From: "Jan Beulich" <JBeulich@novell.com>
To: Keir Fraser <keir.fraser@eu.citrix.com>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Subject: Re: [PATCH, v2] reduce 'd' debug key's global impact
Date: Thu, 06 May 2010 09:14:03 +0100 [thread overview]
Message-ID: <4BE2966B0200007800001837@vpn.id2.novell.com> (raw)
In-Reply-To: <C80835EA.13626%keir.fraser@eu.citrix.com>
>>> Keir Fraser <keir.fraser@eu.citrix.com> 06.05.10 10:01 >>>
>Although I suppose the event-check vector has a cleaner interface for
>calling it and should be implemented for all architectures. If you add
>whatever new flag you need to irq_cpustat_t then it would be cheap to check,
>being a definite cache hit. I suppose each cpu would
>check-and-check-and-clear it, and then set it for the next CPU when it is
>done. That doesn't sound too bad.
Hmm, isn't irq_cpustat_t being used mostly on the local CPU so far,
and hence introducing reasons for bouncing the cache line wouldn't
be nice?
Jan
next prev parent reply other threads:[~2010-05-06 8:14 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-05 15:34 [PATCH, v2] reduce 'd' debug key's global impact Jan Beulich
2010-05-06 6:46 ` Jan Beulich
2010-05-06 7:42 ` Keir Fraser
2010-05-06 8:01 ` Keir Fraser
2010-05-06 8:14 ` Jan Beulich [this message]
2010-05-06 9:05 ` Keir Fraser
2010-05-06 9:07 ` Jan Beulich
2010-05-06 9:15 ` Keir Fraser
2010-05-06 9:25 ` Jan Beulich
2010-05-06 9:37 ` Keir Fraser
2010-05-06 8:07 ` Jan Beulich
2010-05-06 9:09 ` Keir Fraser
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