From: vinod.koul@intel.com (Vinod Koul)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] dmaengine: xgene-dma: Remove memcpy offload support due to performance drop
Date: Wed, 14 Oct 2015 20:21:00 +0530 [thread overview]
Message-ID: <20151014145100.GX27370@localhost> (raw)
In-Reply-To: <1444830907-8035-1-git-send-email-rsahu@apm.com>
On Wed, Oct 14, 2015 at 07:25:07PM +0530, Rameshwar Prasad Sahu wrote:
> The DMA engine supports memory copy, RAID5 XOR, RAID6 PQ, and other
> computations. But the bandwidth of the entire DMA engine is shared
> among all channels. This patch re-configures operations availability
> such that one can achieve maximum performance for XOR and PQ
> computation by removing the memory offload operations.
Applied, thanks
--
~Vinod
WARNING: multiple messages have this Message-ID (diff)
From: Vinod Koul <vinod.koul-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
To: Rameshwar Prasad Sahu <rsahu-qTEPVZfXA3Y@public.gmane.org>
Cc: dan.j.williams-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
dmaengine-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
arnd-r2nGTMty4D4@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
jcm-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
patches-qTEPVZfXA3Y@public.gmane.org
Subject: Re: [PATCH] dmaengine: xgene-dma: Remove memcpy offload support due to performance drop
Date: Wed, 14 Oct 2015 20:21:00 +0530 [thread overview]
Message-ID: <20151014145100.GX27370@localhost> (raw)
In-Reply-To: <1444830907-8035-1-git-send-email-rsahu-qTEPVZfXA3Y@public.gmane.org>
On Wed, Oct 14, 2015 at 07:25:07PM +0530, Rameshwar Prasad Sahu wrote:
> The DMA engine supports memory copy, RAID5 XOR, RAID6 PQ, and other
> computations. But the bandwidth of the entire DMA engine is shared
> among all channels. This patch re-configures operations availability
> such that one can achieve maximum performance for XOR and PQ
> computation by removing the memory offload operations.
Applied, thanks
--
~Vinod
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WARNING: multiple messages have this Message-ID (diff)
From: Vinod Koul <vinod.koul@intel.com>
To: Rameshwar Prasad Sahu <rsahu@apm.com>
Cc: dan.j.williams@intel.com, dmaengine@vger.kernel.org,
arnd@arndb.de, linux-kernel@vger.kernel.org,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
jcm@redhat.com, patches@apm.com
Subject: Re: [PATCH] dmaengine: xgene-dma: Remove memcpy offload support due to performance drop
Date: Wed, 14 Oct 2015 20:21:00 +0530 [thread overview]
Message-ID: <20151014145100.GX27370@localhost> (raw)
In-Reply-To: <1444830907-8035-1-git-send-email-rsahu@apm.com>
On Wed, Oct 14, 2015 at 07:25:07PM +0530, Rameshwar Prasad Sahu wrote:
> The DMA engine supports memory copy, RAID5 XOR, RAID6 PQ, and other
> computations. But the bandwidth of the entire DMA engine is shared
> among all channels. This patch re-configures operations availability
> such that one can achieve maximum performance for XOR and PQ
> computation by removing the memory offload operations.
Applied, thanks
--
~Vinod
next prev parent reply other threads:[~2015-10-14 14:51 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-14 13:55 [PATCH] dmaengine: xgene-dma: Remove memcpy offload support due to performance drop Rameshwar Prasad Sahu
2015-10-14 13:55 ` Rameshwar Prasad Sahu
2015-10-14 14:51 ` Vinod Koul [this message]
2015-10-14 14:51 ` Vinod Koul
2015-10-14 14:51 ` Vinod Koul
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