On 14/05/17 20:58, Ben Hutchings wrote: > On Sun, 2017-05-14 at 10:43 +0200, Tomasz Buchert wrote: > > On 12/05/17 18:54, Nathaniel Beaver wrote: > > > [...] > > > > Thank you, Nathaniel. > > > > I confirm the problem. A safe bet is that > > https://lkml.org/lkml/2016/1/11/587 is the cause. You can verify that > > /proc/sys/kernel/perf_event_paranoid contains "3". By running > > > > echo 2 | sudo tee /proc/sys/kernel/perf_event_paranoid > > > > you should be able to use tiptop as a normal user again. > > > > I doubt that we can switch the default value in Debian kernels to "2", > > so I have to say that simply the tiptop website is not up-to-date, at > > least with respect to the Debian kernels (but also likely to other > > distributions as well). I'm CCing Ben to let him comment on this. > > The Debian kernel default is not going to be changed in the short term. > In the long term it's conceivable that performance events will > eventually become sufficiently robust that it would be reasonable to > change the default. > > Ben. > > -- > Ben Hutchings - Debian developer, member of kernel, installer and LTS teams
Thank you! Nathaniel, I'll keep this bug open till possibly the perf events will become available for normal users. Till then I require you to use the workaround above if you feel like it. Cheers, Tomasz
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