Job allocations to fractions of parallel processing units (PPUs)

An adapter for a system comprising a plurality of physical processing units (PPUs), the adapter comprising:

• a network interface to communicate over a network;
• and
• an adapter controller to:
• receive, over the network, a request from a first tenant to schedule a first job in the system, wherein a physical PPU of the plurality of physical PPUs comprises multiple PPU fractions, and wherein a first PPU fraction of the multiple PPU fractions comprises a first PPU compute resource and a first PPU memory resource that is separate and isolated from a second PPU compute resource and a second PPU memory resource of a second PPU fraction of the multiple PPU fractions;
• allocate the first job to a first collection of PPU fractions of the multiple PPU fractions based on:
• an operational cost reduction objective to reduce a cost associated with a usage of the plurality of physical PPUs, and
• a tenant isolation constraint to provide tenant isolation wherein a single tenant of a plurality of tenants including the first tenant is to use a PPU fraction of the physical PPU at a time;
• and
• trigger processing of the first job according to the allocation of the first job to the first collection of PPU fractions, wherein data isolation is provided between the first job allocated to the first collection of PPU fractions and a second job of a second tenant allocated to a second collection of PPU fractions of the multiple PPU fractions.

A method comprising:

• receiving, by a job scheduler executed on a controller, the method, a request from a first tenant to schedule a first job in a system including a plurality of physical processing units (PPUs), wherein a physical PPU of the plurality of physical PPUs comprises multiple PPU fractions, and wherein a first PPU fraction of the multiple PPU fractions comprises a first PPU compute resource and a first PPU memory resource that is separate and isolated from a second PPU compute resource and a second PPU memory resource of a second PPU fraction of the multiple PPU fractions;
• allocating, by the job scheduler, the first job to a first collection of PPU fractions of the multiple PPU fractions based on:
• an operational cost reduction objective to reduce a cost associated with a usage of the plurality of physical PPUs,
• a migration cost reduction objective to reduce a cost associated with migrating jobs between physical PPUs, and
• a tenant isolation constraint to provide tenant isolation wherein a single tenant of a plurality of tenants including the first tenant is to use a PPU fraction of a physical PPU at a time;
• and
• processing the first job according to the allocation of the first job to the first collection of PPU fractions, wherein data isolation is provided between the first job allocated to the first collection of PPU fractions and a second job of a second tenant allocated to a second collection of PPU fractions of the multiple PPU fractions.