From: Michael Neuling <mikey@neuling.org>
To: Paul Mackerras <paulus@samba.org>
Cc: michael@ellerman.id.au, linuxppc-dev@ozlabs.org,
kexec@lists.infradead.org, Anton Blanchard <anton@samba.org>
Subject: Re: [PATCH 2/2] powerpc,kexec: Speedup kexec hpte tear down
Date: Wed, 12 May 2010 11:06:58 +1000 [thread overview]
Message-ID: <9537.1273626418@neuling.org> (raw)
In-Reply-To: <20100512010003.GB3548@drongo>
> > We probably only do the remove on < 1% of the hptes now. So I doubt we
> > would get a speedup since most of the time we aren't do the remove
> > anymore.
>
> It would be nice to have some actual numbers. Could you add some
> counters and print the results at the end? (Or don't you have any
> way to print things at that stage?)
Printing is hard at that point but I think we can do it. I'll try to
when I get some time.
A heavily loaded system which kdumps will need a lot more hptes removes
than kexec, so stats for both these cases might be useful also.
Mikey
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WARNING: multiple messages have this Message-ID (diff)
From: Michael Neuling <mikey@neuling.org>
To: Paul Mackerras <paulus@samba.org>
Cc: linuxppc-dev@ozlabs.org, kexec@lists.infradead.org,
Anton Blanchard <anton@samba.org>
Subject: Re: [PATCH 2/2] powerpc,kexec: Speedup kexec hpte tear down
Date: Wed, 12 May 2010 11:06:58 +1000 [thread overview]
Message-ID: <9537.1273626418@neuling.org> (raw)
In-Reply-To: <20100512010003.GB3548@drongo>
> > We probably only do the remove on < 1% of the hptes now. So I doubt we
> > would get a speedup since most of the time we aren't do the remove
> > anymore.
>
> It would be nice to have some actual numbers. Could you add some
> counters and print the results at the end? (Or don't you have any
> way to print things at that stage?)
Printing is hard at that point but I think we can do it. I'll try to
when I get some time.
A heavily loaded system which kdumps will need a lot more hptes removes
than kexec, so stats for both these cases might be useful also.
Mikey
next prev parent reply other threads:[~2010-05-12 1:07 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-11 6:28 [PATCH 1/2] powerpc: Add hcall to read 4 ptes at a time in real mode Michael Neuling
2010-05-11 6:28 ` Michael Neuling
2010-05-11 6:28 ` [PATCH 2/2] powerpc,kexec: Speedup kexec hpte tear down Michael Neuling
2010-05-11 6:28 ` Michael Neuling
2010-05-11 7:04 ` Michael Ellerman
2010-05-11 7:04 ` Michael Ellerman
2010-05-11 23:29 ` Michael Neuling
2010-05-11 23:29 ` Michael Neuling
2010-05-12 0:36 ` Michael Ellerman
2010-05-12 0:36 ` Michael Ellerman
2010-05-12 0:43 ` Michael Neuling
2010-05-12 0:43 ` Michael Neuling
2010-05-12 1:00 ` Paul Mackerras
2010-05-12 1:00 ` Paul Mackerras
2010-05-12 1:06 ` Michael Neuling [this message]
2010-05-12 1:06 ` Michael Neuling
2010-05-12 1:36 ` Michael Ellerman
2010-05-12 1:36 ` Michael Ellerman
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