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test: add uv threadpool congestion regression test #23099

Merged
merged 1 commit into from
Dec 30, 2018
Merged

test: add uv threadpool congestion regression test #23099

merged 1 commit into from
Dec 30, 2018

Commits on Dec 30, 2018

  1. test: regression test for uv threadpool congestion 

    Validate that massive dns lookups do not block filesytem I/O
(or any fast I/O for that matter).
Prior to libuv/libuv#1845 few back-to-back dns
lookup were sufficient to engage libuv threadpool workers in a blocking
manner, throttling other work items that need the pool. this test acts
as a regression test for the same.

Start slow and fast I/Os together, and make sure fast I/O can complete
in at least in 1/100th of time for slow I/O.

Refs: libuv/libuv#1845
Refs: nodejs#8436

PR-URL: nodejs#23099
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
    @gireeshpunathil
    gireeshpunathil committed Dec 30, 2018
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