I get it.  Is the timestamp for wall-clock or not???    What is the
counting unit of timestamp?  Seconds??

         swapper     0 [000] 1591103.081337: instructions:          c1022ae6 int
         swapper     0 [000] 1591103.081341: instructions:          c1022ae6 int
         swapper     0 [000] 1591103.081343: instructions:          c1022ae6 int
         swapper     0 [000] 1591103.081345: instructions:          c1022ae6 int
         swapper     0 [000] 1591103.081348: instructions:          c1036a26 __t
         swapper     0 [000] 1591103.081353: cycles:          c1035e68 native_wr
         swapper     0 [000] 1591103.081355: cycles:          c1035e68 native_wr
         swapper     0 [000] 1591103.081357: cycles:          c1035e68 native_wr
         swapper     0 [000] 1591103.081359: cycles:          c1035e68 native_wr
         swapper     0 [000] 1591103.081362: cycles:          c101909c mwait_id

Best wishes.
Yours,
Wang Peipei
Best wishes.
Yours,
Wang Peipei


On Sat, Aug 10, 2013 at 12:43 AM, Andi Kleen <a...@firstfloor.org> wrote:
> Peipei Wang <wangpeipei...@gmail.com> writes:
>
>> I am trying to understand something about perf record. In its guide,
>> perf record could use option -T to generate sample timestamp, and then
>> use perf report -D to get them.
>>
>> However, what I get from perf report -D is something as follows. Does
>> anyone have an idea what content of perf.data  means?
>
> Use "perf script" to display the data instead.
>
> -Andi
>
> --
> a...@linux.intel.com -- Speaking for myself only
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