Messages in this thread |  | | Date | Thu, 23 Oct 2014 13:04:38 +0200 | From | Peter Zijlstra <> | Subject | Re: [RFC][PATCH 0/6] Another go at speculative page faults |
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On Thu, Oct 23, 2014 at 06:40:05PM +0800, Lai Jiangshan wrote: > On 10/22/2014 01:56 AM, Peter Zijlstra wrote: > > On Tue, Oct 21, 2014 at 08:09:48PM +0300, Kirill A. Shutemov wrote: > >> It would be interesting to see if the patchset affects non-condended case. > >> Like a one-threaded workload. > > > > It does, and not in a good way, I'll have to look at that... :/ > > Maybe it is blamed to find_vma_srcu() that it doesn't take the advantage of > the vmacache_find() and cause more cache-misses.
Its what I thought initially, I tried doing perf record with and without, but then I ran into perf diff not quite working for me and I've yet to find time to kick that thing into shape.
> Is it hard to use the vmacache in the find_vma_srcu()?
I've not had time to look at it.
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