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The cursor nodes which generates from sample are eventually added into callchain. To avoid generating cursor nodes from previous samples again, the previous cursor nodes are also saved for LBR stitching approach. Some option, e.g. hide-unresolved, may hide some LBRs. Add a variable 'valid' in struct callchain_cursor_node to indicate this case. The LBR stitching approach will only append the valid cursor nodes from previous samples later. Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Reviewed-by: Andi Kleen <ak@linux.intel.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Pavel Gerasimov <pavel.gerasimov@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Cc: Stephane Eranian <eranian@google.com> Cc: Vitaly Slobodskoy <vitaly.slobodskoy@intel.com> Link: http://lore.kernel.org/lkml/20200319202517.23423-12-kan.liang@linux.intel.com [ Use zfree() instead of open coded equivalent, and use it when freeing members of structs ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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