237782 2022-03-11 09:18:42 -0800 Delay responsiveness checks for the Network Process until it has finished initialization 2022-03-11 12:23:15 -0800 1 1 1 Unclassified WebKit WebKit2 WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 cdumez cdumez achristensen ews-watchlist ggaren kkinnunen pascoe sihui_liu webkit-bug-importer oldest_to_newest 1850527 0 cdumez 2022-03-11 09:18:42 -0800 Delay responsiveness checks for the Network Process until it has finished initialization. Network process initialization can be slow but we have evidence that it is true truly hung since we see network process terminations right as the network process is initiating the WebProcess connection later on. 1850529 1 cdumez 2022-03-11 09:18:53 -0800 <rdar://88226412> 1850530 2 454489 cdumez 2022-03-11 09:22:45 -0800 Created attachment 454489 Patch 1850555 3 454489 ggaren 2022-03-11 10:18:02 -0800 Comment on attachment 454489 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=454489&action=review r=me > Source/WebKit/ChangeLog:10 > + Network process initialization can be slow but we have evidence that it is true truly true truly -> not truly? > Source/WebKit/UIProcess/AuxiliaryProcessProxy.cpp:371 > + m_delayedResponsivenessCheck = useLazyStop; When m_didBeginResponsivenessChecks is true, the *first* useLazyStop value wins, and all subsequent values are ignored so long as the timer is still active. When m_didBeginResponsivenessChecks is false, the *last* useLazyStop value wins, and all previous values are overwritten. Is this something we should care about? -- Maybe we don't care because useLazyStop is just a performance optimization for the case where we do schedule the timer? 1850556 4 454489 cdumez 2022-03-11 10:21:05 -0800 Comment on attachment 454489 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=454489&action=review >> Source/WebKit/ChangeLog:10 >> + Network process initialization can be slow but we have evidence that it is true truly > > true truly -> not truly? Oops :) >> Source/WebKit/UIProcess/AuxiliaryProcessProxy.cpp:371 >> + m_delayedResponsivenessCheck = useLazyStop; > > When m_didBeginResponsivenessChecks is true, the *first* useLazyStop value wins, and all subsequent values are ignored so long as the timer is still active. > > When m_didBeginResponsivenessChecks is false, the *last* useLazyStop value wins, and all previous values are overwritten. > > Is this something we should care about? -- Maybe we don't care because useLazyStop is just a performance optimization for the case where we do schedule the timer? Right, it is an optimization for repeated start calls so I don't think it is critical here. That said, I think you're right it's good to be consistent so I'll fix. 1850560 5 454495 cdumez 2022-03-11 10:26:32 -0800 Created attachment 454495 Patch 1850564 6 sihui_liu 2022-03-11 10:41:34 -0800 Do we know the cause of the slowness during initialization (I guess not all crashes point to random call stack )? If we do, could you add comment about the cause to the radar or FIXME in the code so that maybe we can make optimization in the future? 1850571 7 cdumez 2022-03-11 10:58:40 -0800 (In reply to Sihui Liu from comment #6) > Do we know the cause of the slowness during initialization (I guess not all > crashes point to random call stack )? If we do, could you add comment about > the cause to the radar or FIXME in the code so that maybe we can make > optimization in the future? The comments are already in the radar and as far as I can tell, it is already the same stack we're aware of. 1850592 8 ews-feeder 2022-03-11 12:23:12 -0800 Committed r291182 (248341@main): <https://commits.webkit.org/248341@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 454495. 454489 2022-03-11 09:22:45 -0800 2022-03-11 10:26:29 -0800 Patch bug-237782-20220311092244.patch text/plain 10284 cdumez U3VidmVyc2lvbiBSZXZpc2lvbjogMjkxMTIzCmRpZmYgLS1naXQgYS9Tb3VyY2UvV2ViS2l0L0No YW5nZUxvZyBiL1NvdXJjZS9XZWJLaXQvQ2hhbmdlTG9nCmluZGV4IDZhZDcyYTI5MWZiZGZlOGMz NzgxNmQzYTk1OGI5M2JjYjk4N2Q2NjcuLjg0YTVhNGZmN2YzOGJmNzIyMjY3MWJmMzE3ODI2ODFl MTM1MWZkOWMgMTAwNjQ0Ci0tLSBhL1NvdXJjZS9XZWJLaXQvQ2hhbmdlTG9nCisrKyBiL1NvdXJj ZS9XZWJLaXQvQ2hhbmdlTG9nCkBAIC0xLDMgKzEsMzQgQEAKKzIwMjItMDMtMTEgIENocmlzIER1 bWV6ICA8Y2R1bWV6QGFwcGxlLmNvbT4KKworICAgICAgICBEZWxheSByZXNwb25zaXZlbmVzcyBj aGVja3MgZm9yIHRoZSBOZXR3b3JrIFByb2Nlc3MgdW50aWwgaXQgaGFzIGZpbmlzaGVkIGluaXRp YWxpemF0aW9uCisgICAgICAgIGh0dHBzOi8vYnVncy53ZWJraXQub3JnL3Nob3dfYnVnLmNnaT9p ZD0yMzc3ODIKKyAgICAgICAgPHJkYXI6Ly84ODIyNjQxMj4KKworICAgICAgICBSZXZpZXdlZCBi eSBOT0JPRFkgKE9PUFMhKS4KKworICAgICAgICBEZWxheSByZXNwb25zaXZlbmVzcyBjaGVja3Mg 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