This is a copy of the "FANOUT" benchmark recently added to RE2 with the
following comment:
// This has quite a high degree of fanout.
// NFA execution will be particularly slow.
Most of the benchmarks on the regexp package have very little fanout and
are designed for comparing the regexp package's NFA with backtracking
engines found in other regular expression libraries. This benchmark
exercises the performance of the NFA on expressions with high fanout.
Change-Id: Ie9c8e3bbeffeb1fe9fb90474ddd19e53f2f57a52
Reviewed-on: https://go-review.googlesource.com/24846
Reviewed-by: Andrew Gerrand <adg@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
A follow-on to https://golang.org/cl/24852 that mentions the
documentation clarifications.
Updates #16308.
Change-Id: Ic2a6e1d4938d74352f93a6649021fb610efbfcd0
Reviewed-on: https://go-review.googlesource.com/24857
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
There are no synchronization points protecting the readVal and readPos
variables. This leads to a race when Read is called concurrently.
Fix this by adding methods to lockedSource, which is the case where
a race matters.
Fixes#16308.
Change-Id: Ic028909955700906b2d71e5c37c02da21b0f4ad9
Reviewed-on: https://go-review.googlesource.com/24852
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
For better or for worse, it's IsExist, not IsExists.
Change-Id: I4503f961486edd459c0c81cf3f32047dff7703a4
Reviewed-on: https://go-review.googlesource.com/24819
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
In the beta version of the macOS Sierra (10.12) release, the
gettimeofday system call changed on x86. Previously it always returned
the time in the AX/DX registers. Now, if AX is returned as 0, it means
that the system call has stored the values into the memory pointed to by
the first argument, just as the libc gettimeofday function does. The
libc function handles both cases, and we need to do so as well.
Fixes#16272.
Change-Id: Ibe5ad50a2c5b125e92b5a4e787db4b5179f6b723
Reviewed-on: https://go-review.googlesource.com/24812
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
The shrinkstack code locks all the channels a goroutine is waiting for,
but didn't handle the case of the same channel appearing in the list
multiple times. This led to a deadlock. The channels are sorted so it's
easy to avoid locking the same channel twice.
Fixes#16286.
Change-Id: Ie514805d0532f61c942e85af5b7b8ac405e2ff65
Reviewed-on: https://go-review.googlesource.com/24815
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
The test was checking for 1 of 2 possible error values. But based on
goroutine scheduling and the randomness of select statement receive
cases, it was possible for a 3rd type of error to be returned.
This modifies the code (not the test) to make that third type of error
actually the second type of error, which is a nicer error message.
The test is no longer flaky. The flake was very reproducible with a
5ms sleep before the select at the end of Transport.getConn.
Thanks to Github user @jaredborner for debugging.
Fixes#16049
Change-Id: I0d2a036c9555a8d2618b07bab01f28558d2b0b2c
Reviewed-on: https://go-review.googlesource.com/24748
Reviewed-by: Andrew Gerrand <adg@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Document explicitly which functions Clean the result rather than
documenting it in the package comment.
Updates #10122.
Fixes#16111.
Change-Id: Ia589c7ee3936c9a6a758725ac7f143054d53e41e
Reviewed-on: https://go-review.googlesource.com/24747
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This new comment can be used to declare that the uintptr arguments to a
function may be converted from pointers, and that those pointers should
be considered to escape. This is used for the Call methods in
dll_windows.go that take uintptr arguments, because they call Syscall.
We can't treat these functions as we do syscall.Syscall, because unlike
Syscall they may cause the stack to grow. For Syscall we can assume that
stack arguments can remain on the stack, but for these functions we need
them to escape.
Fixes#16035.
Change-Id: Ia0e5b4068c04f8d303d95ab9ea394939f1f57454
Reviewed-on: https://go-review.googlesource.com/24551
Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Fixes#8833
Change-Id: I4523a1de112ed02371504e27882659bce8028a45
Reviewed-on: https://go-review.googlesource.com/24745
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Fixes#16258.
Docs for Encode and EncodeValue do not mention that
nil pointers are not permitted hence we panic,
because Gobs encode values yet nil pointers have no value
to encode. It moves a comment that was internal to EncodeValue
to the top level to make it clearer to users what to expect
when they pass in nil pointers.
Supplements test TestTopLevelNilPointer.
Change-Id: Ie54f609fde4b791605960e088456047eb9aa8738
Reviewed-on: https://go-review.googlesource.com/24740
Reviewed-by: Andrew Gerrand <adg@golang.org>
Run-TryBot: Andrew Gerrand <adg@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Don't issue a copylock warning about a result type; the function may
return a composite literal with a zero value, which is OK.
Don't issue a copylock warning about a function call on the RHS, or an
indirection of a function call; the function may return a composite
literal with a zero value, which is OK.
Updates #16227.
Change-Id: I94f0e066bbfbca5d4f8ba96106210083e36694a2
Reviewed-on: https://go-review.googlesource.com/24711
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
The original intent of the code was to allow both with and without .git
suffix for now to allow a transition period. The noVCSSuffix check was a
copy pasta error.
Fixes#15979.
Change-Id: I3d39aba8d026b40fc445244d6d01d8bc1979d1e4
Reviewed-on: https://go-review.googlesource.com/24645
Reviewed-by: Ian Lance Taylor <iant@golang.org>
If we don't mark them as needzero, we have a live pointer variable
containing possible garbage, which will baffle the GC.
Fixes#16249.
Change-Id: I7c423ceaca199ddd46fc2c23e5965e7973f07584
Reviewed-on: https://go-review.googlesource.com/24715
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
The frontend may emit node with line number missing. In this case,
use the parent line number. Instead of changing every call site of
pushLine, do it in pushLine itself.
Fixes#16214.
Change-Id: I80390550b56e4d690fc770b01ff725b892ffd6dc
Reviewed-on: https://go-review.googlesource.com/24641
Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Updates x/net/http2 to git rev b400c2e for https://golang.org/cl/24214,
"http2: add additional blacklisted ciphersuites"
Both TLS_RSA_WITH_AES_128_GCM_SHA256 & TLS_RSA_WITH_AES_256_GCM_SHA384
are now blacklisted, per http://httpwg.org/specs/rfc7540.html#BadCipherSuites
Change-Id: I8b9a7f4dc3c152d0675e196523ddd36111744984
Reviewed-on: https://go-review.googlesource.com/24684
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
We had ~30 one way, and these four new occurrences the other way.
Updates #11626
Change-Id: Ic6403dc4905874916ae292ff739d33482ed8e5bf
Reviewed-on: https://go-review.googlesource.com/24683
Reviewed-by: Rob Pike <r@golang.org>
Previously we started checking for context cancelation in Wait, but
that meant that when using StdoutPipe context cancelation never took
effect.
Fixes#16222.
Change-Id: I89cd26d3499a6080bf1a07718ce38d825561899e
Reviewed-on: https://go-review.googlesource.com/24650
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This should fix the report at #16224, and also fixes running the test as
root on my Ubuntu Trusty system.
Fixes#16224.
Change-Id: I4e3b5527aa63366afb33a7e30efab088d34fb302
Reviewed-on: https://go-review.googlesource.com/24670
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
There was only one use of "HTTP/1.n" compared to "HTTP/1.x":
h2_bundle.go:// "Just as in HTTP/1.x, header field names are strings of ASCII
httputil/dump.go:// DumpRequest returns the given request in its HTTP/1.x wire
httputil/dump.go:// intact. HTTP/2 requests are dumped in HTTP/1.x form, not in their
response.go:// Write writes r to w in the HTTP/1.x server response format,
server.go: // Request.Body. For HTTP/1.x requests, handlers should read any
server.go:// The default HTTP/1.x and HTTP/2 ResponseWriter implementations
server.go:// The default ResponseWriter for HTTP/1.x connections supports
server.go:// http1ServerSupportsRequest reports whether Go's HTTP/1.x server
server.go: // about HTTP/1.x Handlers concurrently reading and writing, like
server.go: // HTTP/1.x from here on.
transport.go: return fmt.Errorf("net/http: HTTP/1.x transport connection broken: %v", err)
Be consistent.
Change-Id: I93c4c873e500f51af2b4762055e22f5487a625ac
Reviewed-on: https://go-review.googlesource.com/24610
Reviewed-by: Andrew Gerrand <adg@golang.org>
I believe it's necessary to use a buffer size smaller than 64KB because
(at least some versions of) Window using a TCP receive window less than
64KB. Currently the client and server use buffer sizes of 16KB and 32KB,
respectively (the server uses io.Copy, which defaults to 32KB internally).
Since the server has been using 32KB, it should be safe for the client to
do so as well.
Fixes#15899
Change-Id: I36d44b29f2a5022c03fc086213d3c1adf153e983
Reviewed-on: https://go-review.googlesource.com/24581
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
The assembly is broken: it does `MOVQ g(R12), R14` expecting that
R12 contains tls address, but it does not do get_tls(R12) before.
This magically works on linux: `MOVQ g(R12), R14` is compiled to
`mov %fs:0xfffffffffffffff8,%r14` which does not use R12.
But it crashes on windows.
Add explicit `get_tls(R12)`.
Fixes#16206
Change-Id: Ic1f21a6fef2473bcf9147de6646929781c9c1e98
Reviewed-on: https://go-review.googlesource.com/24590
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
When the blocked field was first introduced back in
https://golang.org/cl/61250043 the scheduler trace code incorrectly used
m->blocked instead of mp->blocked. That has carried through the
conversion to Go. This CL fixes it.
Change-Id: Id81907b625221895aa5c85b9853f7c185efd8f4b
Reviewed-on: https://go-review.googlesource.com/24571
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
If creating a new thread fails with EAGAIN, point the user at ulimit.
Fixes#15476.
Change-Id: Ib36519614b5c72776ea7f218a0c62df1dd91a8ea
Reviewed-on: https://go-review.googlesource.com/24570
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Updates x/net/http2 to git rev ef2e00e88 for https://golang.org/cl/24560,
"http2: make Transport return server's GOAWAY error back to the user"
Fixes#14627
Change-Id: I2bb123a3041e168db7c9446beef4ee47638f17ee
Reviewed-on: https://go-review.googlesource.com/24561
Reviewed-by: Andrew Gerrand <adg@golang.org>
Run-TryBot: Andrew Gerrand <adg@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Prior to this change package "foo" had to be installed in order to check
example names in "foo_test" package.
However by the time "foo_test" package is checked a parsed "foo" package
has been already constructed. Use it to check example names.
Also change TestDivergentPackagesExamples test to pass directory of the
package to the vet tool as it is the most common way to invoke it. This
requires changes to errchk to add support for grabbing source files from
a directory.
Fixes#16189
Change-Id: Ief103d07b024822282b86c24250835cc591793e8
Reviewed-on: https://go-review.googlesource.com/24488
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
TestPendingConnsAfterErr only cared that things didn't deadlock, so 5
seconds is a sufficient timer. We don't need 100 milliseconds.
I was able to reproduce with a tiny (5 nanosecond) timeout value,
instead of 100 milliseconds. In the process of testing with -race and
a high -count= value, I noticed several data races and panics
(sendings on a closed channel) which are also fixed in this change.
Fixes#15684
Change-Id: Ib4605fcc0f296e658cb948352ed642b801cb578c
Reviewed-on: https://go-review.googlesource.com/24550
Reviewed-by: Marko Tiikkaja <marko@joh.to>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Andrew Gerrand <adg@golang.org>
Don't configure HTTP/2 in http.Server.Serve(net.Listener) if the
Server's TLSConfig is set and doesn't include the "h2" NextProto
value. This avoids mutating a *tls.Config already in use if
previously passed to tls.NewListener.
Also document this. (it's come up a few times now)
Fixes#15908
Change-Id: I283eed82fdb29a791f80d801aadd9f75db244de0
Reviewed-on: https://go-review.googlesource.com/24508
Reviewed-by: Andrew Gerrand <adg@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Changes beyond generated tables:
- Now supports aliases to handle deprecated
property classes.
- Some Mongolian letters are now modifiers.
Other changes:
- strconv: newly generated table to be in sync
- regexp/syntax: updated maxFold
Fixes#16191
Change-Id: I56bdf21ee2f775f2a82d0465b3772faf5c24cb61
Reviewed-on: https://go-review.googlesource.com/24496
Run-TryBot: Marcel van Lohuizen <mpvl@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Several minor changes that remove a good chunk of the overhead added
to the reflect Name method over the 1.7 cycle, as seen from the
non-SSA architectures.
In particular, there are ~20 fewer instructions in reflect.name.name
on 386, and the method now qualifies for inlining.
The simple JSON decoding benchmark on darwin/386:
name old time/op new time/op delta
CodeDecoder-8 49.2ms ± 0% 48.9ms ± 1% -0.77% (p=0.000 n=10+9)
name old speed new speed delta
CodeDecoder-8 39.4MB/s ± 0% 39.7MB/s ± 1% +0.77% (p=0.000 n=10+9)
On darwin/amd64 the effect is less pronounced:
name old time/op new time/op delta
CodeDecoder-8 38.9ms ± 0% 38.7ms ± 1% -0.38% (p=0.005 n=10+10)
name old speed new speed delta
CodeDecoder-8 49.9MB/s ± 0% 50.1MB/s ± 1% +0.38% (p=0.006 n=10+10)
Counterintuitively, I get much more useful benchmark data out of my
MacBook Pro than a linux workstation with more expensive Intel chips.
While the laptop has fewer cores and an active GUI, the single-threaded
performance is significantly better (nearly 1.5x decoding throughput)
so the differences are more pronounced.
For #16117.
Change-Id: I4e0cc1cc2d271d47d5127b1ee1ca926faf34cabf
Reviewed-on: https://go-review.googlesource.com/24510
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This modifies a recent performance improvement to the
And8 and Or8 atomic functions which required both ppc64le
and ppc64 to use power8 instructions. Since then it was
decided that ppc64 (BE) should work for power5 and later.
This change uses instructions compatible with power5 for
ppc64 and uses power8 for ppc64le.
Fixes#16004
Change-Id: I623c75e8e6fd1fa063a53d250d86cdc9d0890dc7
Reviewed-on: https://go-review.googlesource.com/24181
Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Andrew Gerrand <adg@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
The version of pprof in gperftools has been deprecated.
No need to have a pointer to that version since go tool pprof
is included with the Go distro.
Change-Id: I6d769a68f64280f5db89ff6fbc67bfea9c8f1526
Reviewed-on: https://go-review.googlesource.com/24509
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
On linux/386 compared to tip:
name old time/op new time/op delta
DecodeInterfaceSlice-40 1.23ms ± 1% 1.17ms ± 1% -4.93% (p=0.000 n=9+10)
Recovers about half the performance regression from Go 1.6 on 386.
For #16117.
Change-Id: Ie8676d92a4da3e27ff21b91a98b3e13d16730ba1
Reviewed-on: https://go-review.googlesource.com/24468
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
