In the event that code tries to use a hash function that isn't compiled
in and panics, give the developer a fighting chance of figuring out
which hash function it needed.
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/12420045
Runtime netpoll supports at most one read waiter
and at most one write waiter. It's responsibility
of net package to ensure that. Currently windows
implementation allows more than one waiter in Accept.
It leads to "fatal error: netpollblock: double wait".
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/12400045
Whether the keys are concatenated or separate (or a mixture) depends on the server.
Fixes#5979.
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/12433043
Windows dynamic priority boosting assumes that a process has different types
of dedicated threads -- GUI, IO, computational, etc. Go processes use
equivalent threads that all do a mix of GUI, IO, computations, etc.
In such context dynamic priority boosting does nothing but harm, so turn it off.
In particular, if 2 goroutines do heavy IO on a server uniprocessor machine,
windows rejects to schedule timer thread for 2+ seconds when priority boosting is enabled.
Fixes#5971.
R=alex.brainman
CC=golang-dev
https://golang.org/cl/12406043
The test isn't checking deliberate panics so catching them just makes the code longer.
R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/12420043
This CL makes IPAddr, UDPAddr and TCPAddr implement sockaddr
interface, UnixAddr is already sockaddr interface compliant, and
reduces unnecessary conversions between net.Addr, net.sockaddr and
syscall.Sockaddr.
This is in preparation for runtime-integrated network pollster for BSD
variants.
Update #5199
R=golang-dev, dave, bradfitz
CC=golang-dev
https://golang.org/cl/12010043
It's okay to preempt at ordinary function calls because
compilers arrange that there are no live registers to save
on entry to the function call.
The software floating point routines are function calls
masquerading as individual machine instructions. They are
expected to keep all the registers intact. In particular,
they are expected not to clobber all the floating point
registers.
The floating point registers are kept per-M, because they
are not live at non-preemptive goroutine scheduling events,
and so keeping them per-M reduces the number of 132-byte
register blocks we are keeping in memory.
Because they are per-M, allowing the goroutine to be
rescheduled during software floating point simulation
would mean some other goroutine could overwrite the registers
or perhaps the goroutine would continue running on a different
M entirely.
Disallow preemption during the software floating point
routines to make sure that a function full of floating point
instructions has the same floating point registers throughout
its execution.
R=golang-dev, dave
CC=golang-dev
https://golang.org/cl/12298043
Per suggestion from Russ in February. Then strings.IndexByte
can be implemented in terms of the shared code in pkg runtime.
Update #3751
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/12289043
I used just enough of the data provided by Matt in Issue 5915 to trigger
issue 5915. As luck would have it, using slightly less of it triggered
issue 5962.
Fixes#5915.
Fixes#5962.
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/12288043
This allows to at least determine goroutine "identity".
Now it looks like:
goroutine 12 [running]:
goroutine running on other thread; stack unavailable
created by testing.RunTests
src/pkg/testing/testing.go:440 +0x88e
R=golang-dev, r, rsc
CC=golang-dev
https://golang.org/cl/12248043
We see timeouts in these tests on some platforms,
but not on the others. The hypothesis is that
the problematic platforms are slow uniprocessors.
Stack traces do not suggest that the process
is completely hang, and it is able to schedule
the alarm goroutine. And if it actually hangs,
we still will be able to detect that.
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/12253043
With dup3, we can avoid an extra system call on some machines
while holding syscall.ForkLock. Currently we have to
syscall.Dup + syscall.CloseOnExec.
On machines with Linux and a new enough kernel, this can just
be dup3.
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/12170045
Preemption during the software floating point code
could cause m (R9) to change, so that when the
original registers were restored at the end of the
floating point handler, the changed and correct m
would be replaced by the old and incorrect m.
TBR=dvyukov
CC=golang-dev
https://golang.org/cl/11883045
Operations on int64 are very stack consuming with 5c.
Fixes netbsd/arm build.
Before: TEXT runtime.timediv+0(SB),7,$52-16
After: TEXT runtime.timediv+0(SB),7,$44-16
The stack usage is unchanged on 386:
TEXT runtime.timediv+0(SB),7,$8-16
R=golang-dev, dvyukov, bradfitz
CC=golang-dev
https://golang.org/cl/12182044
This patch introduces specialized functions for initial
and final permutations, and precomputes the output of the
third permutation on the S-box elements.
benchmark old ns/op new ns/op delta
BenchmarkEncrypt 3581 1226 -65.76%
BenchmarkDecrypt 3590 1224 -65.91%
benchmark old MB/s new MB/s speedup
BenchmarkEncrypt 2.23 6.52 2.92x
BenchmarkDecrypt 2.23 6.53 2.93x
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/12072045
Update #5139.
Double wakeup on Note was reported several times,
but no reliable reproducer.
There also was a strange report about weird value of epoll fd.
Maybe it's corruption of global data...
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/12182043
Sysmon thread parks if no goroutines are running (runtime.sched.npidle ==
runtime.gomaxprocs).
Currently it's unparked when a goroutine enters syscall, it was enough
to retake P's from blocking syscalls.
But it's not enough for reliable goroutine preemption. We need to ensure that
sysmon runs if any goroutines are running.
R=rsc
CC=golang-dev
https://golang.org/cl/12176043
Submitted with some unrelated changes that were not intended to go in.
««« original CL description
runtime: do not park sysmon thread if any goroutines are running
Sysmon thread parks if no goroutines are running (runtime.sched.npidle == runtime.gomaxprocs).
Currently it's unparked when a goroutine enters syscall, it was enough
to retake P's from blocking syscalls.
But it's not enough for reliable goroutine preemption. We need to ensure that
sysmon runs if any goroutines are running.
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/12167043
»»»
R=rsc
CC=golang-dev
https://golang.org/cl/12171044
This is required to properly unwind reflect.methodValueCall/makeFuncStub.
Fixes#5954.
Stats for 'go install std':
61849 total INSTCALL
24655 currently have ArgSize metadata
27278 have ArgSize metadata with this change
godoc size before: 11351888, after: 11364288
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/12163043
Sysmon thread parks if no goroutines are running (runtime.sched.npidle == runtime.gomaxprocs).
Currently it's unparked when a goroutine enters syscall, it was enough
to retake P's from blocking syscalls.
But it's not enough for reliable goroutine preemption. We need to ensure that
sysmon runs if any goroutines are running.
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/12167043
Adds layout cases with seconds for stdISO8601 and stdNumTZ with and without colons. Update time.Format to append seconds for those cases.
Fixes#4934.
R=golang-dev, r, bradfitz
CC=golang-dev
https://golang.org/cl/8132044
This means that printing a Node will produce output that can be used as valid input.
It won't be exactly the same - some spacing may be different - but it will mean the same.
Fixes#4593.
R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/12006047
When scanning input and "white space" is permitted, a carriage return
followed immediately by a newline (\r\n) is treated exactly the same
as a plain newline (\n). I hope this makes it work better on Windows.
We do it everywhere, not just on Windows, since why not?
Fixes#5391.
R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/12142043
When comparing strings, check these (in order):
- length mismatch => not equal
- string pointer equal => equal
- if length is short:
- memeq on body
- if length is long:
- compare first&last few bytes, if different => not equal
- save entry as a possible match
- after checking every entry, if there is only one possible
match, use memeq on that entry. Otherwise, fallback to hash.
benchmark old ns/op new ns/op delta
BenchmarkSameLengthMap 43 4 -89.77%
Fixes#5194.
Update #3885.
R=golang-dev, bradfitz, khr, rsc
CC=golang-dev
https://golang.org/cl/12128044
The prefix was not uniformly applied and is probably better left off anyway.
Fixes#4944.
R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/12140043
struct Hmap is the header for a map value.
CL 8377046 made flags a uint32 so that it could be updated atomically,
but that bumped the struct to 56 bytes, which allocates as 64 bytes (on amd64).
hash0 is initialized from runtime.fastrand1, which returns a uint32,
so the top 32 bits were always zero anyway. Declare it as a uint32
to reclaim 4 bytes and bring the Hmap size back down to a 48-byte allocation.
Fixes#5237.
R=golang-dev, khr, khr
CC=bradfitz, dvyukov, golang-dev
https://golang.org/cl/12034047
If netFD is closed by finalizer, runtime netpoll descriptor is not freed.
R=golang-dev, dave, alex.brainman
CC=golang-dev
https://golang.org/cl/12037043
EscapeText now escapes 0xFFFD returned from DecodeRune as 0xFFFD, rather than passing through the original byte.
Fixes#5880.
R=golang-dev, r, bradfitz, adg
CC=golang-dev
https://golang.org/cl/11975043
notetsleep: nosplit stack overflow
120 assumed on entry to notetsleep
96 after notetsleep uses 24
88 on entry to runtime.semasleep
32 after runtime.semasleep uses 56
24 on entry to runtime.nanotime
-8 after runtime.nanotime uses 32
Nanotime seems to be using only 24 bytes of stack space.
Unless I am missing something.
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/12041044
notetsleep: nosplit stack overflow
120 assumed on entry to notetsleep
80 after notetsleep uses 40
72 on entry to runtime.futexsleep
16 after runtime.futexsleep uses 56
8 on entry to runtime.printf
-16 after runtime.printf uses 24
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/12047043
Split stack checks (morestack) corrupt g->sched,
but g->sched must be preserved consistent for GC/traceback.
The change implements runtime.notetsleepg function,
which does entersyscall/exitsyscall and is carefully arranged
to not call any split functions in between.
R=rsc
CC=golang-dev
https://golang.org/cl/11575044
Close netpoll descriptor along with socket.
Ensure that error paths close the descriptor as well.
R=golang-dev, mikioh.mikioh, alex.brainman
CC=golang-dev
https://golang.org/cl/11987043
This is in preparation for runtime-integrated network pollster for BSD
variants.
Update #5199
R=golang-dev, fvbommel, dave
CC=golang-dev
https://golang.org/cl/11984043
This is in preparation for runtime-integrated network pollster for BSD
variants.
Update #5199
R=golang-dev, dave
CC=golang-dev
https://golang.org/cl/11932044
This CL extends existing sockaddr interface to accommodate not only
internet protocol family endpoint addressess but unix network family
endpoint addresses.
This is in preparation for runtime-integrated network pollster for BSD
variants.
Update #5199
R=golang-dev, dave
CC=golang-dev
https://golang.org/cl/11979043
If netpoll has been told to block, it must not return with nil,
otherwise scheduler assumes that netpoll is disabled.
R=golang-dev, alex.brainman
CC=golang-dev
https://golang.org/cl/11920044
Make it accept type, combine flags.
Several reasons for the change:
1. mallocgc and settype must be atomic wrt GC
2. settype is called from only one place now
3. it will help performance (eventually settype
functionality must be combined with markallocated)
4. flags are easier to read now (no mallocgc(sz, 0, 1, 0) anymore)
R=golang-dev, iant, nightlyone, rsc, dave, khr, bradfitz, r
CC=golang-dev
https://golang.org/cl/10136043
The rlimit arguments for prlimit are reversed for linux 32-bit (386 and arm).
Getrlimit becomes Setrlimit and vice versa.
Fixes#5949.
R=iant, mikioh.mikioh, rsc
CC=golang-dev
https://golang.org/cl/11803043
An ARM version of md5block.go with a big improvement in
throughput (up to 2.5x) and a reduction in object size (21%).
Code size
Before 3100 bytes
After 2424 bytes
21% smaller
Benchmarks on Rasperry Pi
benchmark old ns/op new ns/op delta
BenchmarkHash8Bytes 11703 6636 -43.30%
BenchmarkHash1K 38057 21881 -42.50%
BenchmarkHash8K 208131 142735 -31.42%
BenchmarkHash8BytesUnaligned 11457 6570 -42.66%
BenchmarkHash1KUnaligned 69334 26841 -61.29%
BenchmarkHash8KUnaligned 455120 182223 -59.96%
benchmark old MB/s new MB/s speedup
BenchmarkHash8Bytes 0.68 1.21 1.78x
BenchmarkHash1K 26.91 46.80 1.74x
BenchmarkHash8K 39.36 57.39 1.46x
BenchmarkHash8BytesUnaligned 0.70 1.22 1.74x
BenchmarkHash1KUnaligned 14.77 38.15 2.58x
BenchmarkHash8KUnaligned 18.00 44.96 2.50x
benchmark old allocs new allocs delta
BenchmarkHash8Bytes 1 0 -100.00%
BenchmarkHash1K 2 0 -100.00%
BenchmarkHash8K 2 0 -100.00%
BenchmarkHash8BytesUnaligned 1 0 -100.00%
BenchmarkHash1KUnaligned 2 0 -100.00%
BenchmarkHash8KUnaligned 2 0 -100.00%
benchmark old bytes new bytes delta
BenchmarkHash8Bytes 64 0 -100.00%
BenchmarkHash1K 128 0 -100.00%
BenchmarkHash8K 128 0 -100.00%
BenchmarkHash8BytesUnaligned 64 0 -100.00%
BenchmarkHash1KUnaligned 128 0 -100.00%
BenchmarkHash8KUnaligned 128 0 -100.00%
This also adds another test which makes sure that the sums
over larger blocks work properly. I wrote this test when I was
worried about memory corruption.
R=golang-dev, dave, bradfitz, rsc, ajstarks
CC=golang-dev, minux.ma, remyoudompheng
https://golang.org/cl/11648043
Revision 15629 (8d71734a0cb0) removed the serverConn interface
that was introduce in revision 7718 (ee5e80c62862). The
serverConn interface was there for use by gccgo on Solaris,
and it is still needed there. Solaris does not support
connecting to the syslog daemon over TCP, and gccgo simply
calls the C library function. This CL restores the
interface.
R=golang-dev, bradfitz, rsc
CC=golang-dev
https://golang.org/cl/11737043