High PREEMPTIVE_SP_SERVER_DIAGNOSTICS wait time in sql server 2014 server

I am seeing high waittimes for PREEMPTIVE_SP_SERVER_DIAGNOSTICS and the server is runninf with high cpu.
What could have triggered this high waittime, how can this be fixed,
WaitType Wait_S
Resource_S Signal_S
WaitCount Percentage
AvgWait_S AvgRes_S
AvgSig_S
PREEMPTIVE_SP_SERVER_DIAGNOSTICS 1655043.72
1655043.72 0.00
4 39.75
413760.9305 413760.9305
0.0000
PREEMPTIVE_OS_PIPEOPS 935157.21
935157.21 0.00
343445 22.46
2.7229 2.7229
0.0000
CXPACKET 259912.58
250608.73 9303.85
25115286 6.24
0.0103 0.0100
0.0004
PAGEIOLATCH_SH 206350.14
205563.18 786.96
37649420 4.96
0.0055 0.0055
0.0000
SOS_SCHEDULER_YIELD 139263.91
2430.27 136833.63
293382681 3.35
0.0005 0.0000
0.0005

Hello,
I remember I read a user complaining about high waits on PREEMPTIVE_SP_SERVER_DIAGNOSTICS when he installed CU5 for SQL
Server 2012 SP1, but in your scenario you have a SQL Server 2014 with CU1 (build 2342). I am treating this as a bug and that is the reason I would like you to consider applying CU5, the latest cumulative update, to see if that solves the issue.
http://support.microsoft.com/kb/3011055/en-us
This is the first time I read about this happening on SQL Server 2014 though.
I would like to suggest you to create a Connect item too, to see if the SQL Server team can suggest you another way to
treat this issue.
https://connect.microsoft.com/sqlServer/
Hope this helps.
Regards,
Alberto Morillo
SQLCoffee.com

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