Re: -fno-omit-frame-pointer

[Mark Nelson <mnelson@redhat.com>]

On 02/21/2015 05:27 PM, Mark Nelson wrote:
> I've still had the best luck using DWARF though.  I was able to get much
> better stack traces with it.  A semi-modern kernel with libunwind
> support in perf is needed though.  I just checked one of our RHEL7 and
> it sadly doesn't look like they have it linked.  We really should hassle
> them to get this in.  Perf on our Ubuntu 14.04 does use libunwind,
> primarily due to the kernel bug we submitted:
>
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1248289

FWIW, I followed up with the RHEL7 kernel guys who pointed out that 
while RHEL 7.0 doesn't have dwarf support in perf, 7.1 does, and it's 
using what appears to be a better libdw unwind implementation:

http://lwn.net/Articles/579508/

>
> Mark
> --
> To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html