It's true that load doesn't tell the whole story. Waiting for i/o will
drive the load numbers up. You should see higher %wa for the cpu when
there's a lot of waiting going on. It's possible to achieve high load
numbers (in the 10-30 second range) with i/o bound processes utilizing
very little cpu, for instance when syncing a raid-1 mirror.
--
-Eric 'shubes'
On 05/13/2012 09:42 AM, Nick Caldwell wrote:
Top didn't really show anything using the CPU all that much that I could
tell. Also my cpu fan didn't turn up to higher speeds, which normally
that load average for any more than a few minutes would at least kick it
up a notch or two. Right now it is sitting "idle" at 0.5 which I would
still consider higher than it should be, top showing mythfrontend and
mythbackend using 1% of the cpu and nothing else really anything. Isn't
the load average more than just cpu usage and can be impacted by io
waits and other factors? Maybe there isn't something sitting in the cpu
queue but instead waiting for some sort of io that is delayed, and would
also explain why the load is higher but my cpu is not hotter.
On Sun, May 13, 2012 at 7:49 AM, Eric Shubert
<e...@shubes.net
<mailto:e...@shubes.net>> wrote:
After the update, was it perhaps building locate or man page
indexes? Or maybe some other background activity?
On 05/10/2012 08:35 PM, Nick Caldwell wrote:
Actually it looks like the numbers are a bit lower than they
were when I
first installed, but still higher than I would think and idling
machine
should be at. I am running 3.2.0-24 kernel. When I first
installed this
version the load average was between .7 and .8, I have run Myth
back to
.22 I think? I don't remember them ever being that high just at
idle.
Today they are in the .3s. When I took this my box had only been
up 3.5
hours, it turns itself on right before I get home and shuts
itself off
late on work nights, so I generally don't have it up for more than 3
days at a time over a weekend.
From /proc/cpuinfo:
vendor_id : AuthenticAMD
cpu family : 15
model : 35
model name : AMD Athlon(tm) 64 X2 Dual Core Processor 4400+
stepping : 2
Inline image 1
On Thu, May 10, 2012 at 11:57 AM, Cliff Dunn
<alld...@gmail.com
<mailto:alld...@gmail.com>
<mailto:alld...@gmail.com
<mailto:alld...@gmail.com>>> wrote:
I don't know if my top screenshot came through on my last
email, but
I am attaching it again if not. It appears that Mythfrontend is
using the majority of the cpu. I haven't actually tried killing
that process yet to see if the load comes down to something
I would
expect. I would definitely be interested in your numbers.
And like
you I have dual HD ATSC tuners on my backend/frontend combo.
I have
noticed the load up to and above 2.00 since the upgrade on that
machine during recording/watching TV. The machine seems to
definitely be keeping up but I am obviously nearing my
threshold on
my dual core proc. Seems like such unnecessary high utilization
when I was seeing things so low before the upgrades.
On Thu, May 10, 2012 at 2:43 PM, Nick Caldwell
<kg6...@gmail.com
<mailto:kg6...@gmail.com>
<mailto:kg6...@gmail.com
<mailto:kg6...@gmail.com>>> wrote:
I did the upgrade about two weeks ago and noticed the same
thing. I did a clean install of Mythbuntu 12.04, my load
average
was pretty low, 0.10s or something (in previous
versions) when
it was doing nothing and now it sits around 0.8 to 1.0 when
doing nothing. I have dual hdtv inputs and it still
seems to be
able to keep up recording on both and playing back a
recording
while running mythcomflag, so I haven't really concerned
myself
with it. Also my cpu fan does not turn on to higher
speeds even
though typically it would, so I presumed the load number
is just
wrong, and not that the load is really that high. If I
look at
top or iotop they are sitting pretty idle as well.
I also have an AMD CPU, I forget which exact one but I
can send
my system info once I get home if it helps. I presume
this to be
an ubuntu problem though.
Nick
On Thu, May 10, 2012 at 10:23 AM, Cliff Dunn
<alld...@gmail.com
<mailto:alld...@gmail.com>
<mailto:alld...@gmail.com
<mailto:alld...@gmail.com>>> wrote:
I have noticed that after I updated from Mythbuntu
11.10 and
MythTV 0.24 to 12.04/0.25 that my load averages are much
higher. I am running AMD Athlon X2 260 processor.
Before the
upgrade, with Mythfrontend idle, I would see a load
average
of no more than 0.05. Now I am seeing the below
average when
idle with much higher loads when actually watching
something. I am curious if you guys have noticed
anything
similar?
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