[SPARK-14072][CORE] Show JVM/OS version information when we run a ben…

…chmark program

## What changes were proposed in this pull request?

This PR allows us to identify what JVM is used when someone ran a benchmark program. In some cases, a JVM version may affect performance result. Thus, it would be good to show processor information and JVM version information.

```
model name	: Intel(R) Xeon(R) CPU E5-2697 v2  2.70GHz
JVM information : OpenJDK 64-Bit Server VM, 1.7.0_65-mockbuild_2014_07_14_06_19-b00
Int and String Scan:                Best/Avg Time(ms)    Rate(M/s)   Per Row(ns)   Relative
-------------------------------------------------------------------------------------------
SQL Parquet Vectorized                    981 /  994         10.7          93.5       1.0X
SQL Parquet MR                           2518 / 2542          4.2         240.1       0.4X
```

```
model name	: Intel(R) Xeon(R) CPU E5-2697 v2  2.70GHz
JVM information : IBM J9 VM, pxa6480sr2-20151023_01 (SR2)
String Dictionary:                  Best/Avg Time(ms)    Rate(M/s)   Per Row(ns)   Relative
-------------------------------------------------------------------------------------------
SQL Parquet Vectorized                    693 /  740         15.1          66.1       1.0X
SQL Parquet MR                           2501 / 2562          4.2         238.5       0.3X
```

## How was this patch tested?

Tested by using existing benchmark programs

(If this patch involves UI changes, please attach a screenshot; otherwise, remove this)

Author: Kazuaki Ishizaki <[email protected]>

Closes apache#11893 from kiszk/SPARK-14072.

core/src/main/scala/org/apache/spark/util/Benchmark.scala

@@ -64,6 +64,7 @@ private[spark] class Benchmark(
 
     val firstBest = results.head.bestMs
     // The results are going to be processor specific so it is useful to include that.
+    println(Benchmark.getJVMOSInfo())
     println(Benchmark.getProcessorName())
     printf("%-35s %16s %12s %13s %10s\n", name + ":", "Best/Avg Time(ms)", "Rate(M/s)",
       "Per Row(ns)", "Relative")
@@ -91,16 +92,31 @@ private[spark] object Benchmark {
    * This should return something like "Intel(R) Core(TM) i7-4870HQ CPU @ 2.50GHz"
    */
   def getProcessorName(): String = {
-    if (SystemUtils.IS_OS_MAC_OSX) {
+    val cpu = if (SystemUtils.IS_OS_MAC_OSX) {
       Utils.executeAndGetOutput(Seq("/usr/sbin/sysctl", "-n", "machdep.cpu.brand_string"))
     } else if (SystemUtils.IS_OS_LINUX) {
       Try {
         val grepPath = Utils.executeAndGetOutput(Seq("which", "grep"))
         Utils.executeAndGetOutput(Seq(grepPath, "-m", "1", "model name", "/proc/cpuinfo"))
+        .replaceFirst("model name[\\s*]:[\\s*]", "")
       }.getOrElse("Unknown processor")
     } else {
       System.getenv("PROCESSOR_IDENTIFIER")
     }
+    cpu
+  }
+
+  /**
+   * This should return a user helpful JVM & OS information.
+   * This should return something like
+   * "OpenJDK 64-Bit Server VM 1.8.0_65-b17 on Linux 4.1.13-100.fc21.x86_64"
+   */
+  def getJVMOSInfo(): String = {
+    val vmName = System.getProperty("java.vm.name")
+    val runtimeVersion = System.getProperty("java.runtime.version")
+    val osName = System.getProperty("os.name")
+    val osVersion = System.getProperty("os.version")
+    s"${vmName} ${runtimeVersion} on ${osName} ${osVersion}"
   }
 
   /**