[Gluster-devel] glusterfs and flamegraph

[Vijay Bellur]

On 01/26/2014 08:54 AM, yinyin wrote:
> Hi,all:
> I have used FlameGraph to test glusterfs-3.4.2, trace with simple dd.
> found that, a lot of cpu consume on frame_fill_groups, My questions:
> 1. what’s the func of frame_fill_groups?

frame_fill_groups() reads /proc/<pid>/status to identify the auxiliary 
groups associated with pid.

> 2. should it disable by default?

It can be disabled by default if none of your applications running on 
the gluster mount are dependent on auxiliary groups for performing I/O 
on the dataset within a gluster volume.


-Vijay