Performance Issue in WS16

NTDEV
1

Hi,
I am developing a storport mini port driver for a SCSI HBA. The performance of driver is higher in Windows Server 2012 R2 DataCenter edition as compared to Windows Server 2016 14393 build. I am using the same machine, same tool (IO meter with same configuration) & same driver for various workloads from 512 to 4K to 1M RR/RW/SR/SW.

Do we have any know issues/limitations with storport driver in Windows Server 2016 ? What might be the reason. I debugged StorPortInitializePerfOpts and I am setting STOR_PERF_DPC_REDIRECTION, STOR_PERF_OPTIMIZE_FOR_COMPLETION_DURING_STARTIO & STOR_PERF_CONCURRENT_CHANNELS flags in PERF_CONFIGURATION_DATA

Thanks

2

Dude… that’s not giving us much to go on.

Want to explain in more detail, please, what perf issues you’re seeing? Throughput? CPU Utilization? Reads? Writes? Long? Short? Random? Sequential? This is a native SCSI HBA (not some sort of other type of storage)?

Peter
OSR
@OSRDrivers

3

Peter,

It is a native SCSI HBA. Getting more IOPs in WS2012 R2 for random/sequential read/writes from 512 bytes I/O to 4K I/O with different queue depth (using IO meter for performance measurement)

4

OK.

That’s still not enough info. How can we have a technical discussion without any technical information?

Peter
OSR
@OSRDrivers