-
由 Andi Kleen 提交于
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. v2: Check asprintf Signed-off-by: NAndi Kleen <ak@linux.intel.com> Acked-by: NJiri Olsa <jolsa@kernel.org> Link: http://lkml.kernel.org/r/20170913215006.32222-1-andi@firstfloor.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
333b5665