Hi Pratik, V4 seems fine. Thank you. On Mon, Apr 12, 2021 at 12:43 AM Pratik Rajesh Sampat <psampat@xxxxxxxxxxxxx> wrote: > > Changelog v3-->v4 > Based on review comments by Doug Smythies, > 1. Parsing the thread_siblings_list for CPU topology information to > correctly identify the cores the test should run on in > default(quick) mode. > 2. The source CPU to source CPU interaction in the IPI test will always > result in a lower latency and cause a bias in the average, hence > avoid adding the latency to be averaged for same cpu IPIs. The > latency will still be displayed in the detailed logs. > > RFC v3: https://lkml.org/lkml/2021/4/4/31 Example output for an Intel i5-10600K, HWP active, performance mode. System very idle: $ sudo ./cpuidle.sh -v -i Inserting /lib/modules/5.12.0-rc7-prs-v4/kernel/drivers/cpuidle/test-cpuidle_latency.ko module --IPI Latency Test--- Baseline Avg IPI latency(ns): 686 Observed Avg IPI latency(ns) - State 0: 468 Observed Avg IPI latency(ns) - State 1: 956 Observed Avg IPI latency(ns) - State 2: 17936 Observed Avg IPI latency(ns) - State 3: 17968 --Timeout Latency Test-- Baseline Avg timeout diff(ns): 445 Observed Avg timeout diff(ns) - State 0: 377 Observed Avg timeout diff(ns) - State 1: 630 Observed Avg timeout diff(ns) - State 2: 322812 Observed Avg timeout diff(ns) - State 3: 306067 Removing /lib/modules/5.12.0-rc7-prs-v4/kernel/drivers/cpuidle/test-cpuidle_latency.ko module Full Output logged at: cpuidle.log $ grep . /sys/devices/system/cpu/cpu7/cpuidle/state*/residency /sys/devices/system/cpu/cpu7/cpuidle/state0/residency:0 /sys/devices/system/cpu/cpu7/cpuidle/state1/residency:1 /sys/devices/system/cpu/cpu7/cpuidle/state2/residency:360 /sys/devices/system/cpu/cpu7/cpuidle/state3/residency:3102 $ grep . /sys/devices/system/cpu/cpu7/cpuidle/state*/latency /sys/devices/system/cpu/cpu7/cpuidle/state0/latency:0 /sys/devices/system/cpu/cpu7/cpuidle/state1/latency:1 /sys/devices/system/cpu/cpu7/cpuidle/state2/latency:120 /sys/devices/system/cpu/cpu7/cpuidle/state3/latency:1034 ... Doug
