Hi, On Wed, 26 May 2021 at 21:38, Professor Pro <annivation@xxxxxxxxx> wrote: > > I'm missing reason why fio can not be built statically with both libaio > and posixaio > > Here is simplest way to reproduce on clear linux using docker ubuntu image: > > echo ' > url=https://brick.kernel.dk/snaps/fio-3.26.tar.gz > libaio=https://pagure.io/libaio/archive/libaio-0.3.112/libaio-libaio-0.3.112.tar.gz > apt-get update > apt-get install libc6-dev build-essential autoconf autoconf make wget -y -q > work=/build/fio-src <snip> > # build libaio > cd lib* > make prefix=/usr/local install > cd ../fio* > > # build fio > ./configure --prefix=/usr/local --build-static | tee configure.log > make -j && make install && echo "SUCCESS. $(fio --version) engines:" && > fio --enghelp | tail -n +2 | sort > cat configure.log | grep "AIO" <snip> > Linux AIO support yes > Linux AIO support rw flags yes > POSIX AIO support no > POSIX AIO support needs -lrt no > POSIX AIO fsync no > Solaris AIO support no > > > According to man [https://man7.org/linux/man-pages/man7/aio.7.html] > posix aio was introduced in glibc 2.1. > Another words, libc6-dev 2.31 is preinstalled but posixaio is not > available for static build? > > Can we build fio statically with both libaio and posixaio? Probably not both without a large amount of effort. Whether you can build fio statically with Linux AIO depends entirely on whether you have a static (.a) version of of libaio library in your library search path. Since you're building libaio by hand it's up to you to check the paths/fiddle with environment variables... FWIW I thought Debian-like distros like Ubuntu actually shipped a static libaio in libaio-dev (e.g. https://packages.ubuntu.com/focal/amd64/libaio-dev/filelist ) so I'm unsure why you need to build your own... For the POSIX AIO failure you would have to look through config.log. My guess is that when you use posixaio on Linux it also needs libpthread to be available and perhaps this is something that doesn't take place when doing a static build (i.e. try adding -lpthread after -lrt in the fio configure script). Note that the posixaio I/O engine on Linux is somewhat slow and won't achieve high concurrency when multiple I/Os are targeting the same file descriptor. -- Sitsofe
