petitboot percieved performance difference at V1.2.7 for OPAL 860.20

[Michael Landry]

Stewart,

For petitboot changes for Briggs and Stratton, a great deal was made of the
messages and pb-discover work done during the petitboot to assure the user
there was no performance slowdown.

The PetitBoot release notes do not call attention to this other than the
"server connect message" was made more clear.

   v1.3.2 and v1.2.7 both contain the following new fixes:

   - discover/platform-powerpc: Reject bootdevs with empty UUIDs
   	This fixes an NVRAM parsing issue that could lead to a segfault in
   the
   	ncurses UI. v1.2.7 also fixes this for old-style bootdev parameters.

   - ui/ncurses: Spin child to ensure autoboot cancelled on exit
   	Avoids the scenario where a user could exit the UI and have the
   	pb-discover server still autoboot from underneath them.

   - ui/ncurses: Make server connect message more clear.


But this was added to the OpenPower Briggs and Stratton readme :

   The V2.00 firmware for LC Server is now less verbose during boot - only
   error-level messages are printed during Petitboot bootloader
   initialization.  This means that there will be fewer messages printed as
   the system boots.

   Additionally, the Petitboot user interface is started earlier in the
   boot process. This means that you will be presented with the user
   interface sooner, but it may still take time, potentially up to 30
   seconds, for the user interface to be populated with boot options as
   storage and network hardware is being initialized.  During this time,
   Petitboot will show the status message "Info: Waiting for device
   discovery".  When Petitboot device discovery is completed, the following
   status message will be shown "Info: Connected to pb-discover!".

Will the OPAL  860.10 users moving up to 860.20 (V1.2.6 to V1.2.7 for
petitboot need the same guidance that was given to the Briggs and Stratton
users to let thme performance is actually similar.

Or is this new behavior only seen on BMC systems with the FSP doing the PB
discovery as part of its VPD collection process?  Therefore,  there is no
impact for the Power 860 systems?


Regards,

Mike Landry    mlandry at us.ibm.com
Dept BRAA, 040-3-C228, IBM, Rochester, MN
Power Systems Enablement (formerly Power Firmware Development) Publications
and Test
(507) 253-5157   IBM T/L  8- 553-5157
WWW - http://w3.rchland.ibm.com/~v2aicmll

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