[ovs-build] Errored: david-marchand/ovs#8 (rebalance_poc2 - 590c9f5)
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Thu Mar 28 19:37:52 UTC 2019
Build Update for david-marchand/ovs
-------------------------------------
Build: #8
Status: Errored
Duration: 43 mins and 59 secs
Commit: 590c9f5 (rebalance_poc2)
Author: David Marchand
Message: dpif-netdev: group pmd reloads
In a typical reconfiguration when swapping two queues from two pmd
threads, we first remove each queue from each pmd thread (step 5) and
wait for each pmd thread to report back.
After this, we add each queue to each pmd thread (step 6) and wait for
each pmd thread to report back.
x means non-polling work.
o means polling work.
| means waiting on another thread (kernel or busy loop)
ctrl pmd0 pmd1
x o o
seq_change() o o
pmd0->reload o o
cond_wait() o o
| !pmd0->reload o
x cond_signal() o
seq_change() seq_wait() o
pmd1->reload poll_block() o
cond_wait() | o
| | !pmd1->reload
x | cond_signal()
seq_change() | seq_wait
pmd0->reload x poll_block()
cond_wait() x |
| !pmd0->reload |
x cond_signal() |
seq_change() o x
pmd1->reload o x
cond_wait() o x
| o !pmd1->reload
x o cond_signal()
x o o
Let's wait for the last pmd thread to signal it finished using an atomic
count.
ctrl pmd0 pmd1
x o o
reloading_pmds+=2 o o
seq_change() o o
pmd0->reload o o
seq_change() !pmd0->reload o
pmd1->reload reloading_pmds-- o
cond_wait() seq_wait() !pmd1->reload
| poll_block() reloading_pmds--
| | cond_signal()
x | seq_wait
reloading_pmds+=2 | poll_block()
seq_change() x |
pmd0->reload x |
seq_change() !pmd0->reload |
pmd1->reload reloading_pmds-- x
cond_wait() o !pmd1->reload
| o reloading_pmds--
x o cond_signal()
x o o
Signed-off-by: David Marchand <david.marchand at redhat.com>
View the changeset: https://github.com/david-marchand/ovs/compare/ded32b427fca...590c9f53d970
View the full build log and details: https://travis-ci.com/david-marchand/ovs/builds/106167082?utm_medium=notification&utm_source=email
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