Isolate is not going to retain a CPU profiler.
The client will be creating an instance of profiler when needed.
Deprectate v8::Isolate::GetCpuProfiler()
BUG=v8:4789
Review-Url: https://codereview.chromium.org/2117343006
Cr-Commit-Position: refs/heads/master@{#37613}
We want to eventually move the profiling functionality out of V8 as library,
this patch exposes TickSample and its APIs in v8-profiler.h so that when
embedders use library, they can have more details.
Minor change: Rename tick-sample.[h|cc] to simulator-helper.[h|cc].
BUG=v8:4789
LOG=N
Review-Url: https://codereview.chromium.org/2105943002
Cr-Commit-Position: refs/heads/master@{#37564}
Currently there are two logic in Ticker, one is to try to request a
pre-allocated TickSample from CpuProfiler and then initialize it, and if the
request fails, it will initialize a local TickSample. The other is it will pass
an initialized TickSample to Profiler to log into v8.log.
This patch splits Ticker into two samplers, the first one remains in log.cc to
collect samples and pass to Profiler for logging, the second one will be called
by ProfilerEventsProcessor, and only use the circular queue only.
BUG=v8:4789
LOG=N
Review-Url: https://codereview.chromium.org/2108393002
Cr-Commit-Position: refs/heads/master@{#37506}
Currently CpuProfiler is a subclass of CodeEventListener, it listens code events
from Logger, constructs and stores CodeEventsContainer. This patch is part of
the effort to split the logic of CodeEventListener as ProfilerListener out of
the profiling functionality logic in CpuProfiler. A ProfilerListener will listen
to code events, construct code event to CodeEventsContainer and pass it to code
event handler.
The reason we refactor CpuProfiler is that eventually we want to move
CpuProfiler as part of sampler library and code event listener should stay
inside V8.
Main changes:
1. Refactored CpuProfiler into two parts, the CpuProfiler with profling
functionality and the ProfilerListener listening to code events from Logger.
2. Created CodeEventObserver and made CpuProfiler inherit from it.
ProfilerListener will have a list of observers and call CodeEventHandler once a
code event is created.
3. Moved code entry list from CodeEntry to ProfilerListener.
Minor changes:
1. Moved static code entry as part of CodeEntry.
2. Added ProfilerListener to Logger.
BUG=v8:4789
Committed: https://crrev.com/cb59fc1facc9b390e2c7544b4da56a4e0a9b3222
Review-Url: https://codereview.chromium.org/2053523003
Cr-Original-Commit-Position: refs/heads/master@{#37112}
Cr-Commit-Position: refs/heads/master@{#37195}
Reason for revert:
MIPS compilation error.
Original issue's description:
> Refactor CpuProfiler.
>
> Currently CpuProfiler is a subclass of CodeEventListener, it listens code events
> from Logger, constructs and stores CodeEventsContainer. This patch is part of
> the effort to split the logic of CodeEventListener as ProfilerListener out of
> the profiling functionality logic in CpuProfiler. A ProfilerListener will listen
> to code events, construct code event to CodeEventsContainer and pass it to code
> event handler.
>
> The reason we refactor CpuProfiler is that eventually we want to move
> CpuProfiler as part of sampler library and code event listener should stay
> inside V8.
>
> Main changes:
> 1. Refactored CpuProfiler into two parts, the CpuProfiler with profling
> functionality and the ProfilerListener listening to code events from Logger.
> 2. Created CodeEventObserver and made CpuProfiler inherit from it.
> ProfilerListener will have a list of observers and call CodeEventHandler once a
> code event is created.
> 3. Moved code entry list from CodeEntry to ProfilerListener.
>
> Minor changes:
> 1. Moved static code entry as part of CodeEntry.
> 2. Added ProfilerListener to Logger.
>
> BUG=v8:4789
>
> Committed: https://crrev.com/cb59fc1facc9b390e2c7544b4da56a4e0a9b3222
> Cr-Commit-Position: refs/heads/master@{#37112}
TBR=alph@chromium.org,jochen@chromium.org,yangguo@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4789
Review-Url: https://codereview.chromium.org/2079273003
Cr-Commit-Position: refs/heads/master@{#37113}
Currently CpuProfiler is a subclass of CodeEventListener, it listens code events
from Logger, constructs and stores CodeEventsContainer. This patch is part of
the effort to split the logic of CodeEventListener as ProfilerListener out of
the profiling functionality logic in CpuProfiler. A ProfilerListener will listen
to code events, construct code event to CodeEventsContainer and pass it to code
event handler.
The reason we refactor CpuProfiler is that eventually we want to move
CpuProfiler as part of sampler library and code event listener should stay
inside V8.
Main changes:
1. Refactored CpuProfiler into two parts, the CpuProfiler with profling
functionality and the ProfilerListener listening to code events from Logger.
2. Created CodeEventObserver and made CpuProfiler inherit from it.
ProfilerListener will have a list of observers and call CodeEventHandler once a
code event is created.
3. Moved code entry list from CodeEntry to ProfilerListener.
Minor changes:
1. Moved static code entry as part of CodeEntry.
2. Added ProfilerListener to Logger.
BUG=v8:4789
Review-Url: https://codereview.chromium.org/2053523003
Cr-Commit-Position: refs/heads/master@{#37112}
The patch introduces a dedicated dispatching class for JIT code events. It is
set as a helper on the isolate.
This allows classes across v8 to break their dependency on Logger and CpuProfiler.
These two became just regular clients of the dispatcher.
BUG=v8:4789
Review-Url: https://codereview.chromium.org/2061623002
Cr-Commit-Position: refs/heads/master@{#37005}
This patch does five things:
1. Extracts sampler as libsampler to provide sampling functionality support.
2. Makes SampleStack virtual so embedders can override the behaviour of sample collecting.
3. Removes sampler.[h|cc].
4. Moves sampling thread into log.cc as workaround to keep the --prof functionality.
5. Creates SamplerManager to manage the relationship between samplers and threads.
The reason we port hashmap.h is that in debug mode, STL containers are using
mutexes from a mutex pool, which may lead to deadlock when using asynchronously
signal handler.
Currently libsampler is used in V8 temporarily.
BUG=v8:4789
LOG=n
Committed: https://crrev.com/06cc9b7c176a6223971deaa9fbcafe1a05058c7b
Cr-Commit-Position: refs/heads/master@{#36527}
Review-Url: https://codereview.chromium.org/1922303002
Cr-Commit-Position: refs/heads/master@{#36532}
Reason for revert:
V8 Linux64 TSAN failure because ThreadSanitizer indicated data race.
Original issue's description:
> Create libsampler as V8 sampler library.
>
> This patch does five things:
>
> 1. Extracts sampler as libsampler to provide sampling functionality support.
> 2. Makes SampleStack virtual so embedders can override the behaviour of sample collecting.
> 3. Removes sampler.[h|cc].
> 4. Moves sampling thread into log.cc as workaround to keep the --prof functionality.
> 5. Creates SamplerManager to manage the relationship between samplers and threads.
>
> The reason we port hashmap.h is that in debug mode, STL containers are using
> mutexes from a mutex pool, which may lead to deadlock when using asynchronously
> signal handler.
>
> Currently libsampler is used in V8 temporarily.
>
> BUG=v8:4789
> LOG=n
>
> Committed: https://crrev.com/06cc9b7c176a6223971deaa9fbcafe1a05058c7b
> Cr-Commit-Position: refs/heads/master@{#36527}
TBR=jochen@chromium.org,alph@chromium.org,fmeawad@chromium.org,yangguo@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4789
Review-Url: https://codereview.chromium.org/2000323007
Cr-Commit-Position: refs/heads/master@{#36529}
This patch does five things:
1. Extracts sampler as libsampler to provide sampling functionality support.
2. Makes SampleStack virtual so embedders can override the behaviour of sample collecting.
3. Removes sampler.[h|cc].
4. Moves sampling thread into log.cc as workaround to keep the --prof functionality.
5. Creates SamplerManager to manage the relationship between samplers and threads.
The reason we port hashmap.h is that in debug mode, STL containers are using
mutexes from a mutex pool, which may lead to deadlock when using asynchronously
signal handler.
Currently libsampler is used in V8 temporarily.
BUG=v8:4789
LOG=n
Review-Url: https://codereview.chromium.org/1922303002
Cr-Commit-Position: refs/heads/master@{#36527}
This completely removes any potential for a side-channel between the
various compiler backends and the profiler. The CompilationInfo is no
longer passed.
R=yangguo@chromium.org
Review-Url: https://codereview.chromium.org/1970193002
Cr-Commit-Position: refs/heads/master@{#36230}
Add support to log source position offsets to the profiler. As part of
this change PositionsRecorder is split into two, with the subset needed
by log.cc moved into log.h and the remainder kept in assembler.h as
AssemblerPositionsRecorder. The interpreter's source position table
builder is updated to log positions when the profiler is active.
BUG=v8:4766
LOG=N
Review URL: https://codereview.chromium.org/1737043002
Cr-Commit-Position: refs/heads/master@{#34416}
Adds support for cpu profiler logging to the interpreter. Modifies the
the API to be passed AbstractCode objects instead of Code objects, and
adds extra functions to AbstractCode which is required by log.cc and
cpu-profiler.cc.
The main change in sampler.cc is to determine if a stack frame is an
interpreter stack frame, and if so, use the bytecode address as the pc
for that frame. This allows sampling of bytecode functions. This
requires adding support to SafeStackIterator to determine if a frame is
interpreted, which we do by checking the PC against pre-stored addresses
for the start and end of interpreter entry builtins.
Also removes CodeDeleteEvents which are dead code and haven't
been reported for some time.
Still to do is tracking source positions which will be done in a
followup CL.
BUG=v8:4766
LOG=N
Review URL: https://codereview.chromium.org/1728593002
Cr-Commit-Position: refs/heads/master@{#34321}
Recent flake happened bacause all the samples landed into native code.
The patch makes sure we collect enough JS samples.
BUG=v8:4751
LOG=N
Review URL: https://codereview.chromium.org/1695663002
Cr-Commit-Position: refs/heads/master@{#33953}
Do not rely on elapsed time to collect enough samples.
Use CollectSample API function instead.
Remove checks for extra functions present in a profile, as
there in fact can be lots of native support functions.
BUG=v8:2999
LOG=N
Review URL: https://codereview.chromium.org/1665303004
Cr-Commit-Position: refs/heads/master@{#33822}
There might be several ExternalCallbackScope's created
during the native callback. Remove the assert that is not
aligned with that.
Moreover this iterator must work for any kind of
stacks including corrupted ones.
BUG=v8:4705
LOG=N
Review URL: https://codereview.chromium.org/1663193003
Cr-Commit-Position: refs/heads/master@{#33751}
It allows embedder to inject a stack sample on demand.
BUG=chromium:579191
LOG=N
Review URL: https://codereview.chromium.org/1631043002
Cr-Commit-Position: refs/heads/master@{#33527}
Tick event processor should not stay in a tight loop
when there's nothing to do. It can go sleep until next sample event.
LOG=N
BUG=v8:3967
Review URL: https://codereview.chromium.org/1118533003
Cr-Commit-Position: refs/heads/master@{#28211}
Add a finalize incremental marking mode for CollectAllGarbage to finalize incremental marking when incremental marking is in progress, but we want a full gc at a given CollectAllGarbage call site.
Default mode for CollectAllGarbage is finalize incremental marking and perform a full GC.
BUG=
Review URL: https://codereview.chromium.org/1082973003
Cr-Commit-Position: refs/heads/master@{#27831}
it is the last patch of https://codereview.chromium.org/1012633002
All that we need here is to push the collected info to the profiler
and convert it into actionable information about deopt.
On the Next: get the info accessible by embedder.
BUG=chromium:452067
LOG=n
TEST=DeoptAtFirstLevelInlinedSource, DeoptAtSecondLevelInlinedSource, DeoptUntrackedFunction
Review URL: https://codereview.chromium.org/1013143003
Cr-Commit-Position: refs/heads/master@{#27403}
We use slightly different schema for JumpTable on arm64 than for x64.
We do a branch (B) to the JumpTable from the code,
then a branch (B) to the end of jump table code
and then branch to the deoptimizer code with putting
the return address into lr register (Call which is actually Blr).
As a result the 'from' address in Deoptimizer always points to
the end of JumpTable code and we can get nothing from this information.
0) I moved save_doubles and needs_frame code out of for_loop.
1) I replaced B commands with Bl so we put different return addresses
to lr register for the different jump table entries and replaced
the final Call with Br which do not touch lr register.
Also I removed the last_entry check so we will always do the Bl
even for the last entry because we need the right address in lr.
I don't think that this will affect the performance because it
just one more branch for entire deopt mechanics.
BUG=chromium:452067
LOG=n
Review URL: https://codereview.chromium.org/984893003
Cr-Commit-Position: refs/heads/master@{#27094}
The original code always returned the first entry from RelocInfo that matched with
bailout_id. But we may have a few different deopt reasons for one bailout_id.
So we need to get the one which matches with a particular call from JumpTable.
We can do this by checking not 'target_address' (it maps to bailout_id)
but 'from' address which maps to a particular JumpTable entry.
The test was reworked so it tests identical functions against different reasons.
BUG=chromium:452067
LOG=n
Review URL: https://codereview.chromium.org/984773003
Cr-Commit-Position: refs/heads/master@{#27076}
Reason for revert:
Some tests still flaky
Original issue's description:
> CpuProfiler: enable tests except four failing tests.
>
> Four tests are failing due to a problem with no frame ranges.
>
> BUG=
> LOG=n
>
> Committed: https://crrev.com/2be160e726f2be6272b77e53fbd556aded6024f1
> Cr-Commit-Position: refs/heads/master@{#27035}
TBR=yurys@chromium.org,svenpanne@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=
Review URL: https://codereview.chromium.org/987553005
Cr-Commit-Position: refs/heads/master@{#27037}
Four tests are failing due to a problem with no frame ranges.
BUG=
LOG=n
Review URL: https://codereview.chromium.org/976203003
Cr-Commit-Position: refs/heads/master@{#27035}
The root of problem is the fact that we don't track the position of 'this' statement but use them when visit compare statement.
As a result we have -1 as the position of left expression and the resulting relative position is negative and doesn't fit into BitField.
BUG=452067
TEST=test-cpu-profiler/SourceLocation
LOG=n
Review URL: https://codereview.chromium.org/940593002
Cr-Commit-Position: refs/heads/master@{#26741}
1) create beefy RelocInfo table when cpu profiler is active, so if a function
was optimized when profiler was active RelocInfo would get separate DeoptInfo
for the each deopt case.
2) push DeoptInfo from CodeEntry to ProfileNode.
When deopt happens we put the info collected on #1 into CodeEntry and record stack sample.
On the sampling thread we grab the deopt data and append it to the corresponding ProfileNode deopts list.
Sample profile dump.
[Top down]:
0 (root) 0 #1
1 29 #2
1 test 29 #3
2 opt_function 29 #4
2 opt_function 29 #5
deopted at 118 with reason 'not a heap number'
deopted at 137 with reason 'division by zero'
BUG=452067
LOG=n
Committed: https://crrev.com/ce8701b247d3c6604f24f17a90c02d17b4417f54
Cr-Commit-Position: refs/heads/master@{#26615}
Review URL: https://codereview.chromium.org/919953002
Cr-Commit-Position: refs/heads/master@{#26630}
Reason for revert:
static initializers broke the build
Original issue's description:
> CPUProfiler: Push deopt reason further to ProfileNode.
>
> 1) create beefy RelocInfo table when cpu profiler is active, so if a function
> was optimized when profiler was active RelocInfo would get separate DeoptInfo
> for the each deopt case.
>
> 2) push DeoptInfo from CodeEntry to ProfileNode.
> When deopt happens we put the info collected on #1 into CodeEntry and record stack sample.
> On the sampling thread we grab the deopt data and append it to the corresponding ProfileNode deopts list.
>
> Sample profile dump.
> [Top down]:
> 0 (root) 0 #1
> 1 29 #2
> 5 test 29 #3
> 3 opt_function 29 #4
> deopted at 52 with reason 'not a heap number'
> deopted at 71 with reason 'division by zero'
>
> BUG=452067
> LOG=n
>
> Committed: https://crrev.com/ce8701b247d3c6604f24f17a90c02d17b4417f54
> Cr-Commit-Position: refs/heads/master@{#26615}
TBR=jarin@chromium.org,svenpanne@chromium.org,yurys@chromium.org,alph@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=452067
Review URL: https://codereview.chromium.org/915173005
Cr-Commit-Position: refs/heads/master@{#26616}
1) create beefy RelocInfo table when cpu profiler is active, so if a function
was optimized when profiler was active RelocInfo would get separate DeoptInfo
for the each deopt case.
2) push DeoptInfo from CodeEntry to ProfileNode.
When deopt happens we put the info collected on #1 into CodeEntry and record stack sample.
On the sampling thread we grab the deopt data and append it to the corresponding ProfileNode deopts list.
Sample profile dump.
[Top down]:
0 (root) 0 #1
1 29 #2
5 test 29 #3
3 opt_function 29 #4
deopted at 52 with reason 'not a heap number'
deopted at 71 with reason 'division by zero'
BUG=452067
LOG=n
Review URL: https://codereview.chromium.org/919953002
Cr-Commit-Position: refs/heads/master@{#26615}
1) Deoptimizer::Reason was replaced with Deoptimizer::DeoptInfo
because it also has raw position. Also the old name clashes with DeoptReason enum.
2) c_entry_fp assignment call was added to EntryGenerator::Generate
So we can calculate sp and have a chance to record the stack for the deopting function.
btw it makes the test stable.
3) new kind of CodeEvents was added to cpu-profiler
4) GetDeoptInfo method was extracted from PrintDeoptLocation.
So it could be reused in cpu profiler.
BUG=452067
LOG=n
Review URL: https://codereview.chromium.org/910773002
Cr-Commit-Position: refs/heads/master@{#26545}
