msleeper wrote:
> Are you talking about TF2? I am pretty sure L4D's server is already
> multithreaded.
$ ps m -p 25096
PID TTY STAT TIME COMMAND
25096 pts/0 - 1:06 ./srcds_i486 +map l4d_hospital01_apartment
+hostport 27015 +clientport 27115 -fork +map l4d_hospital01_apartment
-game left4dead
- - Sl+ 0:52 -
- - Sl+ 0:00 -
- - Sl+ 0:09 -
Sure, there are 3 threads but only one is running the simulation (see
cpu time). Multithreaded but with no performance benefits over single
thread.
> # mpstat -P ALL
> Linux 2.6.25.10-grsec (sc-002) 04/23/09
>
> 20:09:48 CPU %user %nice %sys %iowait %irq %soft %steal
> %idle intr/s
> 20:09:48 all 25.09 0.00 2.39 0.18 0.03 0.75 0.00
> 71.56 1898.72
> 20:09:48 0 26.49 0.00 2.48 0.97 0.05 0.90 0.00
> 69.11 242.07
> 20:09:48 1 27.04 0.00 2.39 0.14 0.03 0.88 0.00
> 71.20 236.66
> 20:09:48 2 25.88 0.00 2.46 0.08 0.03 0.82 0.00
> 72.17 236.66
> 20:09:48 3 26.03 0.00 2.35 0.05 0.03 0.76 0.00
> 71.79 236.66
> 20:09:48 4 24.63 0.00 2.45 0.06 0.03 0.70 0.00
> 72.82 236.66
> 20:09:48 5 24.58 0.00 2.34 0.05 0.02 0.67 0.00
> 72.81 236.66
> 20:09:48 6 23.81 0.00 2.44 0.05 0.02 0.66 0.00
> 73.39 236.66
> 20:09:48 7 23.79 0.00 2.35 0.05 0.02 0.64 0.00
> 73.51 236.66
How is that supposed to show multithreading? A single thread can be
migrated many times a second between different cpus and many threads can
be executed serially on the same cpu. Thats also most likely not one but
many separate processes.
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