On 3/23/20 9:15 AM, Alex Bennée wrote: > While debugging check-acceptance failures I found an instability in > the mips64el test case. Briefly the test case: > > retry.py -n 100 -c -- ./mips64el-softmmu/qemu-system-mips64el \ > -display none -vga none -serial mon:stdio \ > -machine malta -kernel ./vmlinux-4.7.0-rc1.I6400 \ > -cpu I6400 -smp 8 -vga std \ > -append "printk.time=0 clocksource=GIC console=tty0 console=ttyS0 > panic=-1" \ > --no-reboot > > Reports about a 9% failure rate: > > Results summary: > 0: 91 times (91.00%), avg time 5.547 (0.45 varience/0.67 deviation) > -6: 9 times (9.00%), avg time 3.394 (0.02 varience/0.13 deviation) > Ran command 100 times, 91 passes > > When re-run with "--accel tcg,thread=single" the instability goes > away. > > Results summary: > 0: 100 times (100.00%), avg time 17.318 (249.76 varience/15.80 deviation) > Ran command 100 times, 100 passes > > Which seems to indicate there is some aspect of the MIPS MTTCG fixes > that has been missed. Ideally we would fix that but I'm afraid I don't > have time to investigate and am not super familiar with the > architecture anyway. In lieu of someone tracking down the failure lets > disable it for now. > > Signed-off-by: Alex Bennée <alex.ben...@linaro.org> > Acked-by: Philippe Mathieu-Daudé <f4...@amsat.org> > Cc: Aleksandar Markovic <aleksandar.qemu.de...@gmail.com> > Cc: Aurelien Jarno <aurel...@aurel32.net> > Cc: Aleksandar Rikalo <aleksandar.rik...@rt-rk.com>
Acked-by: Richard Henderson <richard.hender...@linaro.org> r~
