DOCS-15854 Add cpuNanos to Linux (#2681)

* DOCS-15854 Add cpuNanos to Linux

* version added + nanoseconds

* LW feedback

Author: ajhuh-mdb

source/reference/database-profiler.txt

@@ -653,6 +653,13 @@ operation.
       the :data:`~system.profile.responseLength` value is in a field
       named ``reslen``.
 
+.. data:: system.profile.cpuNanos
+
+   .. versionadded:: 6.3
+
+   The total CPU time spent by a query operation in nanoseconds. This field is 
+   only available on Linux systems.
+
 .. data:: system.profile.protocol
 
    The :doc:`/reference/mongodb-wire-protocol` request message format.

source/reference/log-messages.txt

@@ -1010,13 +1010,19 @@ Starting in MongoDB 5.0, :ref:`slow operation
 <database-profiling-specify-slowms-threshold>` log messages include a 
 ``remote`` field specifying client IP address.
 
+Starting in MongoDB 6.3, :ref:`slow operation
+<database-profiling-specify-slowms-threshold>` log messages and :ref:`database 
+profiler <profiler>` entries include a ``cpuNanos`` field that specifies the 
+total CPU time spent by a query operation in nanoseconds. The ``cpuNanos`` field 
+is only available on Linux systems.
+
 The following example output includes information about
 a slow :doc:`aggregation </aggregation>` operation:
 
 .. code-block:: javascript
    :copyable: false
 
-   {"t":{"$date":"2020-05-20T20:10:08.731+00:00"},"s":"I",  "c":"COMMAND",  "id":51803,   "ctx":"conn281","msg":"Slow query","attr":{"type":"command","ns":"stocks.trades","appName":"MongoDB Shell","command":{"aggregate":"trades","pipeline":[{"$project":{"ticker":1.0,"price":1.0,"priceGTE110":{"$gte":["$price",110.0]},"_id":0.0}},{"$sort":{"price":-1.0}}],"allowDiskUse":true,"cursor":{},"lsid":{"id":{"$uuid":"fa658f9e-9cd6-42d4-b1c8-c9160fabf2a2"}},"$clusterTime":{"clusterTime":{"$timestamp":{"t":1590005405,"i":1}},"signature":{"hash":{"$binary":{"base64":"AAAAAAAAAAAAAAAAAAAAAAAAAAA=","subType":"0"}},"keyId":0}},"$db":"test"},"planSummary":"COLLSCAN","cursorid":1912190691485054730,"keysExamined":0,"docsExamined":1000001,"hasSortStage":true,"usedDisk":true,"numYields":1002,"nreturned":101,"reslen":17738,"locks":{"ReplicationStateTransition":{"acquireCount":{"w":1119}},"Global":{"acquireCount":{"r":1119}},"Database":{"acquireCount":{"r":1119}},"Collection":{"acquireCount":{"r":1119}},"Mutex":{"acquireCount":{"r":117}}},"storage":{"data":{"bytesRead":232899899,"timeReadingMicros":186017},"timeWaitingMicros":{"cache":849}},"remote": "192.168.14.15:37666","protocol":"op_msg","durationMillis":22427}}
+   {"t":{"$date":"2020-05-20T20:10:08.731+00:00"},"s":"I",  "c":"COMMAND",  "id":51803,   "ctx":"conn281","msg":"Slow query","attr":{"type":"command","ns":"stocks.trades","appName":"MongoDB Shell","command":{"aggregate":"trades","pipeline":[{"$project":{"ticker":1.0,"price":1.0,"priceGTE110":{"$gte":["$price",110.0]},"_id":0.0}},{"$sort":{"price":-1.0}}],"allowDiskUse":true,"cursor":{},"lsid":{"id":{"$uuid":"fa658f9e-9cd6-42d4-b1c8-c9160fabf2a2"}},"$clusterTime":{"clusterTime":{"$timestamp":{"t":1590005405,"i":1}},"signature":{"hash":{"$binary":{"base64":"AAAAAAAAAAAAAAAAAAAAAAAAAAA=","subType":"0"}},"keyId":0}},"$db":"test"},"planSummary":"COLLSCAN","cursorid":1912190691485054730,"keysExamined":0,"docsExamined":1000001,"hasSortStage":true,"usedDisk":true,"numYields":1002,"nreturned":101,"reslen":17738,"locks":{"ReplicationStateTransition":{"acquireCount":{"w":1119}},"Global":{"acquireCount":{"r":1119}},"Database":{"acquireCount":{"r":1119}},"Collection":{"acquireCount":{"r":1119}},"Mutex":{"acquireCount":{"r":117}}},"storage":{"data":{"bytesRead":232899899,"timeReadingMicros":186017},"timeWaitingMicros":{"cache":849}},"cpuNanos":22426151000,"remote": "192.168.14.15:37666","protocol":"op_msg","durationMillis":22427}}
 
 See the :ref:`examples section <log-message-json-examples>` for a
 :ref:`pretty-printed <log-message-pretty-printing>` version of this log
@@ -1453,6 +1459,7 @@ This example shows a :ref:`slow operation message
            "cache": 849
          }
        },
+       "cpuNanos": 22426151000,
        "remote": "192.168.14.15:37666",
        "protocol": "op_msg",
        "durationMillis": 22427