Added flag progress_reports in db_stress

tools/db_crashtest.py

@@ -85,6 +85,7 @@ def main(argv):
             --open_files=500000
             --verify_checksum=1
             --sync=0
+            --progress_reports=0
             --disable_wal=0
             --disable_data_sync=1
             --target_file_size_base=2097152

tools/db_crashtest2.py

@@ -99,6 +99,7 @@ def main(argv):
             --open_files=500000
             --verify_checksum=1
             --sync=0
+            --progress_reports=0
             --disable_wal=0
             --disable_data_sync=1
             --target_file_size_base=2097152

tools/db_stress.cc

@@ -97,7 +97,10 @@ DEFINE_bool(histogram, false, "Print histogram of operation timings");
 DEFINE_bool(destroy_db_initially, true,
             "Destroys the database dir before start if this is true");
 
-DEFINE_bool (verbose, false, "Verbose");
+DEFINE_bool(verbose, false, "Verbose");
+
+DEFINE_bool(progress_reports, true,
+            "If true, db_stress will report number of finished operations");
 
 DEFINE_int32(write_buffer_size, rocksdb::Options().write_buffer_size,
              "Number of bytes to buffer in memtable before compacting");
@@ -444,6 +447,7 @@ class Stats {
       last_op_finish_ = now;
     }
 
+    if (FLAGS_progress_reports) {
       done_++;
       if (done_ >= next_report_) {
         if      (next_report_ < 1000)   next_report_ += 100;
@@ -456,6 +460,7 @@ class Stats {
         fprintf(stdout, "... finished %ld ops%30s\r", done_, "");
       }
     }
+  }
 
   void AddBytesForWrites(int nwrites, size_t nbytes) {
     writes_ += nwrites;