https://bugs.kde.org/show_bug.cgi?id=442061
Bug ID: 442061
Summary: Valgrind: very slow execution under Fedora 34
Product: valgrind
Version: unspecified
Platform: Fedora RPMs
OS: All
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: jsew...@acm.org
Reporter: kuo...@gmail.com
Target Milestone: ---
SUMMARY
I am running valgrind on my PC with dual boot Windows 10 and Fedora 34.
Running the same test on Ubuntu 20.04 (under Windows 10 WSL2) valgrind runs in
less than a second, but on Fedora 34 is very slow, several minutes slow.
On Fedora 34 it looks like the time spent is reading symbols.
This is the part that takes most of the time:
--23524-- Reading syms from /usr/lib64/libstdc++.so.6.0.29
--23524-- Considering
/usr/lib/debug/.build-id/bd/d633ff5da0bba64d19ecf277a9eed7001da127.debug ..
--23524-- .. build-id is valid
--23524-- Considering
/usr/lib/debug/.build-id/bd/../../../../../usr/lib/debug/usr/lib64/../../.dwz/gcc-11.2.1-1.fc34.x86_64
..
--23524-- .. build-id is valid
--23524-- Reading syms from /usr/lib64/libm-2.33.so
--23524-- Considering
/usr/lib/debug/.build-id/c1/784bbe8a93a6e62f74b16105a2076a03b398ac.debug ..
--23524-- .. build-id is valid
--23524-- Reading syms from /usr/lib64/libgcc_s-11-20210728.so.1
--23524-- Considering
/usr/lib/debug/.build-id/46/e10c9ee769c5cfc7cdb638e3ccbc3169c0a949.debug ..
--23524-- .. build-id is valid
--23524-- Considering
/usr/lib/debug/.build-id/46/../../../../../usr/lib/debug/lib64/../.dwz/gcc-11.2.1-1.fc34.x86_64
..
--23524-- .. build-id is valid
--23524-- Reading syms from /usr/lib64/libc-2.33.so
--23524-- Considering
/usr/lib/debug/.build-id/9d/e0f6e78ec16db4c6c167efc6b37466705edeff.debug ..
--23524-- .. build-id is valid
--23524-- Considering
/usr/lib/debug/.build-id/9d/../../../../../usr/lib/debug/lib64/../.dwz/glibc-2.33-20.fc34.x86_64
..
--23524-- .. build-id is valid
STEPS TO REPRODUCE
1. Run valgrind on a simple binary
OBSERVED RESULT
It takes minutes to execute.
EXPECTED RESULT
It should be instant as the program is very simple like "hello world".
SOFTWARE/OS VERSIONS
Linux: 5.13.13-200.fc34.x86_64 #1 SMP Thu Aug 26 17:06:39 UTC 2021 x86_64
x86_64 x86_64 GNU/Linux
ADDITIONAL INFORMATION
Using GCC 11
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