With -x, perf stat is able to output a not-quite-CSV format
output Commas in the output are not put into "". To make it easy
to parse it is recommended to use a different character like -x
\;
The fields are in this order:
• optional usec time stamp in fractions of second (with -I xxx)
• optional CPU, core, or socket identifier
• optional number of logical CPUs aggregated
• counter value
• unit of the counter value or empty
• event name
• run time of counter
• percentage of measurement time the counter was running
• optional variance if multiple values are collected with -r
• optional metric value
• optional unit of metric
Additional metrics may be printed with all earlier fields being
empty.
