d6899d9246
Reviewed-on: https://go-review.googlesource.com/c/go/+/224588
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
2020-04-13 21:01:56 +00:00
Austin Clements 8b4cbcc320 all: remove darwin/386 build-tags and files
This removes all files that are only used on darwin/386 and cleans up
build tags in files that are still used on other platforms.

Updates #37610.

Change-Id: If246642476c12d15f59a474e2b91a29c0c02fe75
Reviewed-on: https://go-review.googlesource.com/c/go/+/227581
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2020-04-08 18:37:36 +00:00
Austin Clements da8591b61c all: remove darwin/arm build-tags and files
This removes all files that are only used on darwin/arm and cleans up
build tags in files that are still used on other platforms.

Updates #37611.

Change-Id: Ic9490cf0edfc157c6276a7ca950c1768b34a998f
Reviewed-on: https://go-review.googlesource.com/c/go/+/227197
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2020-04-08 18:35:43 +00:00
Ian Lance Taylor 5f3354d1bf time, runtime: only call resetTimer from (*Timer).Reset
Previously we stopped the timer and then reset it. With the current
timer implementation that is no longer required.

Change-Id: Ie7aba61ad53ce835f6fcd0b6bce7fe0a15b10e24
Reviewed-on: https://go-review.googlesource.com/c/go/+/227180
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
2020-04-06 03:35:33 +00:00
PetarDambovaliev d99fe1f40d time: remove some unnecessary/duplicated global slices
Removes two variables:

- days which is unused, and similar usage provided by longDayNames
- months in favour of using longMonthNames

Fixes #36359

Change-Id: I51b6b7408db9359c658462ba73e59ed432f655a6
GitHub-Last-Rev: 778d3ea157
GitHub-Pull-Request: golang/go#36372
Reviewed-on: https://go-review.googlesource.com/c/go/+/213177
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2020-03-28 08:33:16 +00:00
Paschalis Tsilias ff1eb42865 time: fix time.Before to reuse t.sec(), u.sec()
Fixes #36987

Change-Id: I91ea1a42f75302de5256a22d382ab7f1b307a498
Reviewed-on: https://go-review.googlesource.com/c/go/+/217360
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2020-03-16 20:59:27 +00:00
Ian Lance Taylor 85e87f9d81 time: stop referring to timerproc in comment
The timerproc function has been removed.

Fixes #37774

Change-Id: Ice5e1d8fec91cd6ee7f032e0d21e8315a26bc6a3
Reviewed-on: https://go-review.googlesource.com/c/go/+/222783
Reviewed-by: Alberto Donizetti <alb.donizetti@gmail.com>
2020-03-13 00:19:08 +00:00
Jean de Klerk 4978f5e6ea time: use values larger than 24 for day for time.Format examples
Currently, the time.Format docs use 7 Mar 2015 as the day/month/year. In numeric
form, that is either 7/3/2015 or 3/7/2015 depending on which part of the world
you're from. This is extremely confusing.

In fact, the reference time being defined in a very US-centric way is quite
confusing for the rest of the world, too [1].

We can't change that, but we can make the time.Format docs more comprehendable
to the rest of the world without sacrificing by simply choosing a day that is
not ambiguous (a value greater than 24 for day). This CL does makes the
necessary change.

Note: this CL moves some of the padding examples into their own example, since
those examples do need a <10 day to demonstrate padding.

1: Additional context: a very old golang-nuts thread in which Rob expresses some
regret about the format being the USA standard, rather than the alternative:
https://groups.google.com/forum/m/#!msg/golang-nuts/0nQbfyNzk9E/LWbMgpRQNOgJ.

Change-Id: If0a07c5e0dab86f8420cbf59543405eb857aa7f2
Reviewed-on: https://go-review.googlesource.com/c/go/+/221612
Run-TryBot: Jean de Klerk <deklerk@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
2020-03-02 04:25:41 +00:00
Shuo 91bc75b487 time: optimize Time.ISOWeek
name       old time/op  new time/op  delta
ISOWeek-4  57.7ns ± 5%  27.9ns ±10%  -51.54%  (p=0.000 n=48+49)

Fixes #37534

Change-Id: Ic4673ced44a4b0190018e87207743ed9500fb1e0
GitHub-Last-Rev: a376c57e83
GitHub-Pull-Request: golang/go#36316
Reviewed-on: https://go-review.googlesource.com/c/go/+/212837
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2020-03-01 02:56:31 +00:00
Ian Lance Taylor 98858c4380 runtime: don't panic on racy use of timers
If we see a racy use of timers, as in concurrent calls to Timer.Reset,
do the operations in an unpredictable order, rather than crashing.

Fixes #37400

Change-Id: Idbac295df2dfd551b6d762909d5040fc532c1b34
Reviewed-on: https://go-review.googlesource.com/c/go/+/221077
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
2020-02-27 02:37:10 +00:00
Jean de Klerk 0d4fa27fd7 time: add basic YYYY/MM/DD example to time docs
This is a _very_ common question [1]. Let's just make an example for it.

1: https://www.google.com/search?q=golang+yyyy-mm-dd&oq=golang+yyyy-mm-dd&aqs=chrome..69i57j0l4j69i64l3.6015j0j7&sourceid=chrome&ie=UTF-8

Change-Id: I32ae689b91018d326f31a2442a1beaf68dddf13c
Reviewed-on: https://go-review.googlesource.com/c/go/+/220595
Run-TryBot: Jean de Klerk <deklerk@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2020-02-25 04:34:15 +00:00
Changkun Ou 402ea9e4f9 time: add Ticker.Reset
This CL implements Ticker.Reset method in time package.

Benchmark:
name                 time/op
TickerReset-12       6.41µs ±10%
TickerResetNaive-12  95.7µs ±12%

Fixes #33184

Change-Id: I4cbd31796efa012b2a297bb342158f11a4a31fef
Reviewed-on: https://go-review.googlesource.com/c/go/+/220424
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2020-02-24 01:50:28 +00:00
Ian Lance Taylor 5bd145413a time: don't get confused about day 31 when parsing 002
The 002 parsing code had a bug that mishandled day 31.

Fixes #37387

Change-Id: Ia5a492a4ddd09a4bc232ce9582aead42d5099bdd
Reviewed-on: https://go-review.googlesource.com/c/go/+/220637
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
2020-02-23 18:06:08 +00:00
Andrew Bonventre b0863ce0e6 Revert "time: add Ticker.Reset"
This reverts CL 217362 (6e5652bebede2d53484a872f6d1dfeb498b0b50c.)

Reason for revert: Causing failures on arm64 bots. See #33184 for more info

Change-Id: I72ba40047e4138767d95aaa68842893c3508c52f
Reviewed-on: https://go-review.googlesource.com/c/go/+/220638
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2020-02-23 17:58:14 +00:00
Changkun Ou 6e5652bebe time: add Ticker.Reset
This CL implements Ticker.Reset method in time package.

Benchmark:
name                 time/op
TickerReset-12       6.41µs ±10%
TickerResetNaive-12  95.7µs ±12%

Fixes #33184

Change-Id: I12c651f81e452541bcbbc748b45f038aae1f8dae
Reviewed-on: https://go-review.googlesource.com/c/go/+/217362
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2020-02-23 16:09:02 +00:00
Ian Lance Taylor f9c51e353f time: remove unnecessary trailing slash from "/etc/"
Fixes #36640

Change-Id: I2049b572347da1cb967f5a3f2bc342b310216435
Reviewed-on: https://go-review.googlesource.com/c/go/+/215519
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2020-02-22 04:31:20 +00:00
Kirill Tatchihin 8453844ed7 time: document how Parse handles two-digit years
Fixes #36549

Change-Id: Ia803330fc046d5807bbefd67acb419cb81640a13
GitHub-Last-Rev: bd35431908
GitHub-Pull-Request: golang/go#36584
Reviewed-on: https://go-review.googlesource.com/c/go/+/214980
Reviewed-by: Rob Pike <r@golang.org>
2020-01-23 20:44:44 +00:00
Rob Pike 4ead7e8cc4 time: add a sentence about distant times to time.Time.Unix
Since Durations only span 290 years, they are not good for
manipulating very remote times. I bounced off this problem recently
while doing some astronomical calculations and it took me a while to
realize I could get a 64-bit seconds value from time.Time.Unix and
subtract two of them to evaluate the interval.

I thought it worth adding a sentence to make this clear. It didn't
occur to me for quite a while that "Unix time" spans a huge range in
the Go library.

Change-Id: I76c75dc951dfd6bcf86e8b0be3cfec518a3ecdee
Reviewed-on: https://go-review.googlesource.com/c/go/+/213977
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Andrew Gerrand <adg@golang.org>
2020-01-13 21:56:50 +00:00
Emmanuel T Odeke f376b8510e all: fix invalid invocations of Fatalf in goroutines
Found by running the go vet pass 'testinggoroutine' that
I started in CL 212920.

Change-Id: Ic9462fac85dbafc437fe4a323b886755a67a1efa
Reviewed-on: https://go-review.googlesource.com/c/go/+/213097
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2020-01-03 01:36:26 +00:00
Ian Lance Taylor 001fe7f33f time: further clarifications to the (*Timer).Stop docs
Fixes #35627

Change-Id: I0c5fed46a69a9663e46a9414468ec610063ea05a
Reviewed-on: https://go-review.googlesource.com/c/go/+/207849
Reviewed-by: Rob Pike <r@golang.org>
2019-12-17 00:18:33 +00:00
Xudong Zhang 3edd1d8d99 time: fix comment in test
The commit de36d1 (CL 4635083) changed the test time
from 2009 to 2010 but forgot to update the comment.

Change-Id: Ia2928773dd184f168fddde126d0bb936de8cfc29
GitHub-Last-Rev: bf8eb57140
GitHub-Pull-Request: golang/go#35930
Reviewed-on: https://go-review.googlesource.com/c/go/+/209517
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2019-12-02 16:11:24 +00:00
Ian Lance Taylor 96c9f3aa00 time: give TestTicker more time on darwin-arm64
The darwin-arm64-correlium builder was failing the test consistently
at the old values. Give the ticks more time to let the test pass.

Updates #35692

Change-Id: Ibc636cd4db2595c82f4e8c6c822c3df4c2b7e0a1
Reviewed-on: https://go-review.googlesource.com/c/go/+/207839
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2019-11-19 16:24:02 +00:00