benchmark old ns/op new ns/op delta
BenchmarkSelectUncontended 220 165 -25.00%
BenchmarkSelectContended 209 161 -22.97%
BenchmarkSelectProdCons 1042 904 -13.24%
But more importantly this change will allow
to get rid of free function in runtime.
Fixes#6494.
LGTM=rsc, khr
R=golang-codereviews, rsc, dominik.honnef, khr
CC=golang-codereviews, remyoudompheng
https://golang.org/cl/107670043
This is a temporary change to see how far the
builder gets when it times out.
LGTM=aram, 0intro
R=0intro, aram
CC=golang-codereviews, mischief
https://golang.org/cl/111400043
Fix virtual address of the start of the text segment
on amd64 Plan 9.
This issue has been partially fixed in cmd/add2line,
as part of CL 106460044, but we forgot to report the
change to cmd/objdump.
In the meantime, we also fixed the textStart address
in both cmd/add2line and cmd/objdump.
LGTM=aram, ality, mischief
R=rsc, mischief, aram, ality
CC=golang-codereviews, jas
https://golang.org/cl/117920043
Hook pre-commit runs before 'hg commit' command whereas hook precommit runs
after the user has entered commit message.
LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/106320043
The CopyFat benchmarks were changed in CL 92760044. See CL 111350043 for discussion.
LGTM=khr
R=khr
CC=golang-codereviews
https://golang.org/cl/116000043
These benchmarks are important for performance. When compiling the stdlib:
* 77.1% of the calls to sgen (copyfat) are for 16 bytes; another 8.7% are for 24 bytes. (The next most common is 32 bytes, at 5.7%.)
* Over half the calls to clearfat are for 16 or 24 bytes.
LGTM=khr
R=golang-codereviews, khr
CC=golang-codereviews
https://golang.org/cl/111350043
Ken's standalone file server and its derivatives, like cwfs, return
error strings different from fossil when the user opens non-existent
files.
LGTM=aram, 0intro, r
R=0intro, aram, r
CC=golang-codereviews, ken
https://golang.org/cl/112420045
Also, fix a write check in writeBuf and make some bounds checks simpler.
LGTM=gri
R=golang-codereviews, adg, gri, r, minux
CC=golang-codereviews
https://golang.org/cl/113060043
updatememstats is called on both the m and g stacks.
Call into flushallmcaches correctly. flushallmcaches
can only run on the M stack.
This is somewhat temporary. once ReadMemStats is in
Go we can have all of this code M-only.
LGTM=dvyukov
R=golang-codereviews, dvyukov
CC=golang-codereviews
https://golang.org/cl/116880043
Encoder compilation must be enc-independent,
because the resulting program is reused across
different encoders.
LGTM=r
R=golang-codereviews, r
CC=golang-codereviews
https://golang.org/cl/115860043
Breaks build for FreeBSD. Probably clang related?
««« original CL description
cmd/cgo: disable inappropriate warnings when the gcc struct is empty
package main
//#cgo CFLAGS: -Wall
//void test() {}
import "C"
func main() {
C.test()
}
This code will cause gcc issuing warnings about unused variable.
This commit use offset of the second return value of
Packages.structType to detect whether the gcc struct is empty,
and if it's directly invoke the C function instead of writing an
unused code.
LGTM=dave, minux
R=golang-codereviews, iant, minux, dave
CC=golang-codereviews
https://golang.org/cl/109640045
»»»
TBR=dfc
R=dave
CC=golang-codereviews
https://golang.org/cl/114990044
package main
//#cgo CFLAGS: -Wall
//void test() {}
import "C"
func main() {
C.test()
}
This code will cause gcc issuing warnings about unused variable.
This commit use offset of the second return value of
Packages.structType to detect whether the gcc struct is empty,
and if it's directly invoke the C function instead of writing an
unused code.
LGTM=dave, minux
R=golang-codereviews, iant, minux, dave
CC=golang-codereviews
https://golang.org/cl/109640045
redo stack allocation. This is mostly the same as
the original CL with a few bug fixes.
1. add racemalloc() for stack allocations
2. fix poolalloc/poolfree to terminate free lists correctly.
3. adjust span ref count correctly.
4. don't use cache for sizes >= StackCacheSize.
Should fix bugs and memory leaks in original changelist.
««« original CL description
undo CL 104200047 / 318b04f28372
Breaks windows and race detector.
TBR=rsc
««« original CL description
runtime: stack allocator, separate from mallocgc
In order to move malloc to Go, we need to have a
separate stack allocator. If we run out of stack
during malloc, malloc will not be available
to allocate a new stack.
Stacks are the last remaining FlagNoGC objects in the
GC heap. Once they are out, we can get rid of the
distinction between the allocated/blockboundary bits.
(This will be in a separate change.)
Fixes#7468Fixes#7424
LGTM=rsc, dvyukov
R=golang-codereviews, dvyukov, khr, dave, rsc
CC=golang-codereviews
https://golang.org/cl/104200047
»»»
TBR=rsc
CC=golang-codereviews
https://golang.org/cl/101570044
»»»
LGTM=dvyukov
R=dvyukov, dave, khr, alex.brainman
CC=golang-codereviews
https://golang.org/cl/112240044
Resolves TODO for not walking all goroutines in NumGoroutines.
LGTM=khr
R=golang-codereviews, khr
CC=golang-codereviews, rsc
https://golang.org/cl/107290044
1. Add select on sync channels benchmark.
2. Make channels in BenchmarkSelectNonblock shared.
With GOMAXPROCS=1 it is the same, but with GOMAXPROCS>1
it becomes a more interesting benchmark.
LGTM=khr
R=golang-codereviews, khr
CC=golang-codereviews
https://golang.org/cl/115780043
Previously we had a bitmap to check whether or not a byte
appears in a string should be replaced. But we don't actually
need a separate bitmap for that purpose. Removing the bitmap
makes the code simpler.
LGTM=dave, iant, nigeltao
R=golang-codereviews, dave, gobot, nigeltao, iant, bradfitz, rsc
CC=golang-codereviews
https://golang.org/cl/110100043
Fixes#5750.
https://code.google.com/p/go/issues/detail?id=5750
os: Separate windows from posix. Implement windows support.
path/filepath: Use the same implementation as other platforms
syscall: Add/rework new APIs for Windows
LGTM=alex.brainman
R=golang-codereviews, alex.brainman, gobot, rsc, minux
CC=golang-codereviews
https://golang.org/cl/86160044
"archive/tar: reuse temporary buffer in writeHeader" introduced a
change which was supposed to help lower the number of allocations from
512 bytes for every call to writeHeader. This change broke the writing
of PAX headers.
writeHeader calls writePAXHeader and writePAXHeader calls writeHeader
again. writeHeader will end up writing the PAX header twice.
example broken header:
PaxHeaders.4007/NetLock_Arany_=Class_Gold=_Ftanstvny.crt0000000000000000000000000000007112301216634021512 xustar0000000000000000
PaxHeaders.4007/NetLock_Arany_=Class_Gold=_Ftanstvny.crt0000000000000000000000000000007112301216634021512 xustar0000000000000000
example correct header:
PaxHeaders.4290/NetLock_Arany_=Class_Gold=_Ftanstvny.crt0000000000000000000000000000007112301216634021516 xustar0000000000000000
0100644000000000000000000000270412301216634007250 0ustar0000000000000000
This commit adds a dedicated buffer for pax headers to the Writer
struct. This change increases the size of the struct by 512 bytes, but
allows tar/writer to avoid allocating 512 bytes for all written
headers and it avoids allocating 512 more bytes for pax headers.
LGTM=dsymonds
R=dsymonds, dave, iant
CC=golang-codereviews
https://golang.org/cl/110480043
The garbage collector and stack scans are good enough now.
Fixes#7446.
LGTM=r
R=r, dvyukov
CC=golang-codereviews, mdempsky, mtj
https://golang.org/cl/112870046
As written, the ! applies before the &1.
This would crash writing out missing pcdata tables
if we ever used non-contiguous IDs in a function.
We don't, but fix anyway.
LGTM=iant, minux
R=minux, iant
CC=golang-codereviews
https://golang.org/cl/117810047
DWARF says only one is necessary.
The count is preferable because it admits 0-length arrays.
Update debug/dwarf to handle either form.
LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/111230044
They can be large, so use a varint encoding rather than only one byte.
LGTM=iant, rsc
R=rsc, iant
CC=golang-codereviews
https://golang.org/cl/113180043
The issue is discovered during testing of a change to runtime.
Even if it is unlikely to happen, the comment can safe an hour
next person who hits it.
LGTM=khr
R=golang-codereviews, khr
CC=golang-codereviews, rlh, rsc
https://golang.org/cl/116790043
I don't see how it can lead to bad things today.
But it's better to kill it before it does.
LGTM=khr
R=golang-codereviews, khr
CC=golang-codereviews, rsc
https://golang.org/cl/111130045
Make CanBackquote(invalid UTF-8) return false.
Also add two test which show that CanBackquote reports
true for strings containing a BOM.
Fixes#7572.
LGTM=r
R=golang-codereviews, bradfitz, r
CC=golang-codereviews
https://golang.org/cl/111780045
