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@@ -1459,10 +1459,26 @@ used as file name to store the model.
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@item @code{cost_function}: Used by @code{STARPU_COMMON}: takes a task and
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implementation number, and must return a task duration estimation in micro-seconds.
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@item @code{per_arch}: Used by @code{STARPU_PER_ARCH}: array of @code{struct
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-starpu_per_arch_perfmodel} structures, whose @code{cost_function} fields must
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-point to functions which take a task, the target arch and implementation number
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-(as mere conveniency, since the array is already indexed by these), and must
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-return a task duration estimation in micro-seconds.
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+starpu_per_arch_perfmodel} structures.
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+@end table
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+@end deftp
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+
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+@deftp {Data Type} {struct starpu_per_arch_perfmodel}
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+contains information about the performance model of a given arch.
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+
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+@table @asis
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+@item @code{cost_function}
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+Used by @code{STARPU_PER_ARCH}, must point to functions which take a task, the
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+target arch and implementation number (as mere conveniency, since the array
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+is already indexed by these), and must return a task duration estimation in
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+micro-seconds.
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+@item @code{list}
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+Used by @code{STARPU_HISTORY_BASED} and @code{STARPU_NL_REGRESSION_BASED},
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+records all execution history measures.
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+@item @code{regression}
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+Used by @code{STARPU_HISTORY_REGRESION_BASED} and
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+@code{STARPU_NL_REGRESSION_BASED}, contains the estimated factors of the
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+regression.
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@end table
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@end deftp
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