GitHub user kiszk opened a pull request:
https://github.com/apache/spark/pull/12411
[SPARK-14656][Core] Fix Benchmark.getPorcessorName() always return "Unknown
processor" on Linux
## What changes were proposed in this pull request?
This PR returns correct processor name in ```/proc/cpuinfo``` on Linux from
```Benchmark.getPorcessorName()```. Now, this return ```Unknown processor```.
Since ```Utils.executeAndGetOutput(Seq("which", "grep"))``` return
```/bin/grep\n```, it is failed to execute ```/bin/grep\n```. This PR strips
```\n``` at the end of the line.
Before applying this PR
````
Java HotSpot(TM) 64-Bit Server VM 1.8.0_66-b17 on Linux
2.6.32-504.el6.x86_64
Unknown processor
back-to-back filter: Best/Avg Time(ms) Rate(M/s) Per
Row(ns) Relative
-------------------------------------------------------------------------------------------
Dataset 472 / 503 21.2
47.2 1.0X
DataFrame 51 / 58 198.0
5.1 9.3X
RDD 189 / 211 52.8
18.9 2.5X
````
After applying this PR
```
Java HotSpot(TM) 64-Bit Server VM 1.8.0_66-b17 on Linux
2.6.32-504.el6.x86_64
Intel(R) Xeon(R) CPU E5-2667 v2 @ 3.30GHz
back-to-back filter: Best/Avg Time(ms) Rate(M/s) Per
Row(ns) Relative
-------------------------------------------------------------------------------------------
Dataset 490 / 502 20.4
49.0 1.0X
DataFrame 55 / 61 183.4
5.5 9.0X
RDD 210 / 237 47.7
21.0 2.3X
```
## How was this patch tested?
Run Benchmark programs on Linux by hand
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/kiszk/spark SPARK-14656
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/12411.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #12411
----
commit a3dbb2a00914ac26723521decae7af0599acd7d7
Author: Kazuaki Ishizaki <[email protected]>
Date: 2016-04-15T08:55:41Z
strip LF at the line end of a result of 'which' to corretly execute 'grep'
commit b6ea54e0185413fc3e09cb364564b5a4c27a6f68
Author: Kazuaki Ishizaki <[email protected]>
Date: 2016-04-15T09:10:45Z
strip LF at the line end of a result of 'grep'
----
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