[mythtv-users] mythTV, Kaffeine and Twinhan DVB-T
Nick Crabtree
nickcrabtree at gmail.com
Wed Mar 15 12:24:01 UTC 2006
I get
Using 768743 loops per ms, running every load for 30 seconds Benchmarking
kernel 2.6.15-suspend2-r6 at datestamp 200603030849
--- Benchmarking simulated cpu of Audio in the presence of simulated ---
Load Latency +/- SD (ms) Max Latency % Desired CPU % Deadlines Met
None 0.013 +/- 0.0135 0.019 100 100
Video 0.019 +/- 0.0279 0.476 100 100
X 0.035 +/- 0.126 2 100 100
Burn 0.012 +/- 0.0123 0.018 100 100
Write 0.085 +/- 1.25 30.5 100 100
Read 0.03 +/- 0.0319 0.097 100 100
Compile 0.14 +/- 1.11 17.3 100 100
Memload 0.051 +/- 0.262 4.2 100 100
--- Benchmarking simulated cpu of Video in the presence of simulated ---
Load Latency +/- SD (ms) Max Latency % Desired CPU % Deadlines Met
None 0.032 +/- 0.0331 0.045 100 100
X 0.035 +/- 0.15 2 100 100
Burn 0.012 +/- 0.0124 0.018 100 100
Write 0.036 +/- 0.398 16.7 100 99.9Read
0.025 +/- 0.0274 0.109 100 100
Compile 0.112 +/- 1.54 50 99.8 99.7Memload
0.055 +/- 0.77 30.7 100 99.9
Using 768743 loops per ms, running every load for 30 seconds Benchmarking
kernel 2.6.15-suspend2-r6 at datestamp 200603030957 --- Benchmarking
simulated cpu of Audio in the presence of simulated --- Load Latency +/-
SD (ms) Max Latency % Desired CPU % Deadlines Met
None 0.014 +/- 0.0142 0.018 100 100
Video 0.031 +/- 0.0317 0.042 100 100
X 0.041 +/- 0.136 2 100 100
Burn 0.012 +/- 0.0125 0.038 100 100
Write 0.062 +/- 0.713 17.5 100 100
Read 0.031 +/- 0.0327 0.091 100 100
Compile 0.048 +/- 0.413 8 100 100
Memload 0.041 +/- 0.141 3.07 100 100
--- Benchmarking simulated cpu of Video in the presence of simulated ---
Load Latency +/- SD (ms) Max Latency % Desired CPU % Deadlines Met
None 0.013 +/- 0.014 0.018 100 100
X 0.033 +/- 0.155 2 100 100
Burn 0.012 +/- 0.0126 0.039 100 100
Write 0.065 +/- 1.57 66.4 99.9 99.9
Read 0.023 +/- 0.0258 0.124 100 100
Compile 0.064 +/- 0.64 16.7 100 99.9
Memload 0.056 +/- 0.421 10.2 100 100
--- Benchmarking simulated cpu of X in the presence of simulated ---
Load Latency +/- SD (ms) Max Latency % Desired CPU % Deadlines Met
None 0 +/- 0.00132 0.015 100 100
Video 0 +/- 0.00331 0.035 100 100
Burn 0 +/- 0.00136 0.016 100 100
Write 0 +/- 0.00315 0.037 100 100
Read 0 +/- 0.00284 0.035 100 100
Compile 0 +/- 0.00212 0.029 100 100
Memload 0 +/- 0.00519 0.065 100 100
--- Benchmarking simulated cpu of Gaming in the presence of simulated ---
Load Latency +/- SD (ms) Max Latency % Desired CPU
None 0 +/- 0 0 100
Video 0 +/- 0 0 100
X 0 +/- 0 0 100
Burn 85.3 +/- 198 568 54 Write 0.054
+/- 1.3
31.1 99.9
Read 0 +/- 0 0 100 Compile 93.7 +/-
185 676 51.6
Memload 0 +/- 0 0 100
... note that the only time I get less than 99% in the right hand column is
in the Gaming section. Your 83% Video in the presence of X could well be
related to your MythTV problem.
Which I/O scheduler are you using (I'm using CFQ).
On 3/15/06, Nicklas Bergfeldt <nicklas.bergfeldt at his.se> wrote:
>
> Nick Crabtree wrote:
>
> > To see whether buffering is the issue, you could try activating laptop
> > mode, which groups disk write activity into "chunks" that are spaced
> > at larger intervals than they normally would be. Although this is
> > intended as a power saving idea to let a laptop's hard drive spin
> > down, it would in this case check whether the 30second interval jumps
> > are due to disk cache flushes. emerge laptop-mode-tools to install it,
> > and run /usr/sbin/laptop_mode start to start it.
>
>
> I tried that and it did not have any effect :-(
>
>
> > Of course, if you are running other stuff and don't have the free RAM
> > for more than 30 seconds of TV then you will still get disk activity
> > and laptop mode won't help. But on a quiet system (no web browser or
> > email client running, for example) then you should have plenty of
> > spare RAM for this.
>
>
> That should not be any problem since this computer is solely used for
> mythTV...
>
>
> > You might also want to try benchmarking using interbench
> > members.optusnet.com.au/ckolivas/
> > <http://members.optusnet.com.au/ckolivas/>*interbench*/
>
>
> Would this indicate that I need faster hardware, or is it enough for
> mythTV?
>
> Sky /usr/src/interbench/interbench-0.30 > make
> gcc -W -Wall -g -O2 -s -pipe -c -o interbench.o interbench.c
> interbench.c:1404:18: warning: unknown escape sequence '\]'
> gcc -W -Wall -g -O2 -s -pipe -c -o hackbench.o hackbench.c
> gcc -lrt -lm interbench.o hackbench.o -o interbench
> Sky /usr/src/interbench/interbench-0.30 > ./interbench
> loops_per_ms unknown; benchmarking...
> 514666 loops_per_ms saved to file interbench.loops_per_ms
> Creating file for read load...
>
> Using 514666 loops per ms, running every load for 30 seconds
> Benchmarking kernel 2.6.15-gentoo-r1 at datestamp 200603151111
>
> --- Benchmarking simulated cpu of Audio in the presence of simulated ---
> Load Latency +/- SD (ms) Max Latency % Desired CPU % Deadlines Met
> None 0.007 +/- 0.0153 0.218 100 100
> Video 0.153 +/- 0.264 0.517 100 100
> X 1.42 +/- 3.15 12 100 100
> Burn 0.005 +/- 0.00633 0.016 100 100
> Write 0.033 +/- 0.178 4.02 100 100
> Read 0.024 +/- 0.025 0.071 100 100
> Compile 0.053 +/- 0.364 8 100 100
> Memload 0.128 +/- 0.705 8.01 100 100
>
> --- Benchmarking simulated cpu of Video in the presence of simulated ---
> Load Latency +/- SD (ms) Max Latency % Desired CPU % Deadlines Met
> None 0.005 +/- 0.00574 0.023 100 100
> X 4.15 +/- 9.3 33.3 99.1 83.4
> Burn 0.006 +/- 0.0123 0.127 100 100
> Write 0.028 +/- 0.186 5.75 100 100
> Read 0.023 +/- 0.0281 0.22 100 100
> Compile 0.036 +/- 0.491 20.7 100 99.9
> Memload 0.091 +/- 0.87 24.7 100 99.8
>
> --- Benchmarking simulated cpu of X in the presence of simulated ---
> Load Latency +/- SD (ms) Max Latency % Desired CPU % Deadlines Met
> None 0 +/- 0.00283 0.032 100 100
> Video 0.003 +/- 0.0386 0.476 100 100
> Burn 0 +/- 0.000872 0.012 100 100
> Write 0.214 +/- 1.21 10 93.8 92
> Read 0.036 +/- 0.42 6 99.3 98.7
> Compile 0.202 +/- 1.04 8 96.2 93.3
> Memload 0.149 +/- 0.983 10 92.1 90.7
>
> --- Benchmarking simulated cpu of Gaming in the presence of simulated ---
> Load Latency +/- SD (ms) Max Latency % Desired CPU
> None 0.001 +/- 0.0216 0.354 100
> Video 0.008 +/- 0.157 2.94 100
> X 12.9 +/- 31.3 208 88.6
> Burn 195 +/- 269 367 33.9
> Write 33.7 +/- 99.2 818 74.8
> Read 6.27 +/- 6.71 10.3 94.1
> Compile 326 +/- 395 570 23.5
> Memload 15.7 +/- 33.7 191 86.4
>
>
> Sky /usr/src/interbench/interbench-0.30 >
>
>
> /Nicklas
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--
Nick Crabtree
nickcrabtree at gmail.com
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