Messages in this thread |  | | Date | Fri, 24 Oct 2014 09:54:23 +0200 | From | Ingo Molnar <> | Subject | Re: [RFC][PATCH 0/6] Another go at speculative page faults |
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* Peter Zijlstra <peterz@infradead.org> wrote:
> 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.
Might be the 'perf diff' regression fixed by this:
9ab1f50876db perf diff: Add missing hists__init() call at tool start
I just pushed it out into tip:master.
Thanks,
Ingo
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