mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
83 lines
2.1 KiB
83 lines
2.1 KiB
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB |
|
/* |
|
* Copyright (c) 2019, Mellanox Technologies inc. All rights reserved. |
|
*/ |
|
|
|
#include <linux/dim.h> |
|
|
|
bool dim_on_top(struct dim *dim) |
|
{ |
|
switch (dim->tune_state) { |
|
case DIM_PARKING_ON_TOP: |
|
case DIM_PARKING_TIRED: |
|
return true; |
|
case DIM_GOING_RIGHT: |
|
return (dim->steps_left > 1) && (dim->steps_right == 1); |
|
default: /* DIM_GOING_LEFT */ |
|
return (dim->steps_right > 1) && (dim->steps_left == 1); |
|
} |
|
} |
|
EXPORT_SYMBOL(dim_on_top); |
|
|
|
void dim_turn(struct dim *dim) |
|
{ |
|
switch (dim->tune_state) { |
|
case DIM_PARKING_ON_TOP: |
|
case DIM_PARKING_TIRED: |
|
break; |
|
case DIM_GOING_RIGHT: |
|
dim->tune_state = DIM_GOING_LEFT; |
|
dim->steps_left = 0; |
|
break; |
|
case DIM_GOING_LEFT: |
|
dim->tune_state = DIM_GOING_RIGHT; |
|
dim->steps_right = 0; |
|
break; |
|
} |
|
} |
|
EXPORT_SYMBOL(dim_turn); |
|
|
|
void dim_park_on_top(struct dim *dim) |
|
{ |
|
dim->steps_right = 0; |
|
dim->steps_left = 0; |
|
dim->tired = 0; |
|
dim->tune_state = DIM_PARKING_ON_TOP; |
|
} |
|
EXPORT_SYMBOL(dim_park_on_top); |
|
|
|
void dim_park_tired(struct dim *dim) |
|
{ |
|
dim->steps_right = 0; |
|
dim->steps_left = 0; |
|
dim->tune_state = DIM_PARKING_TIRED; |
|
} |
|
EXPORT_SYMBOL(dim_park_tired); |
|
|
|
void dim_calc_stats(struct dim_sample *start, struct dim_sample *end, |
|
struct dim_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); |
|
u32 ncomps = BIT_GAP(BITS_PER_TYPE(u32), end->comp_ctr, |
|
start->comp_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(DIM_NEVENTS * USEC_PER_MSEC, |
|
delta_us); |
|
curr_stats->cpms = DIV_ROUND_UP(ncomps * USEC_PER_MSEC, delta_us); |
|
if (curr_stats->epms != 0) |
|
curr_stats->cpe_ratio = DIV_ROUND_DOWN_ULL( |
|
curr_stats->cpms * 100, curr_stats->epms); |
|
else |
|
curr_stats->cpe_ratio = 0; |
|
|
|
} |
|
EXPORT_SYMBOL(dim_calc_stats);
|
|
|