Messages in this thread |  | | | Date | Thu, 15 Dec 2005 04:33:54 +0100 | | From | Andi Kleen <> | | Subject | Re: [patch 1/6] statistics infrastructure - prerequisite: scatter-gather ringbuffer |
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> Relayfs seems to be the right thing to convey streams of incremental > pieces of data, like trace records as implemented by > arch/s390/kernel/debug.c, for example. Relayfs would work for statistics > that involve data growth like a history of a counter, for example, or > the raw measurement data reported for statistic updates. I doubt it is > the right thing for counters, fill level indicators and histograms;
For those we traditionally use ASCII files if the data is small. If it's big relayfs is probably the right answer.
> basically for all types of statistics that do not continuously put their > hands on untouched memory to store their results. > > I am currently using debugfs, which works fine for all of these cases. > In addition, I need some ringbuffer functionality, though.
IIRC relayfs was changed to be able to handle files in debuggfs by just plugging in the file operations.
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