On Thu, Jul 25, 2013 at 08:34:41AM -0600, Jens Axboe wrote:
> On 07/24/2013 12:21 AM, Han Pingtian wrote:
> > I think I have found what's wrong. After 'make distclean' then 'make',
> > the problem of segfault has gone. There were some object files
> > compiled on another machine. The recompilation fixed it. But looks like
> > the ATBU call dosen't work on power7 system.
>
> So the recompilation fixed the segfault, but not the illegal instruction
> due to ATBU?
Yes. If we set unlimit core dump, fio will generate a core with
backtrace like this one:
#0 mfspr (envp=<value optimized out>) at arch/arch-ppc.h:55
55 asm volatile("mfspr %0,%1": "=r" (val) : "K" (reg));
Missing separate debuginfos, use: debuginfo-install glibc-2.12-1.107.el6.ppc64 libaio-0.3.107-10.el6.ppc64
(gdb) bt
#0 mfspr (envp=<value optimized out>) at arch/arch-ppc.h:55
#1 get_cpu_clock (envp=<value optimized out>) at arch/arch-ppc.h:71
#2 atb_child (envp=<value optimized out>) at arch/arch-ppc.h:88
#3 atb_clocktest (envp=<value optimized out>) at arch/arch-ppc.h:98
#4 arch_init (envp=<value optimized out>) at arch/arch-ppc.h:116
#5 initialize_fio (envp=<value optimized out>) at libfio.c:248
#6 0x0000000010067294 in main (argc=<value optimized out>, argv=<value optimized out>,
envp=<value optimized out>) at fio.c:33
Apologize for late to reply.
--
To unsubscribe from this list: send the line "unsubscribe fio" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
