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Date: Mon, 12 Mar 2012 20:46:30 +0000 From: Matthew Garrett <mjg59@...f.ucam.org> To: ShuoX Liu <shuox.liu@...el.com> Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Greg KH <gregkh@...uxfoundation.org>, Yanmin Zhang <yanmin_zhang@...ux.intel.com>, "H. Peter Anvin" <hpa@...or.com>, "Valentin, Eduardo" <eduardo.valentin@...com>, Henrique de Moraes Holschuh <hmh@....eng.br>, "Brown, Len" <len.brown@...el.com>, Thomas Gleixner <tglx@...utronix.de>, Andrew Morton <akpm@...ux-foundation.org>, Ingo Molnar <mingo@...e.hu>, "Kleen, Andi" <andi.kleen@...el.com>, "linux-pm@...ts.linux-foundation.org" <linux-pm@...ts.linux-foundation.org> Subject: Re: [PATCH 2/3] cpuidle: Add a debugfs entry to disable specific C state for debug purpose. On Mon, Mar 12, 2012 at 05:21:33PM +0800, ShuoX Liu wrote: > In addition, C state might have much impact on performance tuning, > as it takes > much time to enter/exit C states, which might delay interrupt > processing. With > the new debug option, developers could check if a deep C state could impact > performance and how much impact it could cause. Would anyone doing performance tuning not be using the cpu_dma_latency interface? -- Matthew Garrett | mjg59@...f.ucam.org -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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