Messages in this thread | | | Date | Mon, 28 Feb 2022 00:43:13 -0800 | From | Zev Weiss <> | Subject | Re: [PATCH v2 0/2] ic2: mux: pca9541: add delayed-release support |
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On Mon, Jan 31, 2022 at 04:18:08PM PST, Zev Weiss wrote: >Hello, > >This series adds support for a new pca9541 device-tree property >("release-delay-us"), which delays releasing ownership of the bus >after a transaction for a configurable duration, anticipating that >another transaction may follow shortly. By avoiding a >release/reacquisition between transactions, this can provide a >substantial performance improvement for back-to-back operations -- on >a Delta AHE-50DC (ASPEED AST1250) system running OpenBMC with dozens >of LM25066 PMICs on PCA9541-arbitrated busses, a setting of 10000 (10 >ms) reduces the median latency the psusensor daemon's hwmon sysfs file >reads from 2.28 ms to 0.99 ms (a 57% improvement). >
Ping...Guenter, any thoughts on this?
Thanks, Zev
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