Re: [tor-bugs] #32048 [Core Tor/Tor]: Loading a high number of Onion V3 Descriptors trough Tor Control Port lead to sustained 100% CPU

[Tor Bug Tracker & Wiki]

#32048: Loading a high number of Onion V3 Descriptors trough Tor Control Port 
lead
to sustained 100% CPU
--+
 Reporter:  naif  |  Owner:  (none)
 Type:  defect| Status:  new
 Priority:  Medium|  Milestone:  Tor: 0.4.3.x-final
Component:  Core Tor/Tor  |Version:
 Severity:  Normal| Resolution:
 Keywords:|  Actual Points:
Parent ID:| Points:
 Reviewer:|Sponsor:
--+

Comment (by nickm):

 I'm not sure this is the right approach for you, but you could start with
 the "profiling Tor with perf" instructions in doc/HACKING/HelpfulTools.md
 ?

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Re: [tor-bugs] #32048 [Core Tor/Tor]: Loading a high number of Onion V3 Descriptors trough Tor Control Port lead to sustained 100% CPU

[Tor Bug Tracker & Wiki]

#32048: Loading a high number of Onion V3 Descriptors trough Tor Control Port 
lead
to sustained 100% CPU
--+
 Reporter:  naif  |  Owner:  (none)
 Type:  defect| Status:  new
 Priority:  Medium|  Milestone:  Tor: 0.4.3.x-final
Component:  Core Tor/Tor  |Version:
 Severity:  Normal| Resolution:
 Keywords:|  Actual Points:
Parent ID:| Points:
 Reviewer:|Sponsor:
--+

Comment (by naif):

 I'm not specifically skilled in using perf or oprofile, could you tell me
 which specific "perf" diagnostic would it be useful for such purpose?

 Or if you need us to build Tor from source code with some debug flags,
 just provide a guidance and we'll make the testing

 Cross-ref ticket on GlobaLeaks Github
 https://github.com/globaleaks/GlobaLeaks/issues/2709

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Re: [tor-bugs] #32048 [Core Tor/Tor]: Loading a high number of Onion V3 Descriptors trough Tor Control Port lead to sustained 100% CPU

[Tor Bug Tracker & Wiki]

#32048: Loading a high number of Onion V3 Descriptors trough Tor Control Port 
lead
to sustained 100% CPU
--+
 Reporter:  naif  |  Owner:  (none)
 Type:  defect| Status:  new
 Priority:  Medium|  Milestone:  Tor: 0.4.3.x-final
Component:  Core Tor/Tor  |Version:
 Severity:  Normal| Resolution:
 Keywords:|  Actual Points:
Parent ID:| Points:
 Reviewer:|Sponsor:
--+
Changes (by nickm):

 * component:  - Select a component => Core Tor/Tor


Comment:

 Do you think you could get an profile from 'perf' or 'oprofile'?  The set
 of library functions that ltrace is reporting suggests that might not be
 so hard to fix, but to do so, we'll need some way to figure out what place
 in Tor is spending so much of its time in string processing for this case.

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