presto-benchmark-driver/src/main/java/io/prestosql/benchmark/driver/BenchmarkQueryRunner.java/BenchmarkQueryRunner/getTotalCpuTime
class BenchmarkQueryRunner:    private long getTotalCpuTime()
    {
        long totalCpuTime = 0;
        for (URI server : nodes) {
            URI addressUri = uriBuilderFrom(server).replacePath("/v1/jmx/mbean/java.lang:type=OperatingSystem/ProcessCpuTime").build();
            String data = httpClient.execute(prepareGet().setUri(addressUri).build(), createStringResponseHandler()).getBody();
            totalCpuTime += parseLong(data.trim());
        }
        return TimeUnit.NANOSECONDS.toNanos(totalCpuTime);
    }