On Mon, Apr 24, 2017 at 08:18:17PM +0200, Karl Pettersson wrote: > I run 64-bit Ubuntu as a vmm guest, according to: > https://gist.github.com/reyk/6d369c5c0bd0c76f4906f83933f3bb71 > > It works well for the most part; I have removed cloud-init becaue I do > not need it. However, I used Python 2.7 with numpy 1.12 (installed via Pip), > and experienced crashes which seemed to be related to AVX2 > instructions, even though the cpu should support this, according to > /proc/cpuinfo. (cf. https://github.com/numpy/numpy/issues/8128). For > example, when I tried to reproduce this simple chart, > https://matplotlib.org/examples/lines_bars_and_markers/fill_demo.html, > this made Python exit with illegal instruction, according to gdb: > > Program received signal SIGILL, Illegal instruction. 0x00007ffff3ce5d56 > in UBYTE_less_equal_avx2 (args=0x7fffffffba50, dimensions=<optimized > out>, steps=<optimized out>, __NPY_UNUSED_TAGGEDfunc=<optimized out>) at > numpy/core/src/umath/loops.c.src:899 > > Downgrading to numpy 1.11.1~rc1 (the version available from as an Ubuntu > package) seems to have fixed the issue. >
we filter out avx2 from the guest, for now.
