commit e3b4b7baad555f74b6fbc0ddc00d46ed0ac03a0a [browse]
Author: Jordan Rhee
Date: 2018-12-18 12:54:23 -08:00

runtime: use QPC for nanotime and time.now on windows/arm

The previous implementation of nanotime and time.now used a time source
that was updated on the system clock tick, which has a maximum
resolution of about 1ms. On 386 and amd64, this time source maps to
the system performance counter, so has much higher resolution.
On ARM, use QueryPerformanceCounter() to get a high resolution timestamp.

Updates #26148

Change-Id: I1abc99baf927a95b472ac05020a7788626c71d08
Reviewed-on: https://go-review.googlesource.com/c/154758
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

commit 9ded8b0e97588895e00e93299e4a4a748cfa3a4b [browse]
Author: Elias Naur
Date: 2018-12-18 21:32:48 +01:00

doc/go1.12: note that syscall.Getdirentries is no longer supported on iOS

Change-Id: I4277f4130b460b42c5b51fd5a5e07f6c0e62163b
Reviewed-on: https://go-review.googlesource.com/c/154720
Reviewed-by: Ian Lance Taylor <iant@golang.org>

commit 9d0318fc9daff2e72d540dfc1d9840cce16ea2bf [browse]
Author: Filippo Valsorda
Date: 2018-12-18 15:32:58 -05:00

api: promote next to go1.12

Change-Id: I9a30c76d1299a494cce69b1060156bc2932ac8d5
Reviewed-on: https://go-review.googlesource.com/c/154857
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

commit c343b6b2b81f9c6d4007c2c3c567dfaadd4fa4e6 [browse]
Author: Kevin Burke
Date: 2018-12-17 00:37:07 Z

os: show how to print permission bits in octal

Permission bits are most commonly viewed in string form (rwx-- etc) or
in octal form (0755), but the latter is relatively rare in Go.
Demonstrate how to print a FileMode in readable octal format.

Change-Id: I41feb801bcecb5077d4eabafdea27c149fc179a1
Reviewed-on: https://go-review.googlesource.com/c/154423
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

commit 7ef718f16fa05cd07bb0f7d22aa4bc57067de1f2 [browse]
Author: Michael Anthony Knyszek
Date: 2018-12-11 22:03:04 Z

runtime: call mmap with MAP_FIXED on BSDs in race mode

This change makes it so that reserving more of the address space for the
heap calls mmap with MAP_FIXED in race mode. Race mode requires certain
guarantees on where the heap is located in the address space, and on
Darwin 10.10 it appears that the kernel may end up ignoring the hint
quite often (#26475). Using MAP_FIXED is relatively OK in race mode
because nothing else should be mapped in the memory region provided by
the initial hints.

Fixes #26475.

Change-Id: Id7ac1534ee74f6de491bc04441f27dbda09f0285
Reviewed-on: https://go-review.googlesource.com/c/153897
Reviewed-by: Austin Clements <austin@google.com>
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>