Messages in this thread | | | From | KOSAKI Motohiro <> | Subject | Re: [PATCH] Add tracepoints to track pagecache transition | Date | Fri, 20 Feb 2009 10:13:37 +0900 (JST) |
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Hi
> > > Currently, we can understand the amount of pagecache from "Cached" > > > in /proc/meminfo. So I'd like to understand which files are using pagecache. > > > > There is one meta question, Why do you think file-by-file pagecache > > infomartion is valueable? > > One might take a look at Marcello Tosatti's old 'vmtrace' patch. It > contains it's own data store/transport via relayfs, but the trace points > could be ported to the current kernel tracing infrastructure. > > Here's a starting point: http://linux-mm.org/VmTrace > > Quoting from that page: > > >From the previous email to linux-mm: > >"The sequence of pages which a given process or workload accesses > >during its lifetime, a.k.a. "reference trace", is very important > >information. It has been used in the past for comparison of page > >replacement algorithms and other optimizations..."
Sure. but strong difference exist.
vmtrace - can run standalone - reviewer can confirm its output result is useful or not.
Christoph also explained reason more kindly. I think we need useful consumer.
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