linux-kernel - Re: [PATCH 1/2] usb: xhci-mtk: add a bandwidth budget table

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Date:   Tue, 19 Sep 2023 07:57:26 +0000
From:   Chunfeng Yun (云春峰) 
        <Chunfeng.Yun@...iatek.com>
To:     "angelogioacchino.delregno@...labora.com" 
        <angelogioacchino.delregno@...labora.com>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "mathias.nyman@...el.com" <mathias.nyman@...el.com>
CC:     "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "matthias.bgg@...il.com" <matthias.bgg@...il.com>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>
Subject: Re: [PATCH 1/2] usb: xhci-mtk: add a bandwidth budget table

On Thu, 2023-09-14 at 12:14 +0200, AngeloGioacchino Del Regno wrote:
> Il 30/08/23 14:28, Chunfeng Yun ha scritto:
> > In order to estimate when fs/ls transactions appear on a downstream
> > bus,
> > the host must calculate a best case full-speed budget, use a table
> > to
> > track how many bytes occure in each microframe.
> > This patch is prepared for introducing an improved bandwidth
> > scheduling.
> > 
> 
> Hello Chunfeng,
> 
> it would be helpful if you add a cover letter with some test results
> for
> the BW improvements that you're seeing here.
Ok
> 
> Thanks,
> Angelo
> 
> > Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
> > ---
> >   drivers/usb/host/xhci-mtk-sch.c | 113 +++++++++++++++++++++++--
> > -------
> >   drivers/usb/host/xhci-mtk.h     |   4 +-
> >   2 files changed, 85 insertions(+), 32 deletions(-)
> > 
> 
>