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[AIX] Limit extract_symbols.py's Pools Size to 8

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On AIX, `extract_symbols.py`'s default pool size may be too big for the logical partition(LPAR)'s allocated memory, and may lead to intermittent IO errors. This patch limits the pool size to 8 to avoid such errors.

Reviewed By: daltenty, thieta

Differential Revision: https://reviews.llvm.org/D157884
This commit is contained in:
Qiongsi Wu 2023-08-21 09:48:12 -04:00
parent 57c090b2ea
commit 3bcce9ca22
1 changed files with 7 additions and 1 deletions
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8
llvm/utils/extract_symbols.py
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@ -22,6 +22,7 @@ import os
import subprocess
import multiprocessing
import argparse
import platform
# Define a function which extracts a list of pairs of (symbols, is_def) from a
# library using llvm-nm becuase it can work both with regular and bitcode files.
@ -428,7 +429,12 @@ if __name__ == "__main__":
# Extract symbols from libraries in parallel. This is a huge time saver when
# doing a debug build, as there are hundreds of thousands of symbols in each
# library.
pool = multiprocessing.Pool()
# FIXME: On AIX, the default pool size can be too big for a logical
# partition's allocated memory, and can lead to an out of memory
# IO error. We are setting the pool size to 8 to avoid such
# errors at the moment, and will look for a graceful solution later.
pool = multiprocessing.Pool(8) if platform.system() == "AIX" \
else multiprocessing.Pool()
try:
# Only one argument can be passed to the mapping function, and we can't
# use a lambda or local function definition as that doesn't work on