Hi Krgopi:
I use iperf to test the Solaris system. I have designed a group of
experiment. The first one is that I bind interrupts (just one receiving
queue), srs_thread, soft_ring_thread, iperf on one cpu (core 7), and
configure ip_squeue_fanout = 0. When I send 20 connection to the server,
the utilization of core 7 is about 98%. If I keep the other
configurations unchanged and bind iperf to the other cpu online (core
4), the utilization of core 4 is about 46% and core 7 is about 52%.
Whether this means the squeue that bind 20 connections has been
moved to core 4?
If so, I give the second experiment. According to the above
understanding, if I set ip_squeue_fanout = 1 and keep the other
configuration unchanged (iperf on core 7), I should get the result that
the load of core 7 should be shared by other cores randomly. Because
fanout mechanism should promise that connections will be
distributed to the other cores with less load. However, the results
show me that the load of core 7 is still keep very heavy, and the other
cores's load are still 0%.
Could you give me some explanation or suggestion about the above
phenomenon, and whether the squeue (the connection bound in) will
migrate to the other core with the above application?
thanks
Hongbo
rajagopal kunhappan wrote:
Hi Hongbo,
ip_squeue_bind is not there anymore in Snv.
It is advisable not to use these /etc/system tunables without
understanding the internal workings of the IP stack. Why were you
setting it to 0 in the first place?
-krgopi
On 02/19/10 02:01 PM, Hongbo Zou wrote:
Hi Rajagopal:
whether the following tunable is invalid on current Solaris version
set ip:/ip_squeue_bind/ = 0
thanks
Hongbo
rajagopal kunhappan wrote:
Use dladm command to do that. You can specify the cpu ids to dladm
like the following:
dladm set-linkprop -p cpus=0,1,2,3,4,5,6,7 myri10ge
While the above command will bind the srs worker and poll threads to
the cpus of your choice, the interrupts won't be re-targeted. To
re-target interrupts, you would need to use pcitool command at this
time. An update to Crossbow is going to take place next month at
which time the interrupts too will be re-targeted via the dladm
command to the cpus that are specified. myri10ge should be ported
to the new crossbow bits for it to take advantage of interrupt
re-targeting.
-krgopi
On 02/18/10 12:50 PM, Hongbo Zou wrote:
Hi Rick:
Thank you for your reply. Actually, I want to bind mac_srs_worker,
mac_srs_poll, and myri10ge interrupts threads on specified core. Is
there any suggestion?
Hongbo
rick weisner wrote:
No, pbind is for userland.
Do you have access to source ?
There should be an API, I can research it is you want to do it
in source.
rick
On Wed, Feb 17, 2010 at 06:40:09PM -0600, Hongbo Zou wrote:
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Date: Wed, 17 Feb 2010 18:40:09 -0600
From: Hongbo Zou <[email protected]>
Subject: [networking-discuss] Could I use 'pbind' command to bind
system
thread on a specified CPU
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Hi everyone:
I want to use 'pbind' to bind some system thread (not
application thread) on a specified CPU. Can I do it? If then,
how to get the lwpid of the system thread in Solaris? thanks
Hongbo
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