Messages in this thread | | | Date | Wed, 13 Sep 2017 10:34:01 -0300 | From | Arnaldo Carvalho de Melo <> | Subject | Re: [PATCH] perf, tools: Improve error messages for missing PMUs |
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Em Mon, Sep 11, 2017 at 05:26:36PM -0700, Andi Kleen escreveu: > From: Andi Kleen <ak@linux.intel.com> > > When a PMU is missing print a better error message mentioning > the missing PMU. > > % mkdir empty > % mount --bind empty /sys/devices/msr > % perf stat -M Summary true > event syntax error: '{inst_retired.any,cycles}:W,{cpu_clk_unhalted.thread}:W,{inst_retired.any}:W,{cpu_clk_unhalted.ref_tsc,msr/tsc/}:W,{fp_comp_ops_exe.sse_scalar..' > \___ Cannot find PMU `msr'. Missing kernel support? > > It still cannot find the right column for aliases, but it's already a vast improvement.
CC /tmp/build/perf/util/parse-events.o util/parse-events.c: In function ‘__parse_events_add_pmu’: util/parse-events.c:1227:3: error: ignoring return value of ‘asprintf’, declared with attribute warn_unused_result [-Werror=unused-result] (void)asprintf(&err->str, ^~~~~~~~~~~~~~~~~~~~~~~~~ "Cannot find PMU `%s'. Missing kernel support?", ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ name); ~~~~~ cc1: all warnings being treated as errors mv: cannot stat '/tmp/build/perf/util/.parse-events.o.tmp': No such file or directory make[4]: *** [/home/acme/git/linux/tools/build/Makefile.build:95: /tmp/build/perf/util/parse-events.o] Error 1 make[3]: *** [/home/acme/git/linux/tools/build/Makefile.build:138: util] Error 2 make[2]: *** [Makefile.perf:595: /tmp/build/perf/libperf-in.o] Error 2 make[1]: *** [Makefile.perf:210: sub-make] Error 2 make: *** [Makefile:109: install-bin] Error 2 make: Leaving directory '/home/acme/git/linux/tools/perf'
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