Minor improvements to the regression testing

Summary:
Several fixes:
1) Use mktemp to create the files and directories
2) Take the stat file as an argument so that the buildservers
   can specify a file in the WORKSPACE and not in /tmp
3) Use nproc to set make -j value.
4) Check for valid values before sending to ODS
5) Cleanup the grep/cut pipeline to just use awk

Test Plan: Verify tests run and complete

Reviewers: sheki, dhruba

Reviewed By: sheki

Differential Revision: https://reviews.facebook.net/D7995

regression_build_test.sh

@@ -1,31 +1,99 @@
-#!/bin/bash -e
-make clean
-make db_bench -j12
+#!/bin/bash
+
+set -e
+
+NUM=10000000
+
+if [ $# -eq 1 ];then
+  DATA_DIR=$1
+elif [ $# -eq 2 ];then
+  DATA_DIR=$1
+  STAT_FILE=$2
+fi
+
+# On the production build servers, set data and stat
+# files/directories not in /tmp or else the tempdir cleaning
+# scripts will make you very unhappy.
+DATA_DIR=${DATA_DIR:-$(mktemp --tmpdir -d leveldb_XXXX)}
+STAT_FILE=${STAT_FILE:-$(mktemp --tmpdir -u leveldb_test_stats_XXXX)}
+
+function cleanup {
+  rm -rf $DATA_DIR
+  rm -f $STAT_FILE.fillseq
+  rm -f $STAT_FILE.readrandom
+  rm -f $STAT_FILE.overwrite
+}
+
+trap cleanup EXIT
 
 function send_to_ods {
   key="$1"
   value="$2"
+
+  if [ -z "$value" ];then
+    echo >&2 "ERROR: Key $key doesn't have a value."
+    return
+  fi
   curl -s "https://www.intern.facebook.com/intern/agent/ods_set.php?entity=rocksdb_build&key=$key&value=$value"
 }
 
-NUM=10000000
+make clean
+make db_bench -j$(nproc)
 
-DATA_DIR="$1"
-if [ -z "$DATA_DIR" ]
-then
-  DATA_DIR="/tmp/test_ldb"
-fi
-STAT_FILE="/tmp/leveldb_test_stats"
+./db_bench \
+    --benchmarks=fillseq \
+    --db=$DATA_DIR \
+    --use_existing_db=0 \
+    --bloom_bits=10 \
+    --num=$NUM \
+    --writes=$NUM \
+    --cache_size=6442450944 \
+    --cache_numshardbits=6 \
+    --open_files=55000 \
+    --statistics=1 \
+    --histogram=1 \
+    --disable_data_sync=1 \
+    --disable_wal=1 \
+    --sync=0  > ${STAT_FILE}.fillseq
 
-./db_bench --benchmarks=fillseq --db="$DATA_DIR" --use_existing_db=0 --bloom_bits=10 --num=$NUM --writes=$NUM --cache_size=6442450944 --cache_numshardbits=6 --open_files=55000 --statistics=1 --histogram=1 --disable_data_sync=1 --disable_wal=1 --sync=0  > "$STAT_FILE.fillseq"
+./db_bench \
+    --benchmarks=overwrite \
+    --db=$DATA_DIR \
+    --use_existing_db=1 \
+    --bloom_bits=10 \
+    --num=$NUM \
+    --writes=$((NUM / 2)) \
+    --cache_size=6442450944 \
+    --cache_numshardbits=6  \
+    --open_files=55000 \
+    --statistics=1 \
+    --histogram=1 \
+    --disable_data_sync=1 \
+    --disable_wal=1 \
+    --sync=0 \
+    --threads=8 > ${STAT_FILE}.overwrite
 
-./db_bench --benchmarks=overwrite --db=$DATA_DIR --use_existing_db=1 --bloom_bits=10 --num=$NUM --writes=$((NUM / 2)) --cache_size=6442450944 --cache_numshardbits=6  --open_files=55000 --statistics=1 --histogram=1 --disable_data_sync=1 --disable_wal=1 --sync=0 --threads=8 > "$STAT_FILE.overwrite"
+./db_bench \
+    --benchmarks=readrandom \
+    --db=$DATA_DIR \
+    --use_existing_db=1 \
+    --bloom_bits=10 \
+    --num=$NUM \
+    --reads=$((NUM / 100)) \
+    --cache_size=6442450944 \
+    --cache_numshardbits=6 \
+    --open_files=55000 \
+    --statistics=1 \
+    --histogram=1 \
+    --disable_data_sync=1 \
+    --disable_wal=1 \
+    --sync=0 \
+    --threads=128 > ${STAT_FILE}.readrandom
 
-./db_bench --benchmarks=readrandom --db=$DATA_DIR --use_existing_db=1 --bloom_bits=10 --num=$NUM --reads=$((NUM / 100)) --cache_size=6442450944 --cache_numshardbits=6 --open_files=55000 --statistics=1 --histogram=1 --disable_data_sync=1 --disable_wal=1 --sync=0 --threads=128 > "$STAT_FILE.readrandom"
+OVERWRITE_OPS=$(awk '/overwrite/ {print $5}' $STAT_FILE.overwrite)
+FILLSEQ_OPS=$(awk '/fillseq/ {print $5}' $STAT_FILE.fillseq)
+READRANDOM_OPS=$(awk '/readrandom/ {print $5}' $STAT_FILE.readrandom)
 
-OVERWRITE_OPS=$(grep overwrite "$STAT_FILE.overwrite" |cut -d"/" -f2 |cut -d" " -f2)
-FILLSEQ_OPS=$(grep fillseq "$STAT_FILE.fillseq" |cut -d"/" -f2 |cut -d" " -f2)
-READRANDOM_OPS=$(grep readrandom "$STAT_FILE.readrandom" |cut -d"/" -f2 |cut -d" " -f2)
 send_to_ods rocksdb.build.overwrite.qps $OVERWRITE_OPS
 send_to_ods rocksdb.build.fillseq.qps $FILLSEQ_OPS
 send_to_ods rocksdb.build.readrandom.qps $READRANDOM_OPS