1 of 23 peformance problems at 30 to 40 percent system load

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hi all,

My name is Joël Krähemann, I'm developing:

http://gsequencer.org

and I'm using:

Linux debian 4.0.5 #1 SMP PREEMPT Sat Jul 11 16:32:49 CEST 2015 x86_64 GNU/Linux

For now I encounter on my system performance problems at a load of 30
to 40 % system load, all 8 virtual cpu's have same average load.

* `chrt` to higher priority doesn't give wished throughput.
* `taskset` has ff as default.
* `cpufreq-set -g performance` brings a little improvement for first seconds

This is my CPU:

Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                8
On-line CPU(s) list:   0-7
Thread(s) per core:    2
Core(s) per socket:    4
Socket(s):             1
NUMA node(s):          1
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 58
Model name:            Intel(R) Core(TM) i7-3740QM CPU @ 2.70GHz
Stepping:              9
CPU MHz:               3275.648
CPU max MHz:           3700.0000
CPU min MHz:           1200.0000
BogoMIPS:              5387.58
Virtualization:        VT-x
L1d cache:             32K
L1i cache:             32K
L2 cache:              256K
L3 cache:              6144K
NUMA node0 CPU(s):     0-7


GSequencer uses many threads but doesn't stay in realtime. What am I
doing wrong? Or how to gain more Performance out of the system?

I could imagine on my code side that vary frequency segmentation would
bring better throughput. By modeifing AGS_THREAD_DEFAULT_JIFFIE,
AGS_THREAD_MAX_PRECISION and related.

But for now I search for documentation about linux kernel performance counters.

Best regards,
Joël Krähemann
--
To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [RT Stable]     [Kernel Newbies]     [IDE]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux ATA RAID]     [Samba]     [Video 4 Linux]     [Device Mapper]

  Powered by Linux