57 lines
2.6 KiB
Plaintext
57 lines
2.6 KiB
Plaintext
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Policy files contains a classification policy for dmprof.py.
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Each line indicates a group to be classified and conditions for classifying
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in the following format.
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Format: <group-name> <region-type> <pattern>
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<group-name> is a name for the group to be classified. Same names can appear
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in the same policy file multiple times. <region-type> represents a type of
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the memory region. It's one of {malloc, mmap, default, optional}. <pattern>
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is a Python-style regular expression to match with calling stack frames.
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For each memory chunks allocated by malloc, its calling stack frame of malloc
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is compared with these classification policies whose <region-type> is 'malloc'
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from the top. If <pattern> of the policy matches the frame, the memory chunk
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is classified into <group-name>. The same way for 'mmap'.
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Policy lines whose <region-type>s are 'optional' and 'default' are used by
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dmprof.py internally. 'optional' policies can be disabled by removing or
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commenting-out.
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Guidelines to write a new policy.
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Better policies would classify memory on a single layer, or simple combination
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of layers. For example,
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- Large-level components (V8, WebKit, ...)
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- Mid-level components (Font, FileAPI, ...)
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- Low-level libraries (StringImpl, HashTable, ...)
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- Mid-level libraries (SharedBuf, XHR, ...)
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For example of combinations,
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- How about SharedBuf in Font API v.s. other APIs?
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- How about Strings in IndexedDB v.s. File APIs?
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Deprecated policies for references.
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total-vm optional optional
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anonymous-vm optional optional
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filemapped-vm optional optional
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other-vm optional optional
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vm-profiler optional optional
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vm-total optional optional
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mmap-v8-heap-new mmap .*v8::.*::ReserveInitialChunk.*
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mmap-v8-heap-coderange mmap .*v8::.*::CodeRange::Setup.*
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mmap-v8-heap-old-evacuate mmap .*v8::.*::OldSpace::.* v8::internal::ScavengingVisitor::EvacuateObject.*
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mmap-v8-heap-old mmap .*v8::.*::OldSpace::.*
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mmap-v8-heap-largeobj mmap .*v8::.*::LargeObjectChunk::New.*
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mmap-v8-heap-other mmap .*VirtualMemory.*
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mmap-v8-heap-other mmap .*v8::internal::OS::Allocate.*
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mmap-v8-nonheap mmap .*v8::.*
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mmap-webkit mmap .*(WTF::|WebCore::|WebKit::).*
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mmap-sqlite mmap .*sqlite3MemMalloc.*
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mmap-pl-arena mmap .*PL_ArenaAllocate.*
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mmap-sk mmap .*sk_malloc_flags.*
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mmap-total-record-vm default default
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