CPU profiling of Tor on Android device

Using Android's simpleperf (or other tools) to collect CPU measurements in a reproducible manner on a set of Android devices.

It is important that we ensure that we can reproduce the results quickly and not require a test to run over multiple days/nights - this was a big problem with the sponsor 4 measurements where we used Chutney over a longer period of time.

changed milestone to %Tor: unspecified

added 034-removed-20180328 034-triage-20180328 component::core tor/tor milestone::Tor: unspecified parent::24061 priority::medium s8-201710 s8-perf severity::normal status::new type::task labels

I've made a sample report + callgraph from simpleperf from observing Tor starting up for the first time on the device. The sample results can be seen at: https://people.torproject.org/~ahf/sponsor8/sample-reports/

Trac:
Owner: N/A to ahf
Status: new to assigned

https://people.torproject.org/~ahf/sponsor8/ contains data from both bootstrap (clean data directory when starting Tor for the first time) and some samples from downloading a large file via Tor on an already bootstrapped client.

Patch coming up with some documentation on how to read and analyse the perf.data files.

Added some simpleperf instructions in https://gitlab.com/ahf/tor/merge_requests/21

Please don't close this ticket when this is pushed to tor.git.

Trac:
Status: assigned to needs_review

Trac:
Milestone: Tor: 0.3.4.x-final to Tor: 0.3.3.x-final

Creating review-group-26.

Trac:
Keywords: N/A deleted, review-group-26 added

Merged to master; returning this ticket to "assigned".

Trac:
Status: needs_review to assigned

Trac:
Keywords: review-group-26 deleted, N/A added

This is a tracker bug. Moving forward to 0.3.4.

Trac:
Milestone: Tor: 0.3.3.x-final to Tor: 0.3.4.x-final

Trac:
Keywords: N/A deleted, 034-triage-20180328 added

Per our triage process, these tickets are pending removal from 0.3.4.

Trac:
Keywords: N/A deleted, 034-removed-20180328 added

These tickets, tagged with 034-removed-*, are no longer in-scope for 0.3.4. We can reconsider any of them, if time permits.

Trac:
Milestone: Tor: 0.3.4.x-final to Tor: unspecified

Trac:
Sponsor: Sponsor8 to N/A

Trac:
Owner: ahf to N/A
Cc: N/A to ahf

Change tickets that are assigned to nobody to "new".

Trac:
Status: assigned to new

moved to tpo/core/tor#24062 (closed)