dev-support/byteman/hcfs-read.btm

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# Measure time spent in HCFS read implementations

RULE hcfs-read-FileSystem.close
CLASS org.apache.hadoop.fs.FileSystem
METHOD close
IF TRUE
DO
  System.out.println("Closing file system instance: " + System.identityHashCode($0));
  System.out.println("   read.call: " + readCounter("read.call"));
  System.out.println("   read.allTime: " + readCounter("read.allTime"));
  System.out.println("   readFully.call: " + readCounter("readFully.call"));
  System.out.println("   readFully.allTime: " + readCounter("readFully.allTime"));  
ENDRULE


RULE FSDataInputStream.Read.Entry
CLASS org.apache.hadoop.fs.FSDataInputStream
METHOD read
AT ENTRY
IF TRUE
DO resetTimer("read" + Thread.currentThread().getId());
   incrementCounter("read.call")
ENDRULE

RULE FSDataInputStream.Read.Exit
CLASS org.apache.hadoop.fs.FSDataInputStream
METHOD read
AT EXIT
BIND elapsedTime = java.lang.Math.toIntExact(getElapsedTimeFromTimer("read" + Thread.currentThread().getId()))
IF TRUE
DO
   incrementCounter("read.allTime", elapsedTime)
ENDRULE

RULE FSDataInputStream.ReadFully.Entry
CLASS org.apache.hadoop.fs.FSDataInputStream
METHOD read
AT ENTRY
IF TRUE
DO resetTimer("readFully" + Thread.currentThread().getId());
   incrementCounter("readFully.call")
ENDRULE

RULE FSDataInputStream.ReadFully.Exit
CLASS org.apache.hadoop.fs.FSDataInputStream
METHOD read
AT EXIT
BIND elapsedTime = java.lang.Math.toIntExact(getElapsedTimeFromTimer("readFully" + Thread.currentThread().getId()))
IF TRUE
DO
   incrementCounter("readFully.allTime", elapsedTime)
ENDRULE