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| author | Snehasish Kumar <snehasishk@google.com> | 2022-02-11 16:28:33 -0800 |
|---|---|---|
| committer | Snehasish Kumar <snehasishk@google.com> | 2022-02-14 09:53:45 -0800 |
| commit | 43c2348c5b926df6bdbc5b70efaa35ecdefe12d5 (patch) | |
| tree | ecd3def2c1d2ef0043c2eb5bbfb3ac7982730867 /llvm/lib/Bitcode/Reader/BitcodeAnalyzer.cpp | |
| parent | 14cc41a0206a85d350767f8aff6e02bd4e7dd5d6 (diff) | |
[memprof] Extend the index prof format to include memory profiles.
This patch adds support for optional memory profile information to be
included with and indexed profile. The indexed profile header adds a new
field which points to the offset of the memory profile section (if
present) in the indexed profile. For users who do not utilize this
feature the only overhead is a 64-bit offset in the header.
The memory profile section contains (1) profile metadata describing the
information recorded for each entry (2) an on-disk hashtable containing
the profile records indexed via llvm::md5(function_name). We chose to
introduce a separate hash table instead of the existing one since the
indexing for the instrumented fdo hash table is based on a CFG hash
which itself is perturbed by memprof instrumentation.
Differential Revision: https://reviews.llvm.org/D118653
Diffstat (limited to 'llvm/lib/Bitcode/Reader/BitcodeAnalyzer.cpp')
0 files changed, 0 insertions, 0 deletions