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net/mlx5e: Move dynamic interrupt coalescing code to include/linux

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This move allows drivers to add private structure elements to track the
number of packets, bytes, and interrupts events per ring.  A driver
also defines a workqueue handler to act on this collected data once per
poll and modify the coalescing parameters per ring.

Signed-off-by: Andy Gospodarek <gospo@broadcom.com>
Acked-by: Tal Gilboa <talgi@mellanox.com>
Acked-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andy Gospodarek 2018-01-09 16:06:18 -05:00 committed by David S. Miller
parent 9a31742531
commit 4c4dbb4a73
5 changed files with 97 additions and 134 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/net/ethernet/mellanox/mlx5/core/Makefile
View file

@ -15,7 +15,7 @@ mlx5_core-$(CONFIG_MLX5_FPGA) += fpga/cmd.o fpga/core.o fpga/conn.o fpga/sdk.o \
mlx5_core-$(CONFIG_MLX5_CORE_EN) += en_main.o en_common.o en_fs.o en_ethtool.o \ mlx5_core-$(CONFIG_MLX5_CORE_EN) += en_main.o en_common.o en_fs.o en_ethtool.o \
en_tx.o en_rx.o en_dim.o en_txrx.o en_stats.o vxlan.o \ en_tx.o en_rx.o en_dim.o en_txrx.o en_stats.o vxlan.o \
en_arfs.o en_fs_ethtool.o en_selftest.o net_dim.o en_arfs.o en_fs_ethtool.o en_selftest.o
mlx5_core-$(CONFIG_MLX5_MPFS) += lib/mpfs.o mlx5_core-$(CONFIG_MLX5_MPFS) += lib/mpfs.o

2
drivers/net/ethernet/mellanox/mlx5/core/en.h
View file

@ -47,10 +47,10 @@
#include <linux/rhashtable.h> #include <linux/rhashtable.h>
#include <net/switchdev.h> #include <net/switchdev.h>
#include <net/xdp.h> #include <net/xdp.h>
#include <linux/net_dim.h>
#include "wq.h" #include "wq.h"
#include "mlx5_core.h" #include "mlx5_core.h"
#include "en_stats.h" #include "en_stats.h"
#include "net_dim.h"
#define MLX5_SET_CFG(p, f, v) MLX5_SET(create_flow_group_in, p, f, v) #define MLX5_SET_CFG(p, f, v) MLX5_SET(create_flow_group_in, p, f, v)

1
drivers/net/ethernet/mellanox/mlx5/core/en_dim.c
View file

@ -30,6 +30,7 @@
* SOFTWARE. * SOFTWARE.
*/ */
#include <linux/net_dim.h>
#include "en.h" #include "en.h"
void mlx5e_rx_dim_work(struct work_struct *work) void mlx5e_rx_dim_work(struct work_struct *work)

108
drivers/net/ethernet/mellanox/mlx5/core/net_dim.h
View file

@ -1,108 +0,0 @@
/*
* Copyright (c) 2013-2015, Mellanox Technologies, Ltd. All rights reserved.
* Copyright (c) 2017-2018, Broadcom Limited. 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.
*/
#ifndef NET_DIM_H
#define NET_DIM_H
struct net_dim_cq_moder {
u16 usec;
u16 pkts;
u8 cq_period_mode;
};
struct net_dim_sample {
ktime_t time;
u32 pkt_ctr;
u32 byte_ctr;
u16 event_ctr;
};
struct net_dim_stats {
int ppms; /* packets per msec */
int bpms; /* bytes per msec */
int epms; /* events per msec */
};
struct net_dim { /* Adaptive Moderation */
u8 state;
struct net_dim_stats prev_stats;
struct net_dim_sample start_sample;
struct work_struct work;
u8 profile_ix;
u8 mode;
u8 tune_state;
u8 steps_right;
u8 steps_left;
u8 tired;
};
enum {
NET_DIM_CQ_PERIOD_MODE_START_FROM_EQE = 0x0,
NET_DIM_CQ_PERIOD_MODE_START_FROM_CQE = 0x1,
NET_DIM_CQ_PERIOD_NUM_MODES
};
/* Adaptive moderation logic */
enum {
NET_DIM_START_MEASURE,
NET_DIM_MEASURE_IN_PROGRESS,
NET_DIM_APPLY_NEW_PROFILE,
};
enum {
NET_DIM_PARKING_ON_TOP,
NET_DIM_PARKING_TIRED,
NET_DIM_GOING_RIGHT,
NET_DIM_GOING_LEFT,
};
enum {
NET_DIM_STATS_WORSE,
NET_DIM_STATS_SAME,
NET_DIM_STATS_BETTER,
};
enum {
NET_DIM_STEPPED,
NET_DIM_TOO_TIRED,
NET_DIM_ON_EDGE,
};
void net_dim(struct net_dim *dim,
u16 event_ctr,
u64 packets,
u64 bytes);
struct net_dim_cq_moder net_dim_get_def_profile(u8 rx_cq_period_mode);
struct net_dim_cq_moder net_dim_get_profile(u8 cq_period_mode, int ix);
#endif /* NET_DIM_H */

118
drivers/net/ethernet/mellanox/mlx5/core/net_dim.c → include/linux/net_dim.h
View file

@ -31,7 +31,74 @@
* SOFTWARE. * SOFTWARE.
*/ */
#include "en.h" #ifndef NET_DIM_H
#define NET_DIM_H
#include <linux/module.h>
struct net_dim_cq_moder {
u16 usec;
u16 pkts;
u8 cq_period_mode;
};
struct net_dim_sample {
ktime_t time;
u32 pkt_ctr;
u32 byte_ctr;
u16 event_ctr;
};
struct net_dim_stats {
int ppms; /* packets per msec */
int bpms; /* bytes per msec */
int epms; /* events per msec */
};
struct net_dim { /* Adaptive Moderation */
u8 state;
struct net_dim_stats prev_stats;
struct net_dim_sample start_sample;
struct work_struct work;
u8 profile_ix;
u8 mode;
u8 tune_state;
u8 steps_right;
u8 steps_left;
u8 tired;
};
enum {
NET_DIM_CQ_PERIOD_MODE_START_FROM_EQE = 0x0,
NET_DIM_CQ_PERIOD_MODE_START_FROM_CQE = 0x1,
NET_DIM_CQ_PERIOD_NUM_MODES
};
/* Adaptive moderation logic */
enum {
NET_DIM_START_MEASURE,
NET_DIM_MEASURE_IN_PROGRESS,
NET_DIM_APPLY_NEW_PROFILE,
};
enum {
NET_DIM_PARKING_ON_TOP,
NET_DIM_PARKING_TIRED,
NET_DIM_GOING_RIGHT,
NET_DIM_GOING_LEFT,
};
enum {
NET_DIM_STATS_WORSE,
NET_DIM_STATS_SAME,
NET_DIM_STATS_BETTER,
};
enum {
NET_DIM_STEPPED,
NET_DIM_TOO_TIRED,
NET_DIM_ON_EDGE,
};
#define NET_DIM_PARAMS_NUM_PROFILES 5 #define NET_DIM_PARAMS_NUM_PROFILES 5
/* Adaptive moderation profiles */ /* Adaptive moderation profiles */
@ -62,7 +129,8 @@ profile[NET_DIM_CQ_PERIOD_NUM_MODES][NET_DIM_PARAMS_NUM_PROFILES] = {
NET_DIM_CQE_PROFILES, NET_DIM_CQE_PROFILES,
}; };
struct net_dim_cq_moder net_dim_get_profile(u8 cq_period_mode, int ix) static inline struct net_dim_cq_moder net_dim_get_profile(u8 cq_period_mode,
int ix)
{ {
struct net_dim_cq_moder cq_moder; struct net_dim_cq_moder cq_moder;
@ -71,7 +139,7 @@ struct net_dim_cq_moder net_dim_get_profile(u8 cq_period_mode, int ix)
return cq_moder; return cq_moder;
} }
struct net_dim_cq_moder net_dim_get_def_profile(u8 rx_cq_period_mode) static inline struct net_dim_cq_moder net_dim_get_def_profile(u8 rx_cq_period_mode)
{ {
int default_profile_ix; int default_profile_ix;
@ -83,7 +151,7 @@ struct net_dim_cq_moder net_dim_get_def_profile(u8 rx_cq_period_mode)
return net_dim_get_profile(rx_cq_period_mode, default_profile_ix); return net_dim_get_profile(rx_cq_period_mode, default_profile_ix);
} }
static bool net_dim_on_top(struct net_dim *dim) static inline bool net_dim_on_top(struct net_dim *dim)
{ {
switch (dim->tune_state) { switch (dim->tune_state) {
case NET_DIM_PARKING_ON_TOP: case NET_DIM_PARKING_ON_TOP:
@ -96,7 +164,7 @@ static bool net_dim_on_top(struct net_dim *dim)
} }
} }
static void net_dim_turn(struct net_dim *dim) static inline void net_dim_turn(struct net_dim *dim)
{ {
switch (dim->tune_state) { switch (dim->tune_state) {
case NET_DIM_PARKING_ON_TOP: case NET_DIM_PARKING_ON_TOP:
@ -113,7 +181,7 @@ static void net_dim_turn(struct net_dim *dim)
} }
} }
static int net_dim_step(struct net_dim *dim) static inline int net_dim_step(struct net_dim *dim)
{ {
if (dim->tired == (NET_DIM_PARAMS_NUM_PROFILES * 2)) if (dim->tired == (NET_DIM_PARAMS_NUM_PROFILES * 2))
return NET_DIM_TOO_TIRED; return NET_DIM_TOO_TIRED;
@ -140,7 +208,7 @@ static int net_dim_step(struct net_dim *dim)
return NET_DIM_STEPPED; return NET_DIM_STEPPED;
} }
static void net_dim_park_on_top(struct net_dim *dim) static inline void net_dim_park_on_top(struct net_dim *dim)
{ {
dim->steps_right = 0; dim->steps_right = 0;
dim->steps_left = 0; dim->steps_left = 0;
@ -148,14 +216,14 @@ static void net_dim_park_on_top(struct net_dim *dim)
dim->tune_state = NET_DIM_PARKING_ON_TOP; dim->tune_state = NET_DIM_PARKING_ON_TOP;
} }
static void net_dim_park_tired(struct net_dim *dim) static inline void net_dim_park_tired(struct net_dim *dim)
{ {
dim->steps_right = 0; dim->steps_right = 0;
dim->steps_left = 0; dim->steps_left = 0;
dim->tune_state = NET_DIM_PARKING_TIRED; dim->tune_state = NET_DIM_PARKING_TIRED;
} }
static void net_dim_exit_parking(struct net_dim *dim) static inline void net_dim_exit_parking(struct net_dim *dim)
{ {
dim->tune_state = dim->profile_ix ? NET_DIM_GOING_LEFT : dim->tune_state = dim->profile_ix ? NET_DIM_GOING_LEFT :
NET_DIM_GOING_RIGHT; NET_DIM_GOING_RIGHT;
@ -165,8 +233,8 @@ static void net_dim_exit_parking(struct net_dim *dim)
#define IS_SIGNIFICANT_DIFF(val, ref) \ #define IS_SIGNIFICANT_DIFF(val, ref) \
(((100 * abs((val) - (ref))) / (ref)) > 10) /* more than 10% difference */ (((100 * abs((val) - (ref))) / (ref)) > 10) /* more than 10% difference */
static int net_dim_stats_compare(struct net_dim_stats *curr, static inline int net_dim_stats_compare(struct net_dim_stats *curr,
struct net_dim_stats *prev) struct net_dim_stats *prev)
{ {
if (!prev->bpms) if (!prev->bpms)
return curr->bpms ? NET_DIM_STATS_BETTER : return curr->bpms ? NET_DIM_STATS_BETTER :
@ -187,8 +255,8 @@ static int net_dim_stats_compare(struct net_dim_stats *curr,
return NET_DIM_STATS_SAME; return NET_DIM_STATS_SAME;
} }
static bool net_dim_decision(struct net_dim_stats *curr_stats, static inline bool net_dim_decision(struct net_dim_stats *curr_stats,
struct net_dim *dim) struct net_dim *dim)
{ {
int prev_state = dim->tune_state; int prev_state = dim->tune_state;
int prev_ix = dim->profile_ix; int prev_ix = dim->profile_ix;
@ -239,10 +307,10 @@ static bool net_dim_decision(struct net_dim_stats *curr_stats,
return dim->profile_ix != prev_ix; return dim->profile_ix != prev_ix;
} }
static void net_dim_sample(u16 event_ctr, static inline void net_dim_sample(u16 event_ctr,
u64 packets, u64 packets,
u64 bytes, u64 bytes,
struct net_dim_sample *s) struct net_dim_sample *s)
{ {
s->time = ktime_get(); s->time = ktime_get();
s->pkt_ctr = packets; s->pkt_ctr = packets;
@ -254,9 +322,9 @@ static void net_dim_sample(u16 event_ctr,
#define BITS_PER_TYPE(type) (sizeof(type) * BITS_PER_BYTE) #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)) #define BIT_GAP(bits, end, start) ((((end) - (start)) + BIT_ULL(bits)) & (BIT_ULL(bits) - 1))
static void net_dim_calc_stats(struct net_dim_sample *start, static inline void net_dim_calc_stats(struct net_dim_sample *start,
struct net_dim_sample *end, struct net_dim_sample *end,
struct net_dim_stats *curr_stats) struct net_dim_stats *curr_stats)
{ {
/* u32 holds up to 71 minutes, should be enough */ /* u32 holds up to 71 minutes, should be enough */
u32 delta_us = ktime_us_delta(end->time, start->time); u32 delta_us = ktime_us_delta(end->time, start->time);
@ -273,10 +341,10 @@ static void net_dim_calc_stats(struct net_dim_sample *start,
delta_us); delta_us);
} }
void net_dim(struct net_dim *dim, static inline void net_dim(struct net_dim *dim,
u16 event_ctr, u16 event_ctr,
u64 packets, u64 packets,
u64 bytes) u64 bytes)
{ {
struct net_dim_sample end_sample; struct net_dim_sample end_sample;
struct net_dim_stats curr_stats; struct net_dim_stats curr_stats;
@ -305,3 +373,5 @@ void net_dim(struct net_dim *dim,
break; break;
} }
} }
#endif /* NET_DIM_H */