Add waits in test-ubuntu-reclaim-cache

[dvkashapov]

After #3103 time sensitive test-ubuntu-reclaim-cache started to fail because now startup always includes 30ms of calibration of HW clock, that's why we get this output:

Run echo "test SAVE doesn't increase cache"
test SAVE doesn't increase cache
2460491776
Could not connect to Valkey at 127.0.0.1:8080: Connection refused

Added waits for server to start, locally run, it helps

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 74.84%. Comparing base (73838a0) to head (92aec98).
⚠️ Report is 1 commits behind head on unstable.

Additional details and impacted files

@@             Coverage Diff              @@
##           unstable    #3134      +/-   ##
============================================
+ Coverage     74.69%   74.84%   +0.15%     
============================================
  Files           129      129              
  Lines         71199    71199              
============================================
+ Hits          53185    53292     +107     
+ Misses        18014    17907     -107     

see 18 files with indirect coverage changes

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[dvkashapov]

Somehow those changes did not apply to CI run with run-extra-tests label

[zuiderkwast]

It seems it didn't pass even with the sleep.

In the beginning of the job, maybe we need a sleep too, before these two valkey-cli?

  echo "test SAVE doesn't increase cache"
  CACHE0=$(grep -w file /sys/fs/cgroup/memory.stat | awk '{print $2}')
  echo "$CACHE0"
  ./src/valkey-server --daemonize yes --logfile /dev/null --dir /tmp/master --port 8080 --repl-diskless-sync no --pidfile /tmp/master/valkey.pid --rdbcompression no --enable-debug-command yes
  ./src/valkey-cli -p 8080 debug populate 10000 k 102400
  ./src/valkey-server --daemonize yes --logfile /dev/null --dir /tmp/slave --port 8081 --repl-diskless-load disabled --rdbcompression no
  ./src/valkey-cli -p 8080 save > /dev/null

Still didn't pass

[dvkashapov]

I added sleep exactly between those sever and cli launches, IDK how they did not execute and did not get logged

[zuiderkwast]

I added sleep exactly between those sever and cli launches, IDK how they did not execute and did not get logged

I believe the workflow is using the unstable branch, but it checks out the code from the PR branch. That means that changes to the yaml file itself doesn't run until I merge it.