Allow the number of threads for the thloop workload to be increased beyond the normal 2. Add error checking to the parsed time and thread count values. Signed-off-by: Ian Rogers <irogers@google.com> Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>