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perf cpumap: Fix die and cluster IDs
JIRA: https://issues.redhat.com/browse/RHEL-77936 upstream ======== commit 9fae588 Author: James Clark <james.clark@linaro.org> Date: Wed Dec 18 11:55:51 2024 +0000 description =========== Now that filename__read_int() returns -errno instead of -1 these statements need to be updated otherwise error values will be used as die IDs. This appears as a -2 die ID when the platform doesn't export one: $ perf stat --per-core -a -- true S36-D-2-C0 1 9.45 msec cpu-clock And the session topology test fails: $ perf test -vvv topology CPU 0, core 0, socket 36 CPU 1, core 1, socket 36 CPU 2, core 2, socket 36 CPU 3, core 3, socket 36 FAILED tests/topology.c:137 Cpu map - Die ID doesn't match ---- end(-1) ---- 38: Session topology : FAILED! Fixes: 05be17e ("tool api fs: Correctly encode errno for read/write open failures") Reported-by: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: James Clark <james.clark@linaro.org> Acked-by: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/r/20241218115552.912517-1-james.clark@linaro.org Signed-off-by: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Michael Petlan <mpetlan@redhat.com>
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tools/perf/util/cpumap.c

Lines changed: 2 additions & 2 deletions
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@@ -293,7 +293,7 @@ struct aggr_cpu_id aggr_cpu_id__die(struct perf_cpu cpu, void *data)
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die = cpu__get_die_id(cpu);
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/* There is no die_id on legacy system. */
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if (die == -1)
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if (die < 0)
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die = 0;
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/*
@@ -322,7 +322,7 @@ struct aggr_cpu_id aggr_cpu_id__cluster(struct perf_cpu cpu, void *data)
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struct aggr_cpu_id id;
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/* There is no cluster_id on legacy system. */
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if (cluster == -1)
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if (cluster < 0)
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cluster = 0;
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id = aggr_cpu_id__die(cpu, data);

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