|
|
@@ -1,341 +0,0 @@
|
|
|
-/*
|
|
|
- * Copyright (c) 2016, Mellanox Technologies. All rights reserved.
|
|
|
- *
|
|
|
- * This software is available to you under a choice of one of two
|
|
|
- * licenses. You may choose to be licensed under the terms of the GNU
|
|
|
- * General Public License (GPL) Version 2, available from the file
|
|
|
- * COPYING in the main directory of this source tree, or the
|
|
|
- * OpenIB.org BSD license below:
|
|
|
- *
|
|
|
- * Redistribution and use in source and binary forms, with or
|
|
|
- * without modification, are permitted provided that the following
|
|
|
- * conditions are met:
|
|
|
- *
|
|
|
- * - Redistributions of source code must retain the above
|
|
|
- * copyright notice, this list of conditions and the following
|
|
|
- * disclaimer.
|
|
|
- *
|
|
|
- * - Redistributions in binary form must reproduce the above
|
|
|
- * copyright notice, this list of conditions and the following
|
|
|
- * disclaimer in the documentation and/or other materials
|
|
|
- * provided with the distribution.
|
|
|
- *
|
|
|
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
|
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
|
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
|
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
|
|
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
|
|
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
|
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
|
- * SOFTWARE.
|
|
|
- */
|
|
|
-
|
|
|
-#include "en.h"
|
|
|
-
|
|
|
-/* Adaptive moderation profiles */
|
|
|
-#define MLX5E_AM_DEFAULT_RX_CQ_MODERATION_PKTS_FROM_EQE 256
|
|
|
-#define MLX5E_RX_AM_DEF_PROFILE_CQE 1
|
|
|
-#define MLX5E_RX_AM_DEF_PROFILE_EQE 1
|
|
|
-#define MLX5E_PARAMS_AM_NUM_PROFILES 5
|
|
|
-
|
|
|
-/* All profiles sizes must be MLX5E_PARAMS_AM_NUM_PROFILES */
|
|
|
-#define MLX5_AM_EQE_PROFILES { \
|
|
|
- {1, MLX5E_AM_DEFAULT_RX_CQ_MODERATION_PKTS_FROM_EQE}, \
|
|
|
- {8, MLX5E_AM_DEFAULT_RX_CQ_MODERATION_PKTS_FROM_EQE}, \
|
|
|
- {64, MLX5E_AM_DEFAULT_RX_CQ_MODERATION_PKTS_FROM_EQE}, \
|
|
|
- {128, MLX5E_AM_DEFAULT_RX_CQ_MODERATION_PKTS_FROM_EQE}, \
|
|
|
- {256, MLX5E_AM_DEFAULT_RX_CQ_MODERATION_PKTS_FROM_EQE}, \
|
|
|
-}
|
|
|
-
|
|
|
-#define MLX5_AM_CQE_PROFILES { \
|
|
|
- {2, 256}, \
|
|
|
- {8, 128}, \
|
|
|
- {16, 64}, \
|
|
|
- {32, 64}, \
|
|
|
- {64, 64} \
|
|
|
-}
|
|
|
-
|
|
|
-static const struct mlx5e_cq_moder
|
|
|
-profile[MLX5_CQ_PERIOD_NUM_MODES][MLX5E_PARAMS_AM_NUM_PROFILES] = {
|
|
|
- MLX5_AM_EQE_PROFILES,
|
|
|
- MLX5_AM_CQE_PROFILES,
|
|
|
-};
|
|
|
-
|
|
|
-static inline struct mlx5e_cq_moder mlx5e_am_get_profile(u8 cq_period_mode, int ix)
|
|
|
-{
|
|
|
- struct mlx5e_cq_moder cq_moder;
|
|
|
-
|
|
|
- cq_moder = profile[cq_period_mode][ix];
|
|
|
- cq_moder.cq_period_mode = cq_period_mode;
|
|
|
- return cq_moder;
|
|
|
-}
|
|
|
-
|
|
|
-struct mlx5e_cq_moder mlx5e_am_get_def_profile(u8 rx_cq_period_mode)
|
|
|
-{
|
|
|
- int default_profile_ix;
|
|
|
-
|
|
|
- if (rx_cq_period_mode == MLX5_CQ_PERIOD_MODE_START_FROM_CQE)
|
|
|
- default_profile_ix = MLX5E_RX_AM_DEF_PROFILE_CQE;
|
|
|
- else /* MLX5_CQ_PERIOD_MODE_START_FROM_EQE */
|
|
|
- default_profile_ix = MLX5E_RX_AM_DEF_PROFILE_EQE;
|
|
|
-
|
|
|
- return mlx5e_am_get_profile(rx_cq_period_mode, default_profile_ix);
|
|
|
-}
|
|
|
-
|
|
|
-/* Adaptive moderation logic */
|
|
|
-enum {
|
|
|
- MLX5E_AM_START_MEASURE,
|
|
|
- MLX5E_AM_MEASURE_IN_PROGRESS,
|
|
|
- MLX5E_AM_APPLY_NEW_PROFILE,
|
|
|
-};
|
|
|
-
|
|
|
-enum {
|
|
|
- MLX5E_AM_PARKING_ON_TOP,
|
|
|
- MLX5E_AM_PARKING_TIRED,
|
|
|
- MLX5E_AM_GOING_RIGHT,
|
|
|
- MLX5E_AM_GOING_LEFT,
|
|
|
-};
|
|
|
-
|
|
|
-enum {
|
|
|
- MLX5E_AM_STATS_WORSE,
|
|
|
- MLX5E_AM_STATS_SAME,
|
|
|
- MLX5E_AM_STATS_BETTER,
|
|
|
-};
|
|
|
-
|
|
|
-enum {
|
|
|
- MLX5E_AM_STEPPED,
|
|
|
- MLX5E_AM_TOO_TIRED,
|
|
|
- MLX5E_AM_ON_EDGE,
|
|
|
-};
|
|
|
-
|
|
|
-static bool mlx5e_am_on_top(struct mlx5e_rx_am *am)
|
|
|
-{
|
|
|
- switch (am->tune_state) {
|
|
|
- case MLX5E_AM_PARKING_ON_TOP:
|
|
|
- case MLX5E_AM_PARKING_TIRED:
|
|
|
- return true;
|
|
|
- case MLX5E_AM_GOING_RIGHT:
|
|
|
- return (am->steps_left > 1) && (am->steps_right == 1);
|
|
|
- default: /* MLX5E_AM_GOING_LEFT */
|
|
|
- return (am->steps_right > 1) && (am->steps_left == 1);
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-static void mlx5e_am_turn(struct mlx5e_rx_am *am)
|
|
|
-{
|
|
|
- switch (am->tune_state) {
|
|
|
- case MLX5E_AM_PARKING_ON_TOP:
|
|
|
- case MLX5E_AM_PARKING_TIRED:
|
|
|
- break;
|
|
|
- case MLX5E_AM_GOING_RIGHT:
|
|
|
- am->tune_state = MLX5E_AM_GOING_LEFT;
|
|
|
- am->steps_left = 0;
|
|
|
- break;
|
|
|
- case MLX5E_AM_GOING_LEFT:
|
|
|
- am->tune_state = MLX5E_AM_GOING_RIGHT;
|
|
|
- am->steps_right = 0;
|
|
|
- break;
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-static int mlx5e_am_step(struct mlx5e_rx_am *am)
|
|
|
-{
|
|
|
- if (am->tired == (MLX5E_PARAMS_AM_NUM_PROFILES * 2))
|
|
|
- return MLX5E_AM_TOO_TIRED;
|
|
|
-
|
|
|
- switch (am->tune_state) {
|
|
|
- case MLX5E_AM_PARKING_ON_TOP:
|
|
|
- case MLX5E_AM_PARKING_TIRED:
|
|
|
- break;
|
|
|
- case MLX5E_AM_GOING_RIGHT:
|
|
|
- if (am->profile_ix == (MLX5E_PARAMS_AM_NUM_PROFILES - 1))
|
|
|
- return MLX5E_AM_ON_EDGE;
|
|
|
- am->profile_ix++;
|
|
|
- am->steps_right++;
|
|
|
- break;
|
|
|
- case MLX5E_AM_GOING_LEFT:
|
|
|
- if (am->profile_ix == 0)
|
|
|
- return MLX5E_AM_ON_EDGE;
|
|
|
- am->profile_ix--;
|
|
|
- am->steps_left++;
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- am->tired++;
|
|
|
- return MLX5E_AM_STEPPED;
|
|
|
-}
|
|
|
-
|
|
|
-static void mlx5e_am_park_on_top(struct mlx5e_rx_am *am)
|
|
|
-{
|
|
|
- am->steps_right = 0;
|
|
|
- am->steps_left = 0;
|
|
|
- am->tired = 0;
|
|
|
- am->tune_state = MLX5E_AM_PARKING_ON_TOP;
|
|
|
-}
|
|
|
-
|
|
|
-static void mlx5e_am_park_tired(struct mlx5e_rx_am *am)
|
|
|
-{
|
|
|
- am->steps_right = 0;
|
|
|
- am->steps_left = 0;
|
|
|
- am->tune_state = MLX5E_AM_PARKING_TIRED;
|
|
|
-}
|
|
|
-
|
|
|
-static void mlx5e_am_exit_parking(struct mlx5e_rx_am *am)
|
|
|
-{
|
|
|
- am->tune_state = am->profile_ix ? MLX5E_AM_GOING_LEFT :
|
|
|
- MLX5E_AM_GOING_RIGHT;
|
|
|
- mlx5e_am_step(am);
|
|
|
-}
|
|
|
-
|
|
|
-#define IS_SIGNIFICANT_DIFF(val, ref) \
|
|
|
- (((100 * abs((val) - (ref))) / (ref)) > 10) /* more than 10% difference */
|
|
|
-
|
|
|
-static int mlx5e_am_stats_compare(struct mlx5e_rx_am_stats *curr,
|
|
|
- struct mlx5e_rx_am_stats *prev)
|
|
|
-{
|
|
|
- if (!prev->bpms)
|
|
|
- return curr->bpms ? MLX5E_AM_STATS_BETTER :
|
|
|
- MLX5E_AM_STATS_SAME;
|
|
|
-
|
|
|
- if (IS_SIGNIFICANT_DIFF(curr->bpms, prev->bpms))
|
|
|
- return (curr->bpms > prev->bpms) ? MLX5E_AM_STATS_BETTER :
|
|
|
- MLX5E_AM_STATS_WORSE;
|
|
|
-
|
|
|
- if (IS_SIGNIFICANT_DIFF(curr->ppms, prev->ppms))
|
|
|
- return (curr->ppms > prev->ppms) ? MLX5E_AM_STATS_BETTER :
|
|
|
- MLX5E_AM_STATS_WORSE;
|
|
|
-
|
|
|
- if (IS_SIGNIFICANT_DIFF(curr->epms, prev->epms))
|
|
|
- return (curr->epms < prev->epms) ? MLX5E_AM_STATS_BETTER :
|
|
|
- MLX5E_AM_STATS_WORSE;
|
|
|
-
|
|
|
- return MLX5E_AM_STATS_SAME;
|
|
|
-}
|
|
|
-
|
|
|
-static bool mlx5e_am_decision(struct mlx5e_rx_am_stats *curr_stats,
|
|
|
- struct mlx5e_rx_am *am)
|
|
|
-{
|
|
|
- int prev_state = am->tune_state;
|
|
|
- int prev_ix = am->profile_ix;
|
|
|
- int stats_res;
|
|
|
- int step_res;
|
|
|
-
|
|
|
- switch (am->tune_state) {
|
|
|
- case MLX5E_AM_PARKING_ON_TOP:
|
|
|
- stats_res = mlx5e_am_stats_compare(curr_stats, &am->prev_stats);
|
|
|
- if (stats_res != MLX5E_AM_STATS_SAME)
|
|
|
- mlx5e_am_exit_parking(am);
|
|
|
- break;
|
|
|
-
|
|
|
- case MLX5E_AM_PARKING_TIRED:
|
|
|
- am->tired--;
|
|
|
- if (!am->tired)
|
|
|
- mlx5e_am_exit_parking(am);
|
|
|
- break;
|
|
|
-
|
|
|
- case MLX5E_AM_GOING_RIGHT:
|
|
|
- case MLX5E_AM_GOING_LEFT:
|
|
|
- stats_res = mlx5e_am_stats_compare(curr_stats, &am->prev_stats);
|
|
|
- if (stats_res != MLX5E_AM_STATS_BETTER)
|
|
|
- mlx5e_am_turn(am);
|
|
|
-
|
|
|
- if (mlx5e_am_on_top(am)) {
|
|
|
- mlx5e_am_park_on_top(am);
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- step_res = mlx5e_am_step(am);
|
|
|
- switch (step_res) {
|
|
|
- case MLX5E_AM_ON_EDGE:
|
|
|
- mlx5e_am_park_on_top(am);
|
|
|
- break;
|
|
|
- case MLX5E_AM_TOO_TIRED:
|
|
|
- mlx5e_am_park_tired(am);
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- if ((prev_state != MLX5E_AM_PARKING_ON_TOP) ||
|
|
|
- (am->tune_state != MLX5E_AM_PARKING_ON_TOP))
|
|
|
- am->prev_stats = *curr_stats;
|
|
|
-
|
|
|
- return am->profile_ix != prev_ix;
|
|
|
-}
|
|
|
-
|
|
|
-static void mlx5e_am_sample(struct mlx5e_rq *rq,
|
|
|
- struct mlx5e_rx_am_sample *s)
|
|
|
-{
|
|
|
- s->time = ktime_get();
|
|
|
- s->pkt_ctr = rq->stats.packets;
|
|
|
- s->byte_ctr = rq->stats.bytes;
|
|
|
- s->event_ctr = rq->cq.event_ctr;
|
|
|
-}
|
|
|
-
|
|
|
-#define MLX5E_AM_NEVENTS 64
|
|
|
-#define BITS_PER_TYPE(type) (sizeof(type) * BITS_PER_BYTE)
|
|
|
-#define BIT_GAP(bits, end, start) ((((end) - (start)) + BIT_ULL(bits)) & (BIT_ULL(bits) - 1))
|
|
|
-
|
|
|
-static void mlx5e_am_calc_stats(struct mlx5e_rx_am_sample *start,
|
|
|
- struct mlx5e_rx_am_sample *end,
|
|
|
- struct mlx5e_rx_am_stats *curr_stats)
|
|
|
-{
|
|
|
- /* u32 holds up to 71 minutes, should be enough */
|
|
|
- u32 delta_us = ktime_us_delta(end->time, start->time);
|
|
|
- u32 npkts = BIT_GAP(BITS_PER_TYPE(u32), end->pkt_ctr, start->pkt_ctr);
|
|
|
- u32 nbytes = BIT_GAP(BITS_PER_TYPE(u32), end->byte_ctr,
|
|
|
- start->byte_ctr);
|
|
|
-
|
|
|
- if (!delta_us)
|
|
|
- return;
|
|
|
-
|
|
|
- curr_stats->ppms = DIV_ROUND_UP(npkts * USEC_PER_MSEC, delta_us);
|
|
|
- curr_stats->bpms = DIV_ROUND_UP(nbytes * USEC_PER_MSEC, delta_us);
|
|
|
- curr_stats->epms = DIV_ROUND_UP(MLX5E_AM_NEVENTS * USEC_PER_MSEC,
|
|
|
- delta_us);
|
|
|
-}
|
|
|
-
|
|
|
-void mlx5e_rx_am_work(struct work_struct *work)
|
|
|
-{
|
|
|
- struct mlx5e_rx_am *am = container_of(work, struct mlx5e_rx_am,
|
|
|
- work);
|
|
|
- struct mlx5e_rq *rq = container_of(am, struct mlx5e_rq, am);
|
|
|
- struct mlx5e_cq_moder cur_profile = profile[am->mode][am->profile_ix];
|
|
|
-
|
|
|
- mlx5_core_modify_cq_moderation(rq->mdev, &rq->cq.mcq,
|
|
|
- cur_profile.usec, cur_profile.pkts);
|
|
|
-
|
|
|
- am->state = MLX5E_AM_START_MEASURE;
|
|
|
-}
|
|
|
-
|
|
|
-void mlx5e_rx_am(struct mlx5e_rq *rq)
|
|
|
-{
|
|
|
- struct mlx5e_rx_am *am = &rq->am;
|
|
|
- struct mlx5e_rx_am_sample end_sample;
|
|
|
- struct mlx5e_rx_am_stats curr_stats;
|
|
|
- u16 nevents;
|
|
|
-
|
|
|
- switch (am->state) {
|
|
|
- case MLX5E_AM_MEASURE_IN_PROGRESS:
|
|
|
- nevents = BIT_GAP(BITS_PER_TYPE(u16), rq->cq.event_ctr,
|
|
|
- am->start_sample.event_ctr);
|
|
|
- if (nevents < MLX5E_AM_NEVENTS)
|
|
|
- break;
|
|
|
- mlx5e_am_sample(rq, &end_sample);
|
|
|
- mlx5e_am_calc_stats(&am->start_sample, &end_sample,
|
|
|
- &curr_stats);
|
|
|
- if (mlx5e_am_decision(&curr_stats, am)) {
|
|
|
- am->state = MLX5E_AM_APPLY_NEW_PROFILE;
|
|
|
- schedule_work(&am->work);
|
|
|
- break;
|
|
|
- }
|
|
|
- /* fall through */
|
|
|
- case MLX5E_AM_START_MEASURE:
|
|
|
- mlx5e_am_sample(rq, &am->start_sample);
|
|
|
- am->state = MLX5E_AM_MEASURE_IN_PROGRESS;
|
|
|
- break;
|
|
|
- case MLX5E_AM_APPLY_NEW_PROFILE:
|
|
|
- break;
|
|
|
- }
|
|
|
-}
|
David S. Miller