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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-07-15 10:08:43 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-07-15 10:08:43 -0300 |
| commit | 0d203166de37ad50ea826f97570b3a2beea87c9d (patch) | |
| tree | 8f21ed251ba09bcffb05f11bf8cf02ad9ef41c54 /tools | |
| parent | 8811e8ea14c1056b09c794c67836b8a84584ddef (diff) | |
| download | lwn-0d203166de37ad50ea826f97570b3a2beea87c9d.tar.gz lwn-0d203166de37ad50ea826f97570b3a2beea87c9d.zip | |
perf tools: Bail out at "--sort dcacheline" and cacheline_size not known
There are cases where further work would be needed to overcome the fact
that neither sysconf(_SC_LEVEL1_DCACHE_LINESIZE) nor
/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size are
available in some systems (Android, for instance), so bail out when such
a situation takes place.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-ho8d8g8mh0o2dri7ckcccafi@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/util/sort.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c index 5854b4660a49..947d21f38398 100644 --- a/tools/perf/util/sort.c +++ b/tools/perf/util/sort.c @@ -2381,6 +2381,9 @@ static int sort_dimension__add(struct perf_hpp_list *list, const char *tok, if (sort__mode != SORT_MODE__MEMORY) return -EINVAL; + if (sd->entry == &sort_mem_dcacheline && cacheline_size == 0) + return -EINVAL; + if (sd->entry == &sort_mem_daddr_sym) list->sym = 1; @@ -2424,7 +2427,10 @@ static int setup_sort_list(struct perf_hpp_list *list, char *str, if (*tok) { ret = sort_dimension__add(list, tok, evlist, level); if (ret == -EINVAL) { - error("Invalid --sort key: `%s'", tok); + if (!cacheline_size && !strncasecmp(tok, "dcacheline", strlen(tok))) + error("The \"dcacheline\" --sort key needs to know the cacheline size and it couldn't be determined on this system"); + else + error("Invalid --sort key: `%s'", tok); break; } else if (ret == -ESRCH) { error("Unknown --sort key: `%s'", tok); |