perf tools: Fix find tids routine by excluding "." and ".."
Introduce a filter function to skip "." and ".." directories when calculating tid number, otherwise tid 0 will be included in the all_tid result array. Cc: Ingo Molnar <mingo@elte.hu> LKML-Reference: <4C185F68.1020505@cn.fujitsu.com> Signed-off-by: NGui Jianfeng <guijianfeng@cn.fujitsu.com> Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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