Webmin / Bugs / #4967 miniserv.pl high cpu usage

Joe Morris - 2017-06-03

If it helps, after restart of webmin it slowly rises to the top cpu% It takes about 1 minute to reach the average of 60%

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Joe Morris - 2017-06-03

kworker is also running at 25% at thsi same time. When I stop webmin kworker goes down to 0.3%

i am installing perf to see what it tells me.

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Joe Morris - 2017-06-03

Can't get any info form perf. I will wait for a response now.

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Jamie Cameron - 2017-06-04

Are you doing anything in webmin when this happens, or does it happen all the time?

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- Joe Morris - 2017-06-04
  
  All of the time.
  
  It is constant from boot. Even if I don't touch webmin.
  
  Joe
  
  On Jun 4, 2017, 2:18 PM -0500, Jamie Cameron jcameron@users.sf.net, wrote:
  
  Are you doing anything in webmin when this happens, or does it happen all the time?
  [bugs:#4967] miniserv.pl high cpu usage
  Status: open
  Group: 1.840
  Created: Sat Jun 03, 2017 11:49 AM UTC by Joe Morris
  Last Updated: Sat Jun 03, 2017 12:28 PM UTC
  Owner: nobody
  Just installed webmin 1.8.4.0
  Top constantly shows miniserv.pl at 60% or higher. When i use the web interface of webmin, cpu is always 100%.
  This is constant. Even after a reboot or shutdown/restart of webmin.
  I am on a raspberry pi zero W with current version of Jessie
  Thanks
  Joe
  Sent from sourceforge.net because you indicated interest in https://sourceforge.net/p/webadmin/bugs/4967/
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Jamie Cameron - 2017-06-04

If you run strace -p on the webmin miniserv.pl process, what does it show it is doing?

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- Joe Morris - 2017-06-05
  
  The lines below are in an infinite loop.
  
  192.168.1.207 is another linux machine that I have. The IP address of this
  one is 192.168.1.16
  
  When I saw the .207 ip address I went and checked that machine and it was
  doing the same max CPU.
  
  Also, I downgraded to 7.9 of webmin thinking that it might help.
  
  It did not. So you are seeing the trace from 1.79
  
  Thanks
  
  Joe
  
  gettimeofday({1496673886, 601482}, NULL) = 0
  
  select(8, [5 6], NULL, NULL, {10, 0}) = 1 (in [6], left {9, 999974})
  
  gettimeofday({1496673886, 608638}, NULL) = 0
  
  wait4(-1, 0xbeb1bad8, WNOHANG, NULL) = -1 ECHILD (No child processes)
  
  recvfrom(6, "0.0.0.0:10000:1:", 1024, 0, {sa_family=AF_INET,
  sin_port=htons(10000), sin_addr=inet_addr("192.168.1.207")}, [16]) = 16
  
  getsockname(6, {sa_family=AF_INET, sin_port=htons(10000),
  sin_addr=inet_addr("0.0.0.0")}, [16]) = 0
  
  getsockname(6, {sa_family=AF_INET, sin_port=htons(10000),
  sin_addr=inet_addr("0.0.0.0")}, [16]) = 0
  
  sendto(6, "0.0.0.0:10000:1:", 16, 0, {sa_family=AF_INET,
  sin_port=htons(10000), sin_addr=inet_addr("192.168.1.207")}, 16) = 16
  
  From: Jamie Cameron [mailto:jcameron@users.sf.net]
  Sent: Sunday, June 4, 2017 4:05 PM
  To: [webadmin:bugs] 4967@bugs.webadmin.p.re.sf.net
  Subject: [webadmin:bugs] #4967 miniserv.pl high cpu usage
  
  If you run strace -p on the webmin miniserv.pl process, what does it show it
  is doing?
  
  [bugs:#4967] https://sourceforge.net/p/webadmin/bugs/4967/ miniserv.pl
  high cpu usage
  
  Status: open
  Group: 1.840
  Created: Sat Jun 03, 2017 11:49 AM UTC by Joe Morris
  Last Updated: Sun Jun 04, 2017 07:18 PM UTC
  Owner: nobody
  
  Just installed webmin 1.8.4.0
  
  Top constantly shows miniserv.pl at 60% or higher. When i use the web
  interface of webmin, cpu is always 100%.
  
  This is constant. Even after a reboot or shutdown/restart of webmin.
  
  I am on a raspberry pi zero W with current version of Jessie
  
  Thanks
  
  Joe
  
  Sent from sourceforge.net because you indicated interest in
  https://sourceforge.net/p/webadmin/bugs/4967/
  
  To unsubscribe from further messages, please visit
  https://sourceforge.net/auth/subscriptions/
  
  Related
  
  Bugs: #4967
  
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- Joe Morris - 2017-06-05
  
  Another thing that I just noticed.
  
  The webmin system information page on both machines shows minimal cpu usage
  for both user and core.
  
  But on both machines, TOP shows 90+ usage for miniserv.pl
  
  Joe
  
  From: Jamie Cameron [mailto:jcameron@users.sf.net]
  Sent: Sunday, June 4, 2017 4:05 PM
  To: [webadmin:bugs] 4967@bugs.webadmin.p.re.sf.net
  Subject: [webadmin:bugs] #4967 miniserv.pl high cpu usage
  
  If you run strace -p on the webmin miniserv.pl process, what does it show it
  is doing?
  
  [bugs:#4967] https://sourceforge.net/p/webadmin/bugs/4967/ miniserv.pl
  high cpu usage
  
  Status: open
  Group: 1.840
  Created: Sat Jun 03, 2017 11:49 AM UTC by Joe Morris
  Last Updated: Sun Jun 04, 2017 07:18 PM UTC
  Owner: nobody
  
  Just installed webmin 1.8.4.0
  
  Top constantly shows miniserv.pl at 60% or higher. When i use the web
  interface of webmin, cpu is always 100%.
  
  This is constant. Even after a reboot or shutdown/restart of webmin.
  
  I am on a raspberry pi zero W with current version of Jessie
  
  Thanks
  
  Joe
  
  Sent from sourceforge.net because you indicated interest in
  https://sourceforge.net/p/webadmin/bugs/4967/
  
  To unsubscribe from further messages, please visit
  https://sourceforge.net/auth/subscriptions/
  
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Jamie Cameron - 2017-06-06

What load does the uptime command show?

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- Joe Morris - 2017-06-06
  
  Very strange.
  
  Uptime shows very low cpu usages on both machines. But TOP shows the 99% for
  miniserv.pl
  
  I can verify that the TOP is more accurate from a response time standpoint.
  Very delayed responses with miniserv.pl running.
  
  Joe
  
  From: Jamie Cameron [mailto:jcameron@users.sf.net]
  Sent: Monday, June 5, 2017 11:41 PM
  To: [webadmin:bugs] 4967@bugs.webadmin.p.re.sf.net
  Subject: [webadmin:bugs] #4967 miniserv.pl high cpu usage
  
  What load does the uptime command show?
  
  [bugs:#4967] https://sourceforge.net/p/webadmin/bugs/4967/ miniserv.pl
  high cpu usage
  
  Status: open
  Group: 1.840
  Created: Sat Jun 03, 2017 11:49 AM UTC by Joe Morris
  Last Updated: Sun Jun 04, 2017 09:05 PM UTC
  Owner: nobody
  
  Just installed webmin 1.8.4.0
  
  Top constantly shows miniserv.pl at 60% or higher. When i use the web
  interface of webmin, cpu is always 100%.
  
  This is constant. Even after a reboot or shutdown/restart of webmin.
  
  I am on a raspberry pi zero W with current version of Jessie
  
  Thanks
  
  Joe
  
  Sent from sourceforge.net because you indicated interest in
  https://sourceforge.net/p/webadmin/bugs/4967/
  
  To unsubscribe from further messages, please visit
  https://sourceforge.net/auth/subscriptions/
  
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Jamie Cameron - 2017-06-07

Try turning off background status collection in Webmin, at Webmin -> Webmin Configuration.

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- Joe Morris - 2017-06-07
  
  It did not help.
  
  On Jun 6, 2017, 7:22 PM -0500, Jamie Cameron jcameron@users.sf.net, wrote:
  
  Try turning off background status collection in Webmin, at Webmin -> Webmin Configuration.
  [bugs:#4967] miniserv.pl high cpu usage
  Status: open
  Group: 1.840
  Created: Sat Jun 03, 2017 11:49 AM UTC by Joe Morris
  Last Updated: Tue Jun 06, 2017 04:41 AM UTC
  Owner: nobody
  Just installed webmin 1.8.4.0
  Top constantly shows miniserv.pl at 60% or higher. When i use the web interface of webmin, cpu is always 100%.
  This is constant. Even after a reboot or shutdown/restart of webmin.
  I am on a raspberry pi zero W with current version of Jessie
  Thanks
  Joe
  Sent from sourceforge.net because you indicated interest in https://sourceforge.net/p/webadmin/bugs/4967/
  To unsubscribe from further messages, please visit https://sourceforge.net/auth/subscriptions/
  
  alternate
  
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Jamie Cameron - 2017-06-07

I'm out of ideas then, sorry - I don't have similar hardware to test this on.

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- Joe Morris - 2017-06-07
  
  LOL, sorry. I did not look close enough.
  
  Now it is Perl that has the high CPU.
  
  Joe
  
  From: Jamie Cameron [mailto:jcameron@users.sf.net]
  Sent: Tuesday, June 6, 2017 11:53 PM
  To: [webadmin:bugs] 4967@bugs.webadmin.p.re.sf.net
  Subject: [webadmin:bugs] #4967 miniserv.pl high cpu usage
  
  I'm out of ideas then, sorry - I don't have similar hardware to test this
  on.
  
  [bugs:#4967] miniserv.pl high cpu usage
  
  Status: open
  Group: 1.840
  Created: Sat Jun 03, 2017 11:49 AM UTC by Joe Morris
  Last Updated: Wed Jun 07, 2017 12:22 AM UTC
  Owner: nobody
  
  Just installed webmin 1.8.4.0
  
  Top constantly shows miniserv.pl at 60% or higher. When i use the web
  interface of webmin, cpu is always 100%.
  
  This is constant. Even after a reboot or shutdown/restart of webmin.
  
  I am on a raspberry pi zero W with current version of Jessie
  
  Thanks
  
  Joe
  
  Sent from sourceforge.net because you indicated interest in
  https://sourceforge.net/p/webadmin/bugs/4967/
  
  To unsubscribe from further messages, please visit
  https://sourceforge.net/auth/subscriptions/
  
  Related
  
  Bugs: #4967
  
  alternate
  
  If you would like to refer to this comment somewhere else in this project, copy and paste the following link:

miniserv.pl high cpu usage

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