Messages in this thread | ![/](/images/icornerl.gif) | | Subject | Re: [PATCH v4 4/4] rcu: Add RCU stall diagnosis information | From | "Leizhen (ThunderTown)" <> | Date | Fri, 4 Nov 2022 11:12:02 +0800 |
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On 2022/11/4 10:12, Zhen Lei wrote: > diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h > index d4a97e40ea9c3e2..44d49819a31f050 100644 > --- a/kernel/rcu/tree.h > +++ b/kernel/rcu/tree.h > @@ -158,6 +158,22 @@ union rcu_noqs { > u16 s; /* Set of bits, aggregate OR here. */ > }; > > +/* > + * Record the snapshot of the core stats at 1/2 rcu stall timeout. The member > + * gp_seq is used to ensure that all members are updated only once during the > + * second half period. The snapshot is taken only if this gp_seq is not equal > + * to rdp->gp_seq. > + */ > +struct rcu_snap_record { > + unsigned long gp_seq; /* Track rdp->gp_seq counter */ > + u64 cputime_irq; /* Accumulated cputime of hard irqs */ > + u64 cputime_softirq;/* Accumulated cputime of soft irqs */ > + u64 cputime_system; /* Accumulated cputime of kernel tasks */ > + unsigned long nr_hardirqs; /* Accumulated number of hard irqs */ > + unsigned int nr_softirqs; /* Accumulated number of soft irqs */ > + unsigned long long nr_csw; /* Accumulated number of task switches */ > +}; > + > /* Per-CPU data for read-copy update. */ > struct rcu_data { > /* 1) quiescent-state and grace-period handling : */ > @@ -262,6 +278,7 @@ struct rcu_data { > short rcu_onl_gp_flags; /* ->gp_flags at last online. */ > unsigned long last_fqs_resched; /* Time of last rcu_resched(). */ > unsigned long last_sched_clock; /* Jiffies of last rcu_sched_clock_irq(). */ > + struct rcu_snap_record snap_record; /* Snapshot of core stats at 1/2 rcu stall timeout */ > > int cpu; > };
Sorry, I forgot to update linux-rcu.git. There is a conflict here.
---------------- int cpu; }; ------------should be-------- long lazy_len; /* Length of buffered lazy callbacks. */ int cpu; ----------------
-- Regards, Zhen Lei
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