Re: Filter option should follow a tracer option

[Adrian Hunter <adrian.hunter@intel.com>]

On 23/08/17 11:51, Jack Henschel wrote:
>> Adrian Hunter <adrian.hunter@intel.com> hat am 23. August 2017 um 08:06 geschrieben:
>>
>>
>> On 22/08/17 22:00, Arnaldo Carvalho de Melo wrote:
>>> Em Fri, Aug 18, 2017 at 11:43:51AM +0200, Jack Henschel escreveu:
>>>> Hi everyone,
>>>>
>>>> I'm experimenting with Intel PT and perf, but I am currently stuck at getting filters to work with `perf record`.
>>>>
>>>> I have the following command:
>>>>> perf record -e intel_pt// --filter 'filter main @ /bin/sleep' /bin/sleep 1
>>>> But it throws this error message:
>>>>> --filter option should follow a -e tracepoint or HW tracer option
>>>>
>>>> Maybe this is a trivial mistake, but I don't understand the error, because as far as I'm concerned the --filter options *is* following a -e HW tracer option.
>>>>
>>>> I'm using perf version 4.9.30 with kernel 4.9.30-2+deb9u3 on Debian 9 Stretch.
>>
>> It looks like either your CPU does not support Intel PT at all, or it does not support address filtering.
> 
> My CPU (Xeon CPU E5-2680 v4) supports Intel PT (intel_pt flag is present in /proc/cpuinfo), but this is not an issue with Intel PT. Here are some more examples (with various syntaxes):

I think that is Broadwell which doesn't have address filtering.

> 
>> $ perf list | grep -E 'intel_pt|branch-loads|cache-misses'
>>  cache-misses                                       [Hardware event]
>>  branch-loads                                       [Hardware cache event]
>>  cache-misses OR cpu/cache-misses/                  [Kernel PMU event]
>>  intel_pt//                                         [Kernel PMU event]
>> $ perf record --event intel_pt// --exclude-perf -a
>> --exclude-perf option should follow a -e tracepoint option
>> $ perf record --event=branch-loads --filter 'filter main @ /bin/sleep' -- /bin/sleep 1
>> --filter option should follow a -e tracepoint or HW tracer option
>> $ perf record -e cache-misses --filter 'filter main @ /bin/sleep' -- /bin/sleep 1
>> --filter option should follow a -e tracepoint or HW tracer option
> 
>> Have you checked the value of /sys/bus/event_source/devices/intel_pt/nr_addr_filters ?
> I don't have that file:

Which definitely means address filtering is not supported.  That is
mentioned in the man page for 'perf record'.