I fully understand the nature of a timeshare system... they go way back before AS400's... I used them on DEC PDP11's.<br><br>Indeed you can't make sure that one instance isn't 'hogging' CPU unless there's an even distribution of time / cpu unit.<br>
<br>That being said, it has been implied that FS should work on a large AWS instance... I'm trying to get to the bottom of how many users and how large a system questions that we have. I just have basic timing problems at this point with very small conference bridges on a m1.large AWS instance. Granted, I don't know what the rest of the server is doing but these are pretty consistent problems.<br>
<br>Mike<br><br><div class="gmail_quote">On Wed, Nov 16, 2011 at 11:47 AM, Ken Rice <span dir="ltr"><<a href="mailto:krice@freeswitch.org">krice@freeswitch.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div>
<font face="Monaco, Courier New"><span style="font-size:11pt">Actually, consider this, you have 1 server running 10 different instances for 10 different people and as AWS you have to try and be level handed about how you hand out instances on a single node in your cloud cluster...<br>
<br>
How do you make sure that instance 1 isnt hogging all the CPU time that instances 9 – 10 need?<br>
<br>
This is the nature of a timeshare system... This goes back to AS400s SYS 34’s and 36’s... Don’t get me wrong I think AWS, and cloud computing in general can be great for certain things (store and forward), but do you really want to chance the interruptions in RealTime media streaming where any delay in processing causes missed or dropped packets...<div>
<div class="h5"><br>
<br>
<br>
On 11/16/11 9:43 AM, "Michael Picher" <<a href="http://mpicher@gmail.com" target="_blank">mpicher@gmail.com</a>> wrote:<br>
<br>
</div></div></span></font><div><div class="h5"><blockquote><font face="Monaco, Courier New"><span style="font-size:11pt">Hi guys,<br>
<br>
Trying to get to the bottom of some conference bridge issues I'm having with running the system in AWS.<br>
<br>
We're hearing a bunch of snap-crackle-pops in conference bridges and when I tcpdum on the server itself I see them in the RTP and see RTP timestamp problems.<br>
<br>
I've run the following:<br>
<br>
<br>
timer_test<br>
<a href="http://freeswitch@127.0.0.1" target="_blank">freeswitch@127.0.0.1</a>@internal> timer_test 120 10<br>
<br>
Avg: 120.004ms Total Time: 1200.315ms<br>
<br>
2011-11-16 10:25:56.121131 [CONSOLE] mod_commands.c:461 Timer Test: samplecount after init: 1<br>
<a href="http://freeswitch@127.0.0.1" target="_blank">freeswitch@127.0.0.1</a>@internal> 2011-11-16 10:25:56.219163 [CONSOLE] mod_commands.c:466 Timer Test: samplecount after first step: 2<br>
2011-11-16 10:25:56.339195 [CONSOLE] mod_commands.c:475 Timer Test: 1 sleep 120 120006<br>
2011-11-16 10:25:56.459259 [CONSOLE] mod_commands.c:475 Timer Test: 2 sleep 120 120040<br>
2011-11-16 10:25:56.579259 [CONSOLE] mod_commands.c:475 Timer Test: 3 sleep 120 119976<br>
2011-11-16 10:25:56.699291 [CONSOLE] mod_commands.c:475 Timer Test: 4 sleep 120 120007<br>
2011-11-16 10:25:56.819318 [CONSOLE] mod_commands.c:475 Timer Test: 5 sleep 120 120001<br>
2011-11-16 10:25:56.939375 [CONSOLE] mod_commands.c:475 Timer Test: 6 sleep 120 120031<br>
2011-11-16 10:25:57.059397 [CONSOLE] mod_commands.c:475 Timer Test: 7 sleep 120 119996<br>
2011-11-16 10:25:57.179422 [CONSOLE] mod_commands.c:475 Timer Test: 8 sleep 120 119994<br>
2011-11-16 10:25:57.299461 [CONSOLE] mod_commands.c:475 Timer Test: 9 sleep 120 120005<br>
2011-11-16 10:25:57.419478 [CONSOLE] mod_commands.c:475 Timer Test: 10 sleep 120 119991<br>
<br>
test_time<br>
<a href="http://freeswitch@127.0.0.1" target="_blank">freeswitch@127.0.0.1</a>@internal> time_test 600 10<br>
<br>
test 1 sleep 600 1592<br>
test 2 sleep 600 986<br>
test 3 sleep 600 1018<br>
test 4 sleep 600 980<br>
test 5 sleep 600 1005<br>
test 6 sleep 600 1000<br>
test 7 sleep 600 972<br>
test 8 sleep 600 990<br>
test 9 sleep 600 1006<br>
test 10 sleep 600 994<br>
avg 1054<br>
<br>
For kernel:<br>
[root@openuc bin]# uname -r<br>
<br>
2.6.21.7-2.fc8xen<br>
<br>
CONFIG_HZ:<br>
[root@openuc bin]# grep CONFIG_HZ /boot/config-*<br>
<br>
/boot/config-2.6.16.33-xenU-x86_64:CONFIG_HZ_100=y<br>
/boot/config-2.6.16.33-xenU-x86_64:# CONFIG_HZ_250 is not set<br>
/boot/config-2.6.16.33-xenU-x86_64:# CONFIG_HZ_1000 is not set<br>
/boot/config-2.6.16.33-xenU-x86_64:CONFIG_HZ=100<br>
/boot/config-2.6.18-164.15.1.el5.centos.plus:# CONFIG_HZ_100 is not set<br>
/boot/config-2.6.18-164.15.1.el5.centos.plus:# CONFIG_HZ_250 is not set<br>
/boot/config-2.6.18-164.15.1.el5.centos.plus:CONFIG_HZ_1000=y<br>
/boot/config-2.6.18-164.15.1.el5.centos.plus:CONFIG_HZ=1000<br>
/boot/config-2.6.21-2952.fc8xen:# CONFIG_HZ_100 is not set<br>
/boot/config-2.6.21-2952.fc8xen:# CONFIG_HZ_250 is not set<br>
/boot/config-2.6.21-2952.fc8xen:# CONFIG_HZ_300 is not set<br>
/boot/config-2.6.21-2952.fc8xen:CONFIG_HZ_1000=y<br>
/boot/config-2.6.21-2952.fc8xen:CONFIG_HZ=1000<br>
<br>
are the xenU kernel settings screwing me here?<br>
<br>
Thanks,<br>
Mike<br>
<br>
</span></font></blockquote>
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<br></blockquote></div><br><br clear="all"><br>-- <br>There are 10 kinds of people in this world, those who understand binary and those who don't.<br><br><a href="mailto:mpicher@gmail.com">mpicher@gmail.com</a><br>blog: <a href="http://www.sipxecs.info">http://www.sipxecs.info</a><br>
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