Yueh-Hsuan Chiang 89597bb66b Allow GetThreadList() to report the start time of the current operation.
Summary: Allow GetThreadList() to report the start time of the current operation.

Test Plan:
./db_bench --benchmarks=fillrandom --num=100000 --threads=40 \
  --max_background_compactions=10 --max_background_flushes=3 \
  --thread_status_per_interval=1000 --key_size=16 --value_size=1000 \
  --num_column_families=10

Sample output:
          ThreadID ThreadType                    cfName    Operation        OP_StartTime         State
   140338840797248   High Pri column_family_name_000003        Flush 2015/03/09-17:49:59
   140338844991552   High Pri column_family_name_000004        Flush 2015/03/09-17:49:59
   140338849185856    Low Pri
   140338983403584    Low Pri
   140339008569408    Low Pri
   140338861768768    Low Pri
   140338924683328    Low Pri
   140338899517504    Low Pri
   140338853380160    Low Pri
   140338882740288    Low Pri
   140338865963072   High Pri column_family_name_000006        Flush 2015/03/09-17:49:59
   140338954043456    Low Pri
   140338857574464    Low Pri

Reviewers: igor, rven, sdong

Reviewed By: sdong

Subscribers: lgalanis, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D34689
2015-03-10 14:51:28 -07:00
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