Re: Move PinBuffer and UnpinBuffer to atomics - Mailing list pgsql-hackers

From Alexander Korotkov
Subject Re: Move PinBuffer and UnpinBuffer to atomics
Date
Msg-id CAPpHfdtz_3zK4yDdetLkrTx_D7nD0cPYtAhfdWPD_eE2q=MYVg@mail.gmail.com
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In response to Re: Move PinBuffer and UnpinBuffer to atomics  (Andres Freund <andres@anarazel.de>)
List pgsql-hackers
On Wed, Mar 30, 2016 at 10:16 AM, Andres Freund <andres@anarazel.de> wrote:
On 2016-03-30 07:13:16 +0530, Dilip Kumar wrote:
> On Tue, Mar 29, 2016 at 10:43 PM, Andres Freund <andres@anarazel.de> wrote:
>
> > My gut feeling is that we should do both 1) and 2).
> >
> > Dilip, could you test performance of reducing ppc's spinlock to 1 byte?
> > Cross-compiling suggest that doing so "just works".  I.e. replace the
> > #if defined(__ppc__) typedef from an int to a char.
> >
>
> I set that, but after that it hangs, even Initdb hangs..

Yea, as Tom pointed out that's not going to work.  I'll try to write a
patch for approach 1).

Great!  Do you need any improvements for pinunpin-cas-7.patch from me?

------
Alexander Korotkov
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company 

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