Bug 24764515 : Tagged command queuing disabled for SCSI-2 an

Bug 24764515 : Tagged command queuing disabled for SCSI-2 and SPC targets

Bug Attributes

Type	B - Defect	Fixed in Product Version	12.0
Severity	2 - Severe Loss of Service	Product Version	11.2-SRU
Status	80 - Development to QA/Fix Delivered Internal	Platform	23 - Oracle Solaris on SPARC (64-bit)
Created	30-Sep-2016	Platform Version	11.2
Updated	20-Mar-2017	Base Bug	N/A
Database Version	N/A	Affects Platforms	Generic
Product Source	Oracle	Knowledge, Patches and Bugs related to this bug


Related Products

Line	Sun Microsystems	Family	Operating Systems
Area	Solaris Operating System	Product	13009 - Oracle Solaris Cloud Service
Line	Sun Microsystems	Family	Operating Systems
Area	Solaris Operating System	Product	13056 - Oracle SPARC Compute Service
Line	Sun Microsystems	Family	Operating Systems
Area	Solaris Operating System	Product	7633 - Oracle Solaris Express
Line	Sun Microsystems	Family	Operating Systems
Area	Trusted Solaris	Product	8357 - Trusted Solaris Operating System
Line	Sun Microsystems	Family	Operating Systems
Area	Solaris Operating System	Product	8224 - Solaris Operating System
Line	Sun Microsystems	Family	Operating Systems
Area	Solaris Operating System	Product	8225 - Solaris x64/x86 Operating System
Line	Sun Microsystems	Family	Operating Systems
Area	Solaris Operating System	Product	8177 - OpenSolaris Operating System

Abstract: Tagged command queuing disabled for SCSI-2 and SPC targets

*** 09/30/16 08:55 am ***
Degraded performance for the mpt related disks in a Solaris 11.2 VMware guest
with a MPT HBA (emulated device). The sd drivers sends 1 I/O at a time to the
disk.

On Solaris 10 with the same guest VMware domain with MPT device, there is not
such issue.

The tag command queueing is disabled on S11.2 while it is active on 10. This
is visible at iostat and in the sd and mpt related data.

The same MPT device, same FW version is reported for both guest domains.

The differences in mpt configuration is visible with :

=>> S11 case
------------

mpt

   ushort_t m_props_update = 0
   ushort_t m_notag = 0xffff
   ushort_t m_nowide = 0xe080

sd

CAT(vmcore.0/11X)>  sdump 0xffffc100081310c0 sd_lun | egrep
'throttle|queue|arq'
  short un_throttle = 3 <============= this is the value visible in the
iostat
  short un_saved_throttle = 3
  short un_busy_throttle = 0
  short un_min_throttle = 8
  timeout_id_t un_reset_throttle_timeid = NULL
  unsigned :1 un_f_arq_enabled = 1
  unsigned :1 un_f_opt_queueing = 1 <=============== queueing only at the HBA
level
  unsigned :1 un_f_use_adaptive_throttle = 0
CAT(vmcore.0/11X)>

=>> S10 case
------------

mpt

   ushort_t m_props_update = 0
   ushort_t m_notag = 0xffc0
   ushort_t m_nowide = 0xffc0
sd

CAT(vmcore.0/10X)> sdump  0xffffffff853ed000 sd_lun | egrep
'throttle|queue|arq'
  short un_throttle = 0x100 <============ 256 commands supported
  short un_saved_throttle = 0x100
  short un_busy_throttle = 0
  short un_min_throttle = 8
  timeout_id_t un_reset_throttle_timeid = NULL
  unsigned int :1 un_f_arq_enabled = 1
  unsigned int :1 un_f_opt_queueing = 0 <============== no HBA cmd queueing
  unsigned int :1 un_f_use_adaptive_throttle = 0
CAT(vmcore.0/10X)>

All other data (sd inquiry, mpt fw version, mpt device) are identical.
*** 09/30/16 08:55 am ***
*** 09/30/16 08:59 am ***
*** 09/30/16 09:00 am *** (CHG: Sta->11)
*** 09/30/16 09:00 am ***
*** 10/03/16 01:40 am *** (CHG: Sta->16 Asg->JKRALOVE)
*** 10/03/16 01:46 am ***
*** 10/04/16 09:08 am ***
*** 10/04/16 09:11 am *** (CHG: Sta->17 Asg->SHENGZH2 SubComp->SD-FIXED)
*** 10/04/16 09:12 am ***
*** 10/04/16 09:14 am ***
*** 10/04/16 09:14 am ***
*** 10/05/16 12:29 am ***
*** 10/05/16 12:40 am ***
*** 10/05/16 01:33 am ***
*** 10/05/16 02:14 am ***
*** 10/05/16 08:41 am ***
*** 10/07/16 08:13 am ***
*** 10/07/16 08:29 am ***
*** 10/10/16 12:21 am ***
*** 10/13/16 07:41 am ***
*** 10/13/16 06:05 pm ***
*** 10/14/16 07:16 am ***
*** 10/14/16 12:55 pm ***
*** 10/17/16 01:09 am ***
*** 10/17/16 04:44 am ***
*** 10/18/16 06:14 am ***
*** 10/19/16 08:17 am ***
*** 10/25/16 08:02 am ***
*** 10/30/16 06:50 pm ***
*** 10/31/16 08:00 am ***
*** 11/01/16 05:48 am ***
*** 11/07/16 01:23 am ***
*** 11/11/16 08:57 am *** (CHG: Sta->25)
*** 11/14/16 01:17 am ***
*** 11/14/16 01:17 am *** (CHG: Sta->60)
*** 11/14/16 01:17 am ***
*** 11/14/16 07:30 am ***
*** 11/14/16 07:30 am ***
*** 11/14/16 08:44 am ***
*** 11/14/16 08:44 am ***
*** 11/14/16 08:44 am ***
*** 11/14/16 08:44 am ***
*** 11/14/16 08:44 am ***
*** 11/14/16 08:44 am ***
*** 11/14/16 08:03 pm ***
*** 11/20/16 11:59 pm ***
*** 11/20/16 11:59 pm ***
*** 11/28/16 02:55 pm *** (CHG: Sta->80)
*** 12/09/16 07:54 am ***
*** 12/09/16 07:54 am ***
*** 12/23/16 02:04 pm ***
*** 02/22/17 02:11 pm ***
---------- Solution Record ----------
Solution Type: SRU
Product: Solaris Operating System
Release: Solaris 11
Architecture: sparc, i386
Reference ID: 25485757
Solution Description: Fix delivered in Oracle Solaris 11.3.17.5.0 (or
greater)
-------- End Solution Record --------
*** 03/03/17 12:56 am ***
*** 03/20/17 09:50 am ***