Re: [patch] latency tracer, 2.6.15-rc7

On Fri, 2005-12-30 at 20:29 -0800, Paul E. McKenney wrote:
> This should help in UP configurations, or in SMP configurations where
> all CPUs are doing call_rcu_bh() very frequently.  I would not expect
> it to help in cases where one of several CPUs is frequently executing
> call_rcu_bh(), but where the other CPUs are either CPU-bound in user
> space or are in a tickful idle state. 

This and net/decnet/dn_route.c are the only two uses of call_rcu_bh in
the kernel.  And this one does not seem to be invoked frequently, it
took ~48 hours to show up in the latency tracer.  Of course a server
workload might call it all the time.

Lee

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

---

• Follow-Ups:
  • Re: [patch] latency tracer, 2.6.15-rc7
    • From: "Paul E. McKenney" <[email protected]>

• References:
  • Re: [patch] latency tracer, 2.6.15-rc7
    • From: Lee Revell <[email protected]>
  • Re: [patch] latency tracer, 2.6.15-rc7
    • From: Lee Revell <[email protected]>
  • Re: [patch] latency tracer, 2.6.15-rc7
    • From: Ingo Molnar <[email protected]>
  • Re: [patch] latency tracer, 2.6.15-rc7
    • From: Lee Revell <[email protected]>
  • Re: [patch] latency tracer, 2.6.15-rc7
    • From: Ingo Molnar <[email protected]>
  • Re: [patch] latency tracer, 2.6.15-rc7
    • From: Lee Revell <[email protected]>
  • Re: [patch] latency tracer, 2.6.15-rc7
    • From: Linus Torvalds <[email protected]>
  • Re: [patch] latency tracer, 2.6.15-rc7
    • From: Lee Revell <[email protected]>
  • Re: [patch] latency tracer, 2.6.15-rc7
    • From: Linus Torvalds <[email protected]>
  • Re: [patch] latency tracer, 2.6.15-rc7
    • From: Lee Revell <[email protected]>
  • Re: [patch] latency tracer, 2.6.15-rc7
    • From: "Paul E. McKenney" <[email protected]>

• Prev by Date: Re: [patch] latency tracer, 2.6.15-rc7
• Next by Date: Re: [PATCH] strict VM overcommit accounting for 2.4.32/2.4.33-pre1
• Previous by thread: Re: [patch] latency tracer, 2.6.15-rc7
• Next by thread: Re: [patch] latency tracer, 2.6.15-rc7
• Index(es):
  • Date
  • Thread

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]