Date: Sat, 20 Jul 2019 17:51:35 -0700 From: bob prohaska <fbsd@www.zefox.net> To: Jamie Landeg-Jones <jamie@catflap.org>, freebsd-arm@freebsd.org Subject: Re: Lethargic rpi3, but seemingly still running Message-ID: <20190721005135.GA18642@www.zefox.net> In-Reply-To: <20190718182050.GL2342@funkthat.com> References: <20190718034838.GA1921@www.zefox.net> <201907180958.x6I9wBF8075274@donotpassgo.dyslexicfish.net> <20190718151858.GB4325@www.zefox.net> <20190718182050.GL2342@funkthat.com>
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On Thu, Jul 18, 2019 at 11:20:51AM -0700, John-Mark Gurney wrote:
> bob prohaska wrote this message on Thu, Jul 18, 2019 at 08:18 -0700:
> > On Thu, Jul 18, 2019 at 10:58:11AM +0100, Jamie Landeg-Jones wrote:
> > > bob prohaska <fbsd@www.zefox.net> wrote:
> > >
> > > > Every once in a while bsdtar will use a fraction of a percent of cpu, but
> > > > that seems to be all that's happening. The timestamp updates every other
> > > > second, typing echoes as expected but something like pwd takes twenty
> > > > seconds to answer. The controlling terminal for portmaster-devel has been
> > > > sitting at
> > >
> > > What's your I/O like?
> > >
> > > systat -v 1
> > >
> >
> > The machine got past the bottleneck and is running normally now, but
> > I'll try it the next time the machine bogs down. Does systat use a
> > different measurement method than top?
>
> top doesn't like block device io... iostat or systat -v 1 will do that.
>
Here's a snippet of systat -v 1 output while un-tarring firefox files.
%busy was close to zero, it looks like there's congestion or a deadlock
writing to the microSD card. At the time things like cd and ls were
very slow to respond (tens of seconds)
28 pdpgs cpu2:ast
Disks mmcsd da0 pass0 intrn cpu3:ast
KB/t 12.00 0.00 0.00 152904 wire 9 cpu0:preem
tps 5 0 0 80072 act 51 cpu1:preem
MB/s 0.06 0.00 0.00 671344 inact 80 cpu2:preem
%busy 213 0 0 120 21104 27 cpu3:preem
Thanks for reading,
bob prohaska
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