perf_event__process_cgroup
pdiff.tool.cgroup = perf_event__process_cgroup;
report.tool.cgroup = perf_event__process_cgroup;
if (perf_event__process_cgroup(tool, event, sample, machine) < 0)
script.tool.cgroup = perf_event__process_cgroup;
c.tool.cgroup = perf_event__process_cgroup;
int perf_event__process_cgroup(const struct perf_tool *tool,