9069a3817d
Implement simple greedy algo to find more optimized root-delta tree for a given objagg instance. This "hints" can be used by a driver to: 1) check if the hints are better (driver's choice) than the original objagg tree. Driver does comparison of objagg stats and hints stats. 2) use the hints to create a new objagg instance which will construct the root-delta tree according to the passed hints. Currently, only a simple greedy algorithm is implemented. Basically it finds the roots according to the maximal possible user count including deltas. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
63 lines
2.0 KiB
C
63 lines
2.0 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */
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/* Copyright (c) 2018 Mellanox Technologies. All rights reserved */
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#ifndef _OBJAGG_H
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#define _OBJAGG_H
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struct objagg_ops {
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size_t obj_size;
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bool (*delta_check)(void *priv, const void *parent_obj,
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const void *obj);
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int (*hints_obj_cmp)(const void *obj1, const void *obj2);
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void * (*delta_create)(void *priv, void *parent_obj, void *obj);
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void (*delta_destroy)(void *priv, void *delta_priv);
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void * (*root_create)(void *priv, void *obj, unsigned int root_id);
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#define OBJAGG_OBJ_ROOT_ID_INVALID UINT_MAX
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void (*root_destroy)(void *priv, void *root_priv);
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};
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struct objagg;
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struct objagg_obj;
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struct objagg_hints;
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const void *objagg_obj_root_priv(const struct objagg_obj *objagg_obj);
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const void *objagg_obj_delta_priv(const struct objagg_obj *objagg_obj);
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const void *objagg_obj_raw(const struct objagg_obj *objagg_obj);
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struct objagg_obj *objagg_obj_get(struct objagg *objagg, void *obj);
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void objagg_obj_put(struct objagg *objagg, struct objagg_obj *objagg_obj);
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struct objagg *objagg_create(const struct objagg_ops *ops,
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struct objagg_hints *hints, void *priv);
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void objagg_destroy(struct objagg *objagg);
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struct objagg_obj_stats {
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unsigned int user_count;
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unsigned int delta_user_count; /* includes delta object users */
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};
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struct objagg_obj_stats_info {
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struct objagg_obj_stats stats;
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struct objagg_obj *objagg_obj; /* associated object */
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bool is_root;
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};
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struct objagg_stats {
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unsigned int stats_info_count;
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struct objagg_obj_stats_info stats_info[];
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};
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const struct objagg_stats *objagg_stats_get(struct objagg *objagg);
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void objagg_stats_put(const struct objagg_stats *objagg_stats);
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enum objagg_opt_algo_type {
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OBJAGG_OPT_ALGO_SIMPLE_GREEDY,
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};
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struct objagg_hints *objagg_hints_get(struct objagg *objagg,
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enum objagg_opt_algo_type opt_algo_type);
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void objagg_hints_put(struct objagg_hints *objagg_hints);
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const struct objagg_stats *
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objagg_hints_stats_get(struct objagg_hints *objagg_hints);
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#endif
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