perfSONAR User Q&A and Other Discussion

[Philip Papadopoulos <>]

Thanks, Andrew and Brian.

for my own installation, i've reenabled both (haldaemon so that I could log in at runlevel 5),

irqbalance, too.

-P

On Fri, Oct 24, 2014 at 8:35 AM, Andrew Lake <> wrote:

Hi Phil,

As for haldaemon, I think we will need to further explore turning that back on. From asking some of the other developers, it's likely a relic from the past where there was some testing done showing that haldaemon may introduce jitter into OWAMP tests. This was likely 5+ years ago as the testing done was when perfSONAR was still a KNOPPIX distribution. We've created an issue and I think some more testing needs to be done before we can suggest if enabling or disabling it is the best course of action. I imagine some other disabled services might fall into this category as well. 

Thanks,

Andy

On Oct 24, 2014, at 10:12 AM, Brian Tierney <> wrote:

Phil:

You are absolutely right. I had no idea we were turning off irqbalance.
There is no reason to turn that off. On the other hand, since bwctl only allows 1 test at a time, this should have no impact.

On Thu, Oct 23, 2014 at 5:11 PM, Philip Papadopoulos <> wrote:

Also,

turning off irqbalance is now likely passe'.  

For example, myricom 10G cards work just fine with irqbalance
irqbalancing turned. The latest version of Mellanox 40G drivers are also irqbalance aware and properly take affinity-hints. giving good performance.

My suggestion is certain services may be recommended to be turned off.

% service irqbalance status
irqbalance (pid  12919) is running...

% /opt/nuttcp/bin/nuttcp-7.2.1 -xc2/2 -l 256K -r 67.58.50.74
47104.0000 MB /  10.00 sec = 39500.3677 Mbps 98 %TX 90 %RX 0 retrans 0.16 msRTT
% uname -a
Linux fiona-r.calit2.optiputer.net 3.10.55 #1 SMP Thu Oct 2 15:59:05 PDT 2014 x86_64 x86_64 x86_64 GNU/Linux

% ethtool -i eth4
driver: mlx4_en
version: 2.3-1.0.0 (Oct  2 2014)
firmware-version: 2.32.5100
bus-info: 0000:84:00.0
supports-statistics: yes
supports-test: yes
supports-eeprom-access: no
supports-register-dump: no
supports-priv-flags: yes

On Thu, Oct 23, 2014 at 2:57 PM, Philip Papadopoulos <> wrote:

answering part of my own question ---  where this is called  ... in the postinstall scriplet of
perl-perfSONAR_PS-Toolkit-SystemEnvironment

On Thu, Oct 23, 2014 at 2:53 PM, Philip Papadopoulos <> wrote:

Question says it all. Makes is kind of hard to log in to from the console.

Script in question:

/opt/perfsonar_ps/toolkit/scripts/system_environment/disable_unwanted_services

Exactly when and where is this script being called?

Thanks,
P

--
Philip Papadopoulos, PhD
University of California, San Diego
858-822-3628 (Ofc)
619-331-2990 (Fax)

--
Philip Papadopoulos, PhD
University of California, San Diego
858-822-3628 (Ofc)
619-331-2990 (Fax)

--
Philip Papadopoulos, PhD
University of California, San Diego
858-822-3628 (Ofc)
619-331-2990 (Fax)

--
Brian Tierney, http://www.es.net/tierney
Energy Sciences Network (ESnet), Berkeley National Lab
http://fasterdata.es.net

--
Philip Papadopoulos, PhD
University of California, San Diego
858-822-3628 (Ofc)
619-331-2990 (Fax)