From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Sat, 23 Oct 2010 12:08:26 +0100 (BST) From: edward.robbins@domain.hid MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_20101023120826000000_48653" In-Reply-To: <4CBDF92F.20403@domain.hid> References: <1281709057.650414331@domain.hid> <4C65583D.3030800@domain.hid> <1281960823.030215299@domain.hid> <4C692FC3.5040802@domain.hid> <1283531433.789315367@domain.hid> <1283590285.1709.2153.camel@domain.hid> <1287134519.029617765@domain.hid> <1287143691.028416668@domain.hid> <4CB85C64.9040307@domain.hid> <1287496324.10921156@domain.hid> <4CBDF92F.20403@domain.hid> Message-ID: <1287832106.517512323@domain.hid> Subject: Re: [Xenomai-help] Very high latencies under stress testing List-Id: Help regarding installation and common use of Xenomai List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Gilles Chanteperdrix Cc: xenomai@xenomai.org ------=_20101023120826000000_48653 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Thanks, this script sounds like exactly what I need. I downloaded the lates= t snapshot of mkrootfs from git, but I don't want to install that on my roo= tfs. I'd just download the script alone, but looking at it I see it would w= ant to run a script in /ltp as well, so I guess I need ltp too. Can you tel= l me an easier way to set up dohell that might save me sifting through the = whole of ltp and mkrootfs to figure it out?=0A=0AThanks again,=0A=0AEdward= =0A=0AOn Tuesday, 19 October, 2010 9:01pm, "Gilles Chanteperdrix" said:=0A=0A> edward.robbins@domain.hid= .uk wrote:=0A> > Having disabled MTRR (and leaving in Phillipes patch) I am= not=0A> > getting unreasonable latencies unless I enable graphics accelera= tion.=0A> > Can I be sure this has solved the issue?=0A> =0A> Yes, run a lo= ng stress test while running latency. The stress test=0A> should stress any= thing (drivers, kernel services) you plan to use in the=0A> final system.= =0A> =0A> The way we do this when validating Xenomai is by running the "doh= ell"=0A> scripts, which relies on LTP to stress many kernel services.=0A> h= ttp://git.xenomai.org/?p=3Dmkrootfs.git;a=3Dblob;f=3Dtests/dohell;h=3D327a9= f20755e23547f960e4c316141652f839bbf;hb=3Dmaster=0A> =0A> --=0A> = Gilles.=0A> =0A ------=_20101023120826000000_48653 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Thanks, this script sounds like exactly wha= t I need. I downloaded the latest snapshot of mkrootfs from git, but I don'= t want to install that on my rootfs. I'd just download the script alone, bu= t looking at it I see it would want to run a script in /ltp as well, so I g= uess I need ltp too. Can you tell me an easier way to set up dohell that mi= ght save me sifting through the whole of ltp and mkrootfs to figure it out?=

Thanks again,

Edward

On Tuesday, 19 October, 2010 9:0= 1pm, "Gilles Chanteperdrix" <gilles.chanteperdrix@xenomai.org> said:<= br>
> edward.robbins@domain.hid wrote:
> > Hav= ing disabled MTRR (and leaving in Phillipes patch) I am not
> > ge= tting unreasonable latencies unless I enable graphics acceleration.
>= > Can I be sure this has solved the issue?
>
> Yes, run a = long stress test while running latency. The stress test
> should stre= ss anything (drivers, kernel services) you plan to use in the
> final= system.
>
> The way we do this when validating Xenomai is by = running the "dohell"
> scripts, which relies on LTP to stress many ke= rnel services.
> http://git.xenomai.org/?p=3Dmkrootfs.git;a=3Dblob;f= =3Dtests/dohell;h=3D327a9f20755e23547f960e4c316141652f839bbf;hb=3Dmaster>
> --
> = Gilles.
>
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