chore(ci): add an empty run for scap file before perf'ing it.

[FedeDP]

What type of PR is this?

/kind cleanup

Any specific area of the project related to this PR?

/area CI

Does this PR require a change in the driver versions?

What this PR does / why we need it:

Add a step where the scap file gets loaded (read by sinsp-example) before perfing it, so that we get more stable results.
Also, removed /dev/shm tmpfs workaround introduced in #1975

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

[FedeDP]

/milestone 0.18.0

[github-actions]

Perf diff from master - unit tests

     2.87%     +0.86%  [.] sinsp_thread_manager::find_thread
     0.91%     +0.82%  [.] sinsp::fetch_next_event
     1.53%     -0.81%  [.] 0x00000000000e83a0
     1.73%     +0.72%  [.] std::_Hashtable<long, std::pair<long const, std::shared_ptr<sinsp_threadinfo> >, std::allocator<std::pair<long const, std::shared_ptr<sinsp_threadinfo> > >, std::__detail::_Select1st, std::equal_to<long>, std::hash<long>, std::__detail::_Mod_range_hashing, std::__detail::_Default_ranged_hash, std::__detail::_Prime_rehash_policy, std::__detail::_Hashtable_traits<false, false, true> >::_M_find_before_node
     2.35%     -0.63%  [.] scap_event_decode_params
     1.76%     -0.61%  [.] std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_construct<char const*>
     0.75%     +0.55%  [.] libsinsp::events::is_unknown_event
     4.54%     -0.54%  [.] sinsp_evt::load_params
     8.09%     +0.50%  [.] sinsp::next
     0.75%     -0.44%  [.] sinsp_split[abi:cxx11]

Perf diff from master - scap file

     5.01%     +6.16%  [.] std::_Hashtable<long, std::pair<long const, std::shared_ptr<sinsp_threadinfo> >, std::allocator<std::pair<long const, std::shared_ptr<sinsp_threadinfo> > >, std::__detail::_Select1st, std::equal_to<long>, std::hash<long>, std::__detail::_Mod_range_hashing, std::__detail::_Default_ranged_hash, std::__detail::_Prime_rehash_policy, std::__detail::_Hashtable_traits<false, false, true> >::_M_find_before_node
    25.08%     -5.56%  [.] sinsp_evt_formatter::tostring_withformat
    19.86%     +4.60%  [.] sinsp_filter_check::extract_nocache
     5.00%     +4.20%  [.] sinsp_filter_check::extract
    15.02%     -3.72%  [.] sinsp_filter_check_thread::extract_single
     5.01%     +2.14%  [.] sinsp::next
    10.01%     -1.81%  [.] sinsp_filter_check::get_transformed_field_info
    10.02%     +0.23%  [.] sinsp_filter_check::rawval_to_string
     4.98%     +0.06%  [.] std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::_M_realloc_insert<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >

Heap diff from master - unit tests

peak heap memory consumption: 0B
peak RSS (including heaptrack overhead): 0B
total memory leaked: 0B

Heap diff from master - scap file

peak heap memory consumption: 0B
peak RSS (including heaptrack overhead): 0B
total memory leaked: 0B

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 50.98%. Comparing base (64fe187) to head (e26d671).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1977   +/-   ##
=======================================
  Coverage   50.98%   50.98%           
=======================================
  Files         310      310           
  Lines       39612    39612           
  Branches    17333    17396   +63     
=======================================
  Hits        20197    20197           
+ Misses      14340    14330   -10     
- Partials     5075     5085   +10     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[Andreagit97]

/approve

[incertum]

/approve

[poiana]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Andreagit97, FedeDP, incertum

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [Andreagit97,FedeDP,incertum]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment