Date: Wed, 09 Nov 2016 18:12:36 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-virtualization@FreeBSD.org Subject: [Bug 203682] Slow boot under VMware Fusion w/ UEFI firmware and SMP -- until APs are launched Message-ID: <bug-203682-27103-MiIkrW67R2@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-203682-27103@https.bugs.freebsd.org/bugzilla/> References: <bug-203682-27103@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=203682 --- Comment #8 from John Baldwin <jhb@FreeBSD.org> --- The problem with monitor/mwait is that it has to be emulated by the hypervisor (you get a VM-exit for it), but that's actually hard to do because the hypervisor can't tell when the relevant line is going to be updated (I'm pretty sure that bhyve just returns immediately from mwait for example). We can however put the APs to sleep while spinning on aps_ready via hlt and use an IPI to resume them. This should work with most if not all hypervisors. That said, I do plan to enable EARLY_AP_STARTUP in 12 anyway (perhaps I'll do it at the vendor summit later this week). -- You are receiving this mail because: You are the assignee for the bug.
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