Selon Guillaume Thouvenin <guillaume.thouvenin@polymtl.ca>:
> Is there a way to get information about I/O like how many blocks and char
> read
> or wrote by a process? This kind of information is available per-cpu but I
> don't
> find it per-process. Field "io_context" find in the task_struct doesn't give
> this information.
>
> I ask that because I wanted to use information given by BSD process
> accounting
> but this information isn't complete. In particular in do_acct_process():
>
> ...
> ac.ac_io = encode_comp_t(0 /* current->io_usage */); /* %% */
> ac.ac_rw = encode_comp_t(ac.ac_io / 1024);
> ...
It's the same for the rusage structure. Fields about IO are present (ru_inblock,
ru_outblock, ...) but they are not updated. When you get information using
getrusage, there is only values that already are in the task_struct that are
updated.
Thanks for your help,
Guillaume
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