Re: ARM imx.6 SATA speed regression

2017-02-08 Thread Dan MacDonald
Hi all I'm still running the same 4.9.8 Arch kernel I was a few days ago and I haven't done any updates but I decided to run hdparm again, a few times actually, and now I'm getting 120/125 MB/s again on my SABRE lite, as I was under 4.9.0. When I last ran hdparm I ran it a few times and all the r

Re: ARM imx.6 SATA speed regression

2017-02-08 Thread Dan MacDonald
Hi Gary I'll hopefully get to try some different kernels tonight or tomorrow night, otherwise it may have to wait until the weekend. As for bisecting and cross-compiling (which I won't have time to try again until this weekend), maybe not having cross-compilation working won't be such an obstacle

Re: ARM imx.6 SATA speed regression

2017-02-08 Thread Gary Bisson
Hi Dan, On Tue, Feb 07, 2017 at 05:02:40PM +, Dan MacDonald wrote: > Thankfully there is an archive of older Arch ARM packages which should > reduce the amount amount of bisection / compiling I may need to do and > they have packages for most stable kernels between 4.9.0 and 4.9.8 > > http://

Re: ARM imx.6 SATA speed regression

2017-02-07 Thread Dan MacDonald
am wrote: >>> [Sorry for the top-post] >>> >>> >>> Hi Dan, >>> >>> >>> Could you run 'git bisect' between kernel 4.9.0 and 4.9.8 to understand >>> where this performance regression come from? >>> >>

Re: ARM imx.6 SATA speed regression

2017-02-07 Thread Dan MacDonald
gt; Could you run 'git bisect' between kernel 4.9.0 and 4.9.8 to understand >> where this performance regression come from? >> >> >> From: Dan MacDonald >> Sent: Tuesday, February 7, 2017 12:31:10 PM >> To: linux-kernel@vger.kernel.org >> Cc: Gary Bisson; Fabio Estevam; shawn...@kernel.org; t...@kernel.org >> Subject: Re: ARM imx.6 SATA speed regression >> >> (Fake) Reply to CC in relevant people.

Re: ARM imx.6 SATA speed regression

2017-02-07 Thread Dan MacDonald
4.9.8 to understand > where this performance regression come from? > > > From: Dan MacDonald > Sent: Tuesday, February 7, 2017 12:31:10 PM > To: linux-kernel@vger.kernel.org > Cc: Gary Bisson; Fabio Estevam; shawn...@kernel.org; t...@kernel.org &

Re: ARM imx.6 SATA speed regression

2017-02-07 Thread Dan MacDonald
(Fake) Reply to CC in relevant people.

ARM imx.6 SATA speed regression

2017-02-07 Thread Dan MacDonald
Hi LKML I recently got a SABRE Lite, iMX.6q based SBC. I bought this board over the RPi3, for example, because I wanted SATA and open source graphics drivers via etnaviv / armada. Under Arch Linux ARM with Linux 4.9.0, hdparm said I was getting an average of ~120 MB/s buffered disk read speed. Af