The time taken to return from a system() call gradually increases as more calls are made over time.
$ configure --enable-board=intel-x86-64 \ --enable-rootfs=glibc_std --enable-kernel=standard \ --with-package=gdb --enable-jobs=1 --enable-parallel-pkgbuilds=8 \ --enable-rm-work=yes --enable-rm-oldimgs=yes \ --enable-checkout-all-layers=yes --enable-reconfig \ --enable-ccache=yes --with-ccache-dir=/path/to/ccache \ --with-sstate-dir=/path/to/sstate --with-rcpl-version=0017 $ make fs Deploy to target, eg matxm reference board. Run the attached python test case: # python sx_model4.py The delta time (column 2) shows a steadily increasing value (ignoring outliers).