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Changing Shelf Settings Using HPI

Overriding the cooling algorithm with an HPI application

ThefollowingstepsillustratehowyoucandothisusingHPI:

1. OpenanHPIsessionusingtheactiveShelfManagerIPaddressasDomainId(seeWriting

HPIapplicationsonpage 57forinformation).

2. Usingthefanresources,setallfancontrolstotheSAHPI_CTRL_MODE_MANUALmode,

keepingtheirspeedsunchanged.Thisplacestheminthesystemmanageroverridemode.

Thefanresourcescanbeidentifiedbytheassociatedentitytype,

SAPHI_ENT_COOLING_UNIT.

3. Subscribeforeventsonthesession(seetheeventssectionoftheSAFHPISpecification).

StartlisteningforeventsinblockingmodebyissuingthesaHpiEventGet()functioncall

withTimeOut=SAHPI_TIMEOUT_BLOCK(seethefunctiondescriptionintheSAFHPI

Specification).Thisenablesreceptionofeventsdynamically.

4. Whenatemperatureassertioneventofsignificantseverityisreceived,feeditintothe

externalcoolingmodule.Thecoolingmodulecanthenusethefanresource'sfancontrol

toraiseorlowerthefanspeeds.

FormoreinformationonHPIcoolingandfancontrol,seetheSAFMappingSpecification.

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RadiSys ATCA-4616 Specifiche Pagina 75