Messages in this thread | | | Subject | Re: Perf: Preserving the event across CPU hotunplug/plug and Creation of an event on offine CPU | From | Mukesh Ojha <> | Date | Tue, 28 May 2019 21:46:42 +0530 |
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Friendly Ping.
On 5/23/2019 6:39 PM, Mukesh Ojha wrote: > Hi Peter/All, > > This is regarding the discussion happen in the past about > https://lkml.org/lkml/2018/2/15/1324 > > Where the exact ask is to allow preserving and creation of events on a > offline CPU, so that when the CPU > comes online it will start counting. > > I had a look at your patch too and resolve crash during while trying > to create an event on an offline cpu. > > In your patch, you seem to disable event when cpu goes offline which > is exactly deleting the event > from the pmu and add when it comes online, it seems to work. > > But, For the purpose of allowing the creation of event while CPU is > offline is not able to count event while > CPU coming online, for that i did some change, that did work. > > Also, I have query about the events which gets destroyed while CPU is > offline and we need to remove them > once cpu comes online right ? As Raghavendra also queried the same in > the above thread. > > Don't we need a list where we maintain the events which gets > destroyed while CPU is dead ? > and clean it up when CPU comes online ? > > Thanks. > Mukesh > >
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