Messages in this thread | | | Date | Wed, 15 Apr 2015 20:37:12 +0200 | From | Greg Kroah-Hartman <> | Subject | Re: [GIT PULL] kdbus for 4.1-rc1 |
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On Wed, Apr 15, 2015 at 11:28:58AM -0700, Linus Torvalds wrote: > On Wed, Apr 15, 2015 at 11:18 AM, Linus Torvalds > <torvalds@linux-foundation.org> wrote: > > > > I've seen this claimed, but I have never seen any actual numbers. What > > speeds up? By how much? is it actually measurable? > > And just to clarify: by "what speeds up, and by how much", I do _not_ > mean "sending a dbus message speeds up by 10x and avoids context > switches". I've seen _those_ numbers. But does it actually matter? > > It was more of a "there are thousands of dbus messages during boot, > but can you actually measure the speedup?" question. That's the kind > of numbers I've not seen.
Someone from BMW did the testing on one of their car systems a while ago and posted some numbers, it was a factor of 10 faster. I'll try to dig it up, but it was burried in a powerpoint presentation, so it might be hard to find, give me a day.
thanks,
greg k-h
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