On 8/12/15 2:37 AM, Kaixu Xia wrote:
There are two improvements in this patch:
  1. Fix the build warnings;
  2. Add function read_trace_pipe() to print the result on
     the screen;

Before this patch, we can get the result through /sys/kernel/de
bug/tracing/trace_pipe and get nothing on the screen.
By applying this patch, the result can be printed on the screen.
   $ ./tracex6
        ...
          tracex6-705   [003] d..1   131.428593: : CPU-3   19981414
             sshd-683   [000] d..1   131.428727: : CPU-0   221682321
             sshd-683   [000] d..1   131.428821: : CPU-0   221808766
             sshd-683   [000] d..1   131.428950: : CPU-0   221982984
             sshd-683   [000] d..1   131.429045: : CPU-0   222111851
          tracex6-705   [003] d..1   131.429168: : CPU-3   20757551
             sshd-683   [000] d..1   131.429170: : CPU-0   222281240
             sshd-683   [000] d..1   131.429261: : CPU-0   222403340
             sshd-683   [000] d..1   131.429378: : CPU-0   222561024
        ...

Signed-off-by: Kaixu Xia<xiaka...@huawei.com>

thanks!
Acked-by: Alexei Starovoitov <a...@plumgrid.com>

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