On 1/13/14, 11:54 AM, "Don Zickus" <dzic...@redhat.com> wrote:
>On Sat, Jan 11, 2014 at 08:32:14PM -0800, Gaurav Jain wrote:
>> Anon records usually do not have the 'execname' entry. However if they
>>are on
>> the heap, the execname shows up as '[heap]'. The fix considers any
>>executable
>> entries in the map that do not have a name or are on the heap as anon
>>records
>> and sets the name to '//anon'.
>>
>> This fixes JIT profiling for records on the heap.
>
>I guess I don't understand the need for this fix. It seems breaking out
>//anon vs. [heap] would be useful. Your patch is saying otherwise. Can
>give a description of the problem you are trying to solve?
Thank you for looking at the patch.
We generate a perf map file which includes certain JIT¹ed functions that
show up as [heap] entries. As a result, I included the executable heap
entries as anon pages so that it would be handled in
util/map.c:map__new(). The alternative would be to handle heap entries in
map__new() directly, however I wasn¹t sure if this would break something
as it seems that heap and stack entries are expected to fail all
map__find_* functions. Thus I considered executable heap entries as
//anon, but perhaps there is a better way.
>Also style issue below..
>
>>
>> Signed-off-by: Gaurav Jain <gj...@fb.com>
>> Cc: Ingo Molnar <mi...@kernel.org>
>> Cc: Jiri Olsa <jo...@redhat.com>
>> Cc: Paul Mackerras <pau...@samba.org>
>> Cc: Peter Zijlstra <a.p.zijls...@chello.nl>
>> Cc: Don Zickus <dzic...@redhat.com>
>> Cc: Arun Sharma <asha...@fb.com>
>> ---
>> tools/perf/util/event.c | 5 ++---
>> 1 file changed, 2 insertions(+), 3 deletions(-)
>>
>> diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
>> index bb788c1..ae9c55b 100644
>> --- a/tools/perf/util/event.c
>> +++ b/tools/perf/util/event.c
>> @@ -224,10 +224,9 @@ static int
>>perf_event__synthesize_mmap_events(struct perf_tool *tool,
>> continue;
>>
>> event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
>> - }
>> -
>> - if (!strcmp(execname, ""))
>> + } if (!strcmp(execname, "") || !strcmp(execname, "[heap]")) {
>
>The '} if' part should seperate the 'if' on to its own line (unless you
>meant an 'else' in there).
Bah yes, I intended 'else if'. I apologize for that. Does the fact that I
filtered anon entries to only those marked as executable break the
existing behavior?
Thanks,
Gaurav
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
