[dpdk-users] Broken hash table functions with CFLAGS -O3

Dmitriy Yakovlev bombermag at gmail.com
Fri Jan 15 02:20:03 CET 2016

I trying to use hash tables for adding struct ip:port as key.
When trying to add duplicated key it's successfuly added second time, not
always, but sometimes.
Please see this youtube video, where I'm demonstrating this bug:
Code on github: https://github.com/BombermaG/bug-app

When using CFLAGS -O2 this problem cannot be repeated.
It's problem with -O3 flag and I must use O2 or how can I solve it?
Thank you for helping.
(Sorry if this message double posting).

Spec info. Tell me, if you need more info.
dpdk 2.2.0

Linux 3.10.0-229.el7.x86_64 #1 SMP Fri Mar 6 11:36:42 UTC 2015 x86_64
x86_64 x86_64 GNU/Linux

gcc -v
Using built-in specs.
Target: x86_64-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla
--enable-bootstrap --enable-shared --enable-threads=posix
--enable-checking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-gnu-unique-object
--enable-linker-build-id --with-linker-hash-style=gnu
--enable-plugin --enable-initfini-array --disable-libgcj
--enable-gnu-indirect-function --with-tune=generic --with-arch_32=x86-64
Thread model: posix
gcc version 4.8.5 20150623 (Red Hat 4.8.5-4) (GCC)

Intel(R) Xeon(R) CPU E5-2643 v2 @ 3.50GHz

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