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LGTM=bradfitz, minux
R=golang-codereviews, bradfitz, chaishushan, minux
CC=golang-codereviews
https://codereview.appspot.com/191770043
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LGTM=dave, bradfitz, rsc
R=golang-codereviews, dave, bradfitz, rsc
CC=golang-codereviews
https://codereview.appspot.com/185130043
Committer: Russ Cox <rsc@golang.org>
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It is unused. It was introduced in the CL that added InputOffset.
I suspect it was an editing mistake.
LGTM=bradfitz
R=bradfitz
CC=golang-codereviews
https://codereview.appspot.com/182580043
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When we start work on Gerrit, ppc64 and garbage collection
work will continue in the master branch, not the dev branches.
(We may still use dev branches for other things later, but
these are ready to be merged, and doing it now, before moving
to Git means we don't have to have dev branches working
in the Gerrit workflow on day one.)
TBR=rlh
CC=golang-codereviews
https://codereview.appspot.com/183140043
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Fixes issue 8654.
LGTM=austin
R=austin
CC=golang-codereviews
https://codereview.appspot.com/180600043
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This is the last system-dependent file written by cmd/dist.
They are all now written by go generate.
cmd/dist is not needed to start building package runtime
for a different system anymore.
Now all the generated files can be assumed generated, so
delete the clumsy hacks in cmd/api.
Re-enable api check in run.bash.
LGTM=bradfitz
R=bradfitz
CC=golang-codereviews
https://codereview.appspot.com/185040044
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This was the last src/runtime/*.c file.
LGTM=austin
R=austin
CC=golang-codereviews
https://codereview.appspot.com/187770043
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640 bytes ought to be enough for anybody.
We'll bring this back down before Go 1.5. That's issue 9214.
TBR=rlh
CC=golang-codereviews
https://codereview.appspot.com/188730043
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This is going to hurt a bit but we'll make it better later.
Now the race detector can be run again.
I added the write barrier optimizations from
CL 183020043 to try to make it hurt a little less.
TBR=rlh
CC=golang-codereviews
https://codereview.appspot.com/185070043
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TBR=rlh
CC=golang-codereviews
https://codereview.appspot.com/181100044
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TBR=austin
CC=golang-codereviews
https://codereview.appspot.com/179290043
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Ensure that all gs are in a scan state when their stacks are being scanned.
LGTM=rsc
R=rsc
CC=golang-codereviews
https://codereview.appspot.com/179160044
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prefetchnta for GC
We don't know what we need yet, so add them all.
Add them even on x86 architectures (as no-ops) so that
the GC can refer to them unconditionally.
Eventually we'll know what we want and probably
have just one 'prefetch' with an appropriate meaning
on each architecture.
LGTM=rlh
R=rlh
CC=golang-codereviews
https://codereview.appspot.com/179160043
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LGTM=rsc
R=golang-codereviews
CC=golang-codereviews, rsc
https://codereview.appspot.com/180040043
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barriers for GC internal structures such as free lists.
LGTM=rsc
R=rsc
CC=golang-codereviews, rsc
https://codereview.appspot.com/179000043
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Brings in Linux time signature fixes. Should fix build.
TBR=austin
CC=golang-codereviews
https://codereview.appspot.com/176870043
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The garbage collector is now written in Go.
There is plenty to clean up (just like on dev.cc).
all.bash passes on darwin/amd64, darwin/386, linux/amd64, linux/386.
TBR=rlh
R=austin, rlh, bradfitz
CC=golang-codereviews
https://codereview.appspot.com/173250043
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Now the only difference between dev.cc and dev.garbage
is the runtime conversion on the one side and the
garbage collection on the other. They both have the
same set of changes from default and dev.power64.
LGTM=austin
R=austin
CC=golang-codereviews
https://codereview.appspot.com/172570043
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This is the revision that dev.cc is branched from.
LGTM=austin
R=austin
CC=golang-codereviews
https://codereview.appspot.com/169590043
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Also improve missing GC mark diagnostics.
LGTM=rsc
R=rsc
CC=golang-codereviews
https://codereview.appspot.com/169450043
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Add missing write barrier when initializing state
for newly created goroutine. Add write barrier for
same slot when preempting a goroutine.
Disable write barrier during goroutine death,
because dopanic does pointer writes.
With concurrent mark enabled (not in this CL), all.bash passed once.
The second time, TestGoexitCrash-2 failed.
LGTM=rlh
R=rlh
CC=golang-codereviews
https://codereview.appspot.com/167610043
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Also rewrite some casp that don't use real pointers
to use casuintptr instead.
LGTM=rlh
R=rlh
CC=golang-codereviews
https://codereview.appspot.com/166440044
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LGTM=rsc
R=rsc
CC=golang-codereviews
https://codereview.appspot.com/174820043
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To turn concurrent gc on alter the if false in func gogc
currently at line 489 in malloc.go
LGTM=rsc
R=rsc
CC=golang-codereviews, rlh
https://codereview.appspot.com/172190043
Committer: Russ Cox <rsc@golang.org>
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This got lost in the change that added the writebarrierfat variants.
LGTM=rlh
R=rlh
CC=golang-codereviews
https://codereview.appspot.com/165510043
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Now each C printf, Go print, or Go println is guaranteed
not to be interleaved with other calls of those functions.
This should help when debugging concurrent failures.
LGTM=rlh
R=rlh
CC=golang-codereviews
https://codereview.appspot.com/169120043
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We still don't know why this is happening.
LGTM=rlh
R=rlh
CC=golang-codereviews
https://codereview.appspot.com/169990043
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- Some sequencing issues with stopping the first gc_m round
at the right place to set up correctly for the second round.
- atomicxor8 is not idempotent; avoid xor.
- Maintain BitsDead type bits correctly; see long comment added.
- Enable checkmark phase by default for now.
LGTM=rlh
R=rlh
CC=golang-codereviews
https://codereview.appspot.com/171090043
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TBR=crawshaw
R=crawshaw
CC=golang-codereviews
https://codereview.appspot.com/168860046
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This adds an independent mark phase to the GC that can be used to
verify the the default concurrent mark phase has found all reachable
objects. It uses the upper 2 bits of the boundary nibble to encode
the mark leaving the lower bits to encode the boundary and the
normal mark bit.
LGTM=rsc
R=rsc
CC=golang-codereviews
https://codereview.appspot.com/167130043
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writebarrierptr
This CL implements the many multiword write barriers by calling
writebarrierptr, so that only writebarrierptr needs the actual barrier.
In lieu of an actual barrier, writebarrierptr checks that the value
being copied is not a small non-zero integer. This is enough to
shake out bugs where the barrier is being called when it should not
(for non-pointer values). It also found a few tests in sync/atomic
that were being too clever.
This CL adds a write barrier for the memory moved during the
builtin copy function, which I forgot when inserting barriers for Go 1.4.
This CL re-enables some write barriers that were disabled for Go 1.4.
Those were disabled because it is possible to change the generated
code so that they are unnecessary most of the time, but we have not
changed the generated code yet. For safety they must be enabled.
None of this is terribly efficient. We are aiming for correct first.
LGTM=rlh
R=rlh
CC=golang-codereviews
https://codereview.appspot.com/168770043
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The goal here is to get the big-endian fixes so that
in some upcoming code movement for write barriers
I don't make them unmergeable.
LGTM=rlh
R=rlh
CC=golang-codereviews
https://codereview.appspot.com/166890043
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LGTM=rlh
R=rlh
CC=golang-codereviews
https://codereview.appspot.com/170730043
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LGTM=rsc
R=rsc
CC=golang-codereviews
https://codereview.appspot.com/163390043
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LGTM=rlh
R=rlh, dvyukov
CC=golang-codereviews
https://codereview.appspot.com/157430044
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This test gives a false negative at an observed rate of 1 in a 1000
due to the fact that it runs for < 100 ms. allowing GC pauses to
warp the results. Changed the test so that it triggers only if it
remains non-linear for much larger problem sizes.
LGTM=rsc
R=rsc
CC=golang-codereviews
https://codereview.appspot.com/164010043
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Routines and logic to preform a concurrent stack scan of go-routines.
This CL excersizes most of the functionality needed. The
major exception being that it does not scan running goroutines.
After doing the scans it relies on a STW to finish the GC, including
rescanning the stacks. It is intended to achieve correctness,
performance will follow.
LGTM=rsc
R=golang-codereviews, rsc
CC=dvyukov, golang-codereviews
https://codereview.appspot.com/156580043
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The changes got rid of the problems we were seeing.
We suspect the pushcnt field has a race.
LGTM=rsc
R=dvyukov, rsc
CC=golang-codereviews
https://codereview.appspot.com/159330043
Committer: Russ Cox <rsc@golang.org>
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hg was unable to create a CL on the code review server for this,
so I am submitting the merge by hand.
The only manual edits are in mgc0.c, to reapply the
removal of cached/ncached to the new code.
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Comments lay out the concurrent GC algorithms.
This CL implements parts of the algorithm.
The acknowledgement code has been removed from this CL
LGTM=rsc, dvyukov
R=dvyukov, rsc
CC=golang-codereviews
https://codereview.appspot.com/151540043
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This picks up the TestDualStackUDPListener fix.
LGTM=rlh
R=rlh
CC=golang-codereviews
https://codereview.appspot.com/147660044
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This picks up the selectdone dangling pointer fix, among others.
LGTM=rlh
R=rlh
CC=golang-codereviews
https://codereview.appspot.com/153070045
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Refactoring of the scan and mark phase so that concurrent GC,
in particular the write barrier, can share a common infrastructure.
Now that the scan and mark phases have been separated
we will be able to scan stacks without blackening any objects.
This in turn will allow us to delay installing expensive write barrier code.
LGTM=rsc
R=rsc, khr, dvyukov
CC=golang-codereviews
https://codereview.appspot.com/145640044
Committer: Russ Cox <rsc@golang.org>
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pointers
In old conservative Go, this could cause memory leaks.
A new pickier collector might reasonably crash when it saw one of these.
LGTM=rlh
R=rlh
CC=golang-codereviews
https://codereview.appspot.com/147480043
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Not found because it was not used by name.
Add name in comments for what's left behind.
LGTM=rlh
R=rlh
CC=golang-codereviews
https://codereview.appspot.com/148430043
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LGTM=rlh
R=rlh, minux
CC=golang-codereviews
https://codereview.appspot.com/151940043
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description says so
This means I won't have to edit the plugin when I create
the next dev branch.
LGTM=r, adg
R=r, adg
CC=golang-codereviews
https://codereview.appspot.com/148950045
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The file was created just to have something to check in
to create the new branch. No longer needed.
LGTM=rlh
R=rlh
CC=golang-codereviews
https://codereview.appspot.com/140670043
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