Currently nsIThreadManager::spinEventLoopUntil doesn't monitor the shutting
down. Firefox shutting down can be blocked by a 'broken' use of
nsIThreadManager::spinEventLoopUntil.
nsIThreadManager::spinEventLoopUntilOrShutdown should be used instead.
We would like to be able to see if a given hang in BHR occurred
under high CPU load, as this is an indication that the hang is
of less use to us, since it's likely that the external CPU use
is more responsible for it.
The way this works is fairly simple. We get the system CPU usage
on a scale from 0 to 1, and we get the current process's CPU
usage, also on a scale from 0 to 1, and we subtract the latter
from the former. We then compare this value to a threshold, which
is 1 - (1 / p), where p is the number of (virtual) cores on the
machine. This threshold might need to be tuned, so that we
require an entire physical core in order to not annotate the hang,
but for now it seemed the most reasonable line in the sand.
I should note that this considers CPU usage in child or parent
processes as external. While we are responsible for that CPU usage,
it still indicates that the stack we receive from BHR is of little
value to us, since the source of the actual hang is external to
that stack.
MozReview-Commit-ID: JkG53zq1MdY
--HG--
extra : rebase_source : 16553a9b5eac0a73cd1619c6ee01fa177ca60e58
This patch refactors the nsThread event queue to clean it up and to make it easier to restructure. The fundamental concepts are as follows:
Each nsThread will have a pointer to a refcounted SynchronizedEventQueue. A SynchronizedEQ takes care of doing the locking and condition variable work when posting and popping events. For the actual storage of events, it delegates to an AbstractEventQueue data structure. It keeps a UniquePtr to the AbstractEventQueue that it uses for storage.
Both SynchronizedEQ and AbstractEventQueue are abstract classes. There is only one concrete implementation of SynchronizedEQ in this patch, which is called ThreadEventQueue. ThreadEventQueue uses locks and condition variables to post and pop events the same way nsThread does. It also encapsulates the functionality that DOM workers need to implement their special event loops (PushEventQueue and PopEventQueue). In later Quantum DOM work, I plan to have another SynchronizedEQ implementation for the main thread, called SchedulerEventQueue. It will have special code for the cooperatively scheduling threads in Quantum DOM.
There are two concrete implementations of AbstractEventQueue in this patch: EventQueue and PrioritizedEventQueue. EventQueue replaces the old nsEventQueue. The other AbstractEventQueue implementation is PrioritizedEventQueue, which uses multiple queues for different event priorities.
The final major piece here is ThreadEventTarget, which splits some of the code for posting events out of nsThread. Eventually, my plan is for multiple cooperatively scheduled nsThreads to be able to share a ThreadEventTarget. In this patch, though, each nsThread has its own ThreadEventTarget. The class's purpose is just to collect some related code together.
One final note: I tried to avoid virtual dispatch overhead as much as possible. Calls to SynchronizedEQ methods do use virtual dispatch, since I plan to use different implementations for different threads with Quantum DOM. But all the calls to EventQueue methods should be non-virtual. Although the methods are declared virtual, all the classes used are final and the concrete classes involved should all be known through templatization.
MozReview-Commit-ID: 9Evtr9oIJvx
Nothing is changed in this patch except for renaming and code move around.
The strategy is to have the final file setup in this patch without any
detail change. The actual code change will be in the next patch so that
we can focus on reviewing the diff in the next patch regarding IdleTaskRunner.
MozReview-Commit-ID: 4Bul9mZ7z1n
--HG--
extra : rebase_source : b978da3a3c68da58f9fd93502bcc4295acd699ce
extra : source : 833d4b69accbf7d1d60f9f11d807ee37d608b6fe
Nothing is changed in this patch except for renaming and code move around.
The strategy is to have the final file setup in this patch without any
detail change. The actual code change will be in the next patch so that
we can focus on reviewing the diff in the next patch regarding IdleTaskRunner.
MozReview-Commit-ID: 4Bul9mZ7z1n
--HG--
extra : rebase_source : 21d7d601c70304d69100d96cecfdb3e0322cb777
extra : intermediate-source : 366862231c26e085fe749012a09418aa31936224
extra : source : 7b4e77911d1471c33fda0a43b50ed17c5274e795
Everything depending on the widget being gonk can go away, as well as
everything depending on MOZ_AUDIO_CHANNEL_MANAGER, which was only
defined on gonk builds under b2g/ (which goes away in bug 1357326).
--HG--
extra : rebase_source : 9f0aeeb7eea8417fa4e06d662d566d67ecaf2a24
The intent of idleDispatch is the possibility to have a runnable
executed when the thread is idle. This is accomplished by adding an
event queue for idle tasks that will only be considered when the main
event queue is empty and the caller of ProcessNextEvent doesn't
require that we wait until there is an event on the main event queue.
MozReview-Commit-ID: IDWQfzZqWpZ
--HG--
extra : rebase_source : 0d5bfeebd08e01597c2cd8b76e8e848d9f9c58f0
The intent of idleDispatch is the possibility to have a runnable
executed when the thread is idle. This is accomplished by adding an
event queue for idle tasks that will only be considered when the main
event queue is empty and the caller of ProcessNextEvent doesn't
require that we wait until there is an event on the main event queue.
MozReview-Commit-ID: IDWQfzZqWpZ
--HG--
extra : rebase_source : b16ff65d7a9b2fa16216a9ce8756358014d7ad96
This removes the unnecessary setting of c-basic-offset from all
python-mode files.
This was automatically generated using
perl -pi -e 's/; *c-basic-offset: *[0-9]+//'
... on the affected files.
The bulk of these files are moz.build files but there a few others as
well.
MozReview-Commit-ID: 2pPf3DEiZqx
--HG--
extra : rebase_source : 0a7dcac80b924174a2c429b093791148ea6ac204
This patch unifies the include search directories for the breakpad
on B2G and Android, and protects breakpad-internal workarounds against
multiple definition.
As a side-effect of the patch set, no more Gonk-specific headers from
'gonk-include' are requried to build toolkit/ or xpcom/. The related
artifacts are removed by this patch.
MozReview-Commit-ID: E94I2rspDtJ
This patch unifies the include search directories for the breakpad
on B2G and Android, and protects breakpad-internal workarounds against
multiple definition.
As a side-effect of the patch set, no more Gonk-specific headers from
'gonk-include' are requried to build toolkit/ or xpcom/. The related
artifacts are removed by this patch.
MozReview-Commit-ID: E94I2rspDtJ
This commit contains a few things:
* Update our copy of google-breakpad to upstream c53ed143108948eb7e2d7ee77dc8c0d92050ce7c
* Get rid of all but one local patch, fold a few related local patches into one
* Misc build fixup to sync with upstream--adding a few new moz.build files,
source files
* The final bits of unhooking Breakpad from the profiler:
** Revert to only building toolkit/crashreporter if MOZ_CRASHREPORTER.
** Stop building bits of Breakpad that we only needed for the profiler.
** Remove a few bits of profiler code that were used to interface with Breakpad.
** Remove toolkit/crashreporter/breakpad-logging, which was only used to
suppress Breakpad logging for the in-process stackwalker.
* Upstream removed their Android-compat sys/ucontext.h because the Android NDK
added it, but the bionic we're using for Gonk builds is too old, so add a
copy of the previous version of those files to
toolkit/crashreporter/gonk-include to keep Gonk building.
* Consolidate moz.build files under toolkit/crashreporter/google-breakpad/client/linux
--HG--
rename : toolkit/crashreporter/google-breakpad/src/common/pathname_stripper.h => toolkit/crashreporter/google-breakpad/src/processor/pathname_stripper.h
rename : toolkit/crashreporter/google-breakpad/src/common/pathname_stripper_unittest.cc => toolkit/crashreporter/google-breakpad/src/processor/pathname_stripper_unittest.cc
extra : histedit_source : 43e65f5432657f548cac5aa7936461e58454c3b6%2C7b56ccc79d9d58ebde0583d920f3593e25212621
extra : rebase_source : f6dbfb8fb2ba5b27e63b26d57c404962679c7a76
extra : commitid : DMQlXPms868
extra : source : 09fd4f3ab6e764016fe073efb226f03b5969af59
extra : intermediate-source : 16f9d3a6d2ef6a6efd088e3b8eff0a4723daef8f
The patch removes 455 occurrences of FAIL_ON_WARNINGS from moz.build files, and
adds 78 instances of ALLOW_COMPILER_WARNINGS. About half of those 78 are in
code we control and which should be removable with a little effort.
--HG--
extra : rebase_source : 82e3387abfbd5f1471e953961d301d3d97ed2973
Andrea Marchesini
Bevis Tseng
Doug Thayer
Bill McCloskey
Michael Layzell
Stone Shih
Sebastian Hengst
Henry Chang
Carsten "Tomcat" Book
Nathan Froyd
Andreas Farre
Mike Hommey
Benjamin Smedberg
Ben Kelly
Tom Tromey
Thomas Zimmermann
Chris Peterson
Kyle Huey
Wes Kocher
Ted Mielczarek
Nicholas Nethercote
Bobby Holley