[ofa-general] Coalescing interrupts in SRP

Roland Dreier rdreier at cisco.com
Wed Jun 10 09:14:03 PDT 2009


 > > one could do a hack with ib_modify_cq() a la IPoIB (assuming you're using ConnectX HCA). 

 > I wonder why you consider this a hack...  is programming interrupt
 > coalescing uncommon with HBAs? with networking I understand that the
 > common practice is to apply both HW mitigation and "SW mitigation"
 > (NAPI) so with SSD IOPS rates peaking to hundreds of thousands I
 > assume such an approach is valid for disks as well.

Just because it is ConnectX only, and SW mitigation is likely to have
even more benefit.



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