From: Lee Revell <rlrevell@joe-job.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Dave Jones <davej@redhat.com>, Hugh Dickins <hugh@veritas.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
Linus Torvalds <torvalds@osdl.org>
Subject: Re: [patch] latency tracer, 2.6.15-rc7
Date: Thu, 29 Dec 2005 21:16:19 -0500 [thread overview]
Message-ID: <1135908980.4568.10.camel@mindpipe> (raw)
In-Reply-To: <20051229202848.GC29546@elte.hu>
On Thu, 2005-12-29 at 21:28 +0100, Ingo Molnar wrote:
> * Lee Revell <rlrevell@joe-job.com> wrote:
>
> > > Still does not quite work for me on i386. I applied all the patches as
> > > I'm using 4K stacks.
>
> oops!
>
> > > LD .tmp_vmlinux1
> > > init/built-in.o: In function `start_kernel':
> > > : undefined reference to `preempt_max_latency'
> > > make: *** [.tmp_vmlinux1] Error 1
> > >
> >
> > This patch fixes the problem.
>
> thanks, applied - new version uploaded.
It seems that debug_smp_processor_id is being called a lot, even though
I have a UP config, which I didn't see with the -rt kernel:
$ grep debug_smp_processor_id /proc/latency_trace | head -20
evolutio-4568 0d.H1 3us : debug_smp_processor_id (do_IRQ)
evolutio-4568 0d.h. 25us : debug_smp_processor_id (netif_rx)
evolutio-4568 0d.h. 28us : debug_smp_processor_id (kmem_cache_alloc)
evolutio-4568 0d.h. 31us+: debug_smp_processor_id (__kmalloc)
evolutio-4568 0d.s. 46us : debug_smp_processor_id (__do_softirq)
evolutio-4568 0d.s. 47us : debug_smp_processor_id (__do_softirq)
evolutio-4568 0d.s1 54us+: debug_smp_processor_id (kmem_cache_alloc)
evolutio-4568 0d.s1 65us : debug_smp_processor_id (kmem_cache_free)
evolutio-4568 0d.s3 109us : debug_smp_processor_id (kmem_cache_alloc)
evolutio-4568 0d.s3 111us+: debug_smp_processor_id (__kmalloc)
evolutio-4568 0d.s3 140us : debug_smp_processor_id (kfree)
evolutio-4568 0d.s3 141us : debug_smp_processor_id (kmem_cache_free)
evolutio-4568 0d.s3 158us : debug_smp_processor_id (kfree)
evolutio-4568 0d.s3 160us : debug_smp_processor_id (kmem_cache_free)
evolutio-4568 0d.s3 192us : debug_smp_processor_id (kfree)
evolutio-4568 0d.s3 193us : debug_smp_processor_id (kmem_cache_free)
evolutio-4568 0d.s3 210us : debug_smp_processor_id (kfree)
evolutio-4568 0d.s3 211us : debug_smp_processor_id (kmem_cache_free)
evolutio-4568 0d.s3 216us : debug_smp_processor_id (kmem_cache_alloc)
evolutio-4568 0d.s3 217us+: debug_smp_processor_id (__kmalloc)
etc.
Was this optimized out on UP before?
Lee
next prev parent reply other threads:[~2005-12-30 2:16 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-27 23:31 2.6.15-rc5: latency regression vs 2.6.14 in exit_mmap->free_pgtables Lee Revell
2005-12-28 2:46 ` Lee Revell
2005-12-28 22:59 ` Hugh Dickins
2005-12-29 0:00 ` Lee Revell
2005-12-29 8:22 ` [patch] latency tracer, 2.6.15-rc7 Ingo Molnar
2005-12-29 10:02 ` Dave Jones
2005-12-29 10:17 ` Ingo Molnar
2005-12-29 20:11 ` Lee Revell
2005-12-29 20:26 ` Lee Revell
2005-12-29 20:28 ` Ingo Molnar
2005-12-29 22:18 ` Lee Revell
2005-12-30 0:08 ` Grant Coady
2005-12-30 0:18 ` Lee Revell
2005-12-30 0:42 ` Grant Coady
2005-12-30 8:09 ` Ingo Molnar
2005-12-30 16:51 ` Linus Torvalds
2006-01-02 20:14 ` Ingo Molnar
2006-01-19 1:49 ` Lee Revell
2006-01-19 6:17 ` Lee Revell
2005-12-31 0:20 ` Grant Coady
2005-12-30 2:16 ` Lee Revell [this message]
2005-12-30 8:00 ` Ingo Molnar
2005-12-30 18:51 ` Lee Revell
2005-12-31 0:51 ` Lee Revell
2005-12-31 0:59 ` Mark Knecht
2005-12-31 1:16 ` Lee Revell
2005-12-31 1:30 ` Lee Revell
2005-12-31 1:02 ` Linus Torvalds
2005-12-31 1:15 ` Lee Revell
2005-12-31 1:39 ` Linus Torvalds
2005-12-31 3:54 ` Lee Revell
2005-12-31 4:00 ` Lee Revell
2005-12-31 4:29 ` Paul E. McKenney
2005-12-31 4:54 ` Lee Revell
2005-12-31 20:14 ` Paul E. McKenney
2006-01-01 5:46 ` Lee Revell
2006-01-01 18:56 ` Linus Torvalds
2006-01-01 19:02 ` Lee Revell
2006-01-01 19:06 ` Lee Revell
2006-01-03 11:12 ` Dipankar Sarma
2006-01-03 13:28 ` David Lang
2006-01-03 14:11 ` Dipankar Sarma
2006-01-03 14:09 ` Dipankar Sarma
2006-01-03 15:55 ` Paul E. McKenney
2005-12-31 4:48 ` Linus Torvalds
2006-01-01 8:32 ` Lee Revell
2006-01-06 20:28 ` Lee Revell
2005-12-29 0:54 ` 2.6.15-rc5: latency regression vs 2.6.14 in exit_mmap->free_pgtables Lee Revell
2006-01-19 1:42 ` Lee Revell
2006-01-19 7:29 ` Hugh Dickins
2006-01-19 7:32 ` Lee Revell
2006-01-19 7:35 ` Lee Revell
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