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a=jiCTI4zE5U7BLdzWsZGv:22 a=EIcjfB9IiI4px24ztqRk:22 a=yMhMjlubAAAA:8 a=gIPyvA0aJkosq4B0VWsA:9 a=5yU3S35YU4bGjq-dph-N:22 a=Bho9c0fBagfJEIQBS7DQ:22 cc=ntf awl=host:12107 X-Proofpoint-GUID: TVnfuoFUJa8N0K1L0vO3ebenSrvoTqSe Sahil Chandna writes: > On Fri, Oct 16, 2026 at 12:08:21AM -0700, Ankur Arora wrote: >> Hi, >> >> Changes in this version address sashiko comments [17]. The major change >> is the change in the exit path in __smp_cond_load_relaxed_timeout() >> which allows us to simplify providing ACQUIRE semantics in >> smp_cond_load_acquire_timeout(): >> [ ... ] >> > Hi Ankur, > > I tested this patch series on an Azure Cobalt 100 > (neoverse-n2 on 64-vCPU Hyper-V guest (Standard_D64ps_v6), > on v7.2.12 + this series + arm64 cpuidle-haltpoll enablement[1] > > cpuidle-haltpoll loaded with force=1, guest_halt_poll_ns=200000. > > Baseline: no cpuidle driver(only WFI). > > Workload: PostgreSQL 16.15/pgbench scale 100, client and server in > the same VM over a unix socket, with single run: > > with (-S) TPC-B-like r/w > clients base TPS haltpoll lat avg base TPS haltpoll lat avg > 2 38658 +89% 52->27us 5299 +86% 378->203us > 4 72987 +99% 55->28 10305 +87% 388->208 > 16 300895 +91% 53->28 42035 +83% 381->208 > 32 590987 +93% 55->28 78319 +85% 410->221 > 64 987749 +0% 65->65 130675 +3% 490->474 > > Tested-by: Sahil Chandna Thanks Sahil. That's very helpful. Btw what's the (-S) option with in your first heading? Just to double check: was the VM created with any special option such as kvm-arm.wfe_trap_policy? -- ankur