perf top: Drop samples which are behind the refresh rate
Drop samples from processing thread if they get behind the latest event read from the kernel maps. If it gets behind more than the refresh rate (-d option), drop the sample. Signed-off-by: NJiri Olsa <jolsa@kernel.org> Acked-by: NDavid S. Miller <davem@davemloft.net> Acked-by: NNamhyung Kim <namhyung@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lkml.kernel.org/n/tip-x533ra5c1pgofvbtsizzuydd@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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