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Message-Id: <20190203135040.28871-7-talgi@mellanox.com>
Date: Sun, 3 Feb 2019 15:50:37 +0200
From: Tal Gilboa <talgi@...lanox.com>
To: David Miller <davem@...emloft.net>
Cc: netdev@...r.kernel.org, Tariq Toukan <tariqt@...lanox.com>,
Tal Gilboa <talgi@...lanox.com>,
Saeed Mahameed <saeedm@...lanox.com>,
Idan Burstein <idanb@...lanox.com>,
Yamin Friedman <yaminf@...lanox.com>,
Max Gurtovoy <maxg@...lanox.com>,
Florian Fainelli <f.fainelli@...il.com>,
Andy Gospodarek <andrew.gospodarek@...adcom.com>
Subject: [RFC/PATCH net-next 6/9] linux/dim: Move implementation to .c files
Moved all logic from dim.h and net_dim.h to dim.c and net_dim.c.
Signed-off-by: Tal Gilboa <talgi@...lanox.com>
---
MAINTAINERS | 2 +
include/linux/dim.h | 86 +++---------------
include/linux/net_dim.h | 182 ++-----------------------------------
lib/Kconfig | 7 ++
lib/Makefile | 1 +
lib/dim/Makefile | 9 ++
lib/dim/dim.c | 83 +++++++++++++++++
lib/dim/net_dim.c | 193 ++++++++++++++++++++++++++++++++++++++++
8 files changed, 312 insertions(+), 251 deletions(-)
create mode 100644 lib/dim/Makefile
create mode 100644 lib/dim/dim.c
create mode 100644 lib/dim/net_dim.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 019a2bcfbd09..6ae949be8b83 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -5337,6 +5337,8 @@ DYNAMIC INTERRUPT MODERATION
M: Tal Gilboa <talgi@...lanox.com>
S: Maintained
F: include/linux/net_dim.h
+F: include/linux/dim.h
+F: lib/dim/
DZ DECSTATION DZ11 SERIAL DRIVER
M: "Maciej W. Rozycki" <macro@...ux-mips.org>
diff --git a/include/linux/dim.h b/include/linux/dim.h
index 8d9f8279ebee..88a74cd83d95 100644
--- a/include/linux/dim.h
+++ b/include/linux/dim.h
@@ -105,79 +105,17 @@ enum {
DIM_ON_EDGE,
};
-static inline 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);
- }
-}
-
-static inline 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;
- }
-}
-
-static inline 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;
-}
-
-static inline void dim_park_tired(struct dim *dim)
-{
- dim->steps_right = 0;
- dim->steps_left = 0;
- dim->tune_state = DIM_PARKING_TIRED;
-}
-
-static inline void dim_create_sample(u16 event_ctr,
- u64 packets,
- u64 bytes,
- struct dim_sample *s)
-{
- s->time = ktime_get();
- s->pkt_ctr = packets;
- s->byte_ctr = bytes;
- s->event_ctr = event_ctr;
-}
-
-static inline 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);
-
- 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);
-}
+bool dim_on_top(struct dim *dim);
+
+void dim_turn(struct dim *dim);
+
+void dim_park_on_top(struct dim *dim);
+
+void dim_park_tired(struct dim *dim);
+
+void dim_create_sample(u16 event_ctr, u64 packets, u64 bytes, struct dim_sample *s);
+
+void dim_calc_stats(struct dim_sample *start, struct dim_sample *end,
+ struct dim_stats *curr_stats);
#endif /* DIM_H */
diff --git a/include/linux/net_dim.h b/include/linux/net_dim.h
index e9363c372b68..debf548cfb33 100644
--- a/include/linux/net_dim.h
+++ b/include/linux/net_dim.h
@@ -89,186 +89,14 @@ tx_profile[DIM_CQ_PERIOD_NUM_MODES][NET_DIM_PARAMS_NUM_PROFILES] = {
NET_DIM_TX_CQE_PROFILES,
};
-static inline struct dim_cq_moder
-net_dim_get_rx_moderation(u8 cq_period_mode, int ix)
-{
- struct dim_cq_moder cq_moder = rx_profile[cq_period_mode][ix];
+struct dim_cq_moder net_dim_get_rx_moderation(u8 cq_period_mode, int ix);
- cq_moder.cq_period_mode = cq_period_mode;
- return cq_moder;
-}
-
-static inline struct dim_cq_moder
-net_dim_get_def_rx_moderation(u8 cq_period_mode)
-{
- u8 profile_ix = cq_period_mode == DIM_CQ_PERIOD_MODE_START_FROM_CQE ?
- NET_DIM_DEF_PROFILE_CQE : NET_DIM_DEF_PROFILE_EQE;
-
- return net_dim_get_rx_moderation(cq_period_mode, profile_ix);
-}
-
-static inline struct dim_cq_moder
-net_dim_get_tx_moderation(u8 cq_period_mode, int ix)
-{
- struct dim_cq_moder cq_moder = tx_profile[cq_period_mode][ix];
-
- cq_moder.cq_period_mode = cq_period_mode;
- return cq_moder;
-}
-
-static inline struct dim_cq_moder
-net_dim_get_def_tx_moderation(u8 cq_period_mode)
-{
- u8 profile_ix = cq_period_mode == DIM_CQ_PERIOD_MODE_START_FROM_CQE ?
- NET_DIM_DEF_PROFILE_CQE : NET_DIM_DEF_PROFILE_EQE;
-
- return net_dim_get_tx_moderation(cq_period_mode, profile_ix);
-}
-
-static inline int net_dim_step(struct dim *dim)
-{
- if (dim->tired == (NET_DIM_PARAMS_NUM_PROFILES * 2))
- return DIM_TOO_TIRED;
-
- switch (dim->tune_state) {
- case DIM_PARKING_ON_TOP:
- case DIM_PARKING_TIRED:
- break;
- case DIM_GOING_RIGHT:
- if (dim->profile_ix == (NET_DIM_PARAMS_NUM_PROFILES - 1))
- return DIM_ON_EDGE;
- dim->profile_ix++;
- dim->steps_right++;
- break;
- case DIM_GOING_LEFT:
- if (dim->profile_ix == 0)
- return DIM_ON_EDGE;
- dim->profile_ix--;
- dim->steps_left++;
- break;
- }
-
- dim->tired++;
- return DIM_STEPPED;
-}
-
-static inline void net_dim_exit_parking(struct dim *dim)
-{
- dim->tune_state = dim->profile_ix ? DIM_GOING_LEFT :
- DIM_GOING_RIGHT;
- net_dim_step(dim);
-}
-
-static inline int net_dim_stats_compare(struct dim_stats *curr,
- struct dim_stats *prev)
-{
- if (!prev->bpms)
- return curr->bpms ? DIM_STATS_BETTER :
- DIM_STATS_SAME;
+struct dim_cq_moder net_dim_get_def_rx_moderation(u8 cq_period_mode);
- if (IS_SIGNIFICANT_DIFF(curr->bpms, prev->bpms))
- return (curr->bpms > prev->bpms) ? DIM_STATS_BETTER :
- DIM_STATS_WORSE;
+struct dim_cq_moder net_dim_get_tx_moderation(u8 cq_period_mode, int ix);
- if (!prev->ppms)
- return curr->ppms ? DIM_STATS_BETTER :
- DIM_STATS_SAME;
+struct dim_cq_moder net_dim_get_def_tx_moderation(u8 cq_period_mode);
- if (IS_SIGNIFICANT_DIFF(curr->ppms, prev->ppms))
- return (curr->ppms > prev->ppms) ? DIM_STATS_BETTER :
- DIM_STATS_WORSE;
-
- if (!prev->epms)
- return DIM_STATS_SAME;
-
- if (IS_SIGNIFICANT_DIFF(curr->epms, prev->epms))
- return (curr->epms < prev->epms) ? DIM_STATS_BETTER :
- DIM_STATS_WORSE;
-
- return DIM_STATS_SAME;
-}
-
-static inline bool net_dim_decision(struct dim_stats *curr_stats,
- struct dim *dim)
-{
- int prev_state = dim->tune_state;
- int prev_ix = dim->profile_ix;
- int stats_res;
- int step_res;
-
- switch (dim->tune_state) {
- case DIM_PARKING_ON_TOP:
- stats_res = net_dim_stats_compare(curr_stats, &dim->prev_stats);
- if (stats_res != DIM_STATS_SAME)
- net_dim_exit_parking(dim);
- break;
-
- case DIM_PARKING_TIRED:
- dim->tired--;
- if (!dim->tired)
- net_dim_exit_parking(dim);
- break;
-
- case DIM_GOING_RIGHT:
- case DIM_GOING_LEFT:
- stats_res = net_dim_stats_compare(curr_stats, &dim->prev_stats);
- if (stats_res != DIM_STATS_BETTER)
- dim_turn(dim);
-
- if (dim_on_top(dim)) {
- dim_park_on_top(dim);
- break;
- }
-
- step_res = net_dim_step(dim);
- switch (step_res) {
- case DIM_ON_EDGE:
- dim_park_on_top(dim);
- break;
- case DIM_TOO_TIRED:
- dim_park_tired(dim);
- break;
- }
-
- break;
- }
-
- if ((prev_state != DIM_PARKING_ON_TOP) ||
- (dim->tune_state != DIM_PARKING_ON_TOP))
- dim->prev_stats = *curr_stats;
-
- return dim->profile_ix != prev_ix;
-}
-
-static inline void net_dim(struct dim *dim,
- struct dim_sample end_sample)
-{
- struct dim_stats curr_stats;
- u16 nevents;
-
- switch (dim->state) {
- case DIM_MEASURE_IN_PROGRESS:
- nevents = BIT_GAP(BITS_PER_TYPE(u16),
- end_sample.event_ctr,
- dim->start_sample.event_ctr);
- if (nevents < DIM_NEVENTS)
- break;
- dim_calc_stats(&dim->start_sample, &end_sample,
- &curr_stats);
- if (net_dim_decision(&curr_stats, dim)) {
- dim->state = DIM_APPLY_NEW_PROFILE;
- schedule_work(&dim->work);
- break;
- }
- /* fall through */
- case DIM_START_MEASURE:
- dim_create_sample(end_sample.event_ctr, end_sample.pkt_ctr,
- end_sample.byte_ctr, &dim->start_sample);
- dim->state = DIM_MEASURE_IN_PROGRESS;
- break;
- case DIM_APPLY_NEW_PROFILE:
- break;
- }
-}
+void net_dim(struct dim *dim, struct dim_sample end_sample);
#endif /* NET_DIM_H */
diff --git a/lib/Kconfig b/lib/Kconfig
index a9e56539bd11..153465c65624 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -551,6 +551,13 @@ config SIGNATURE
Digital signature verification. Currently only RSA is supported.
Implementation is done using GnuPG MPI library
+config DIMLIB
+ bool "DIM library"
+ default y
+ help
+ Dynamic Interrupt Moderation library.
+ It is used to implement DIM logic.
+
#
# libfdt files, only selected if needed.
#
diff --git a/lib/Makefile b/lib/Makefile
index e1b59da71418..0f2155eb9a85 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -185,6 +185,7 @@ obj-$(CONFIG_GLOB) += glob.o
obj-$(CONFIG_GLOB_SELFTEST) += globtest.o
obj-$(CONFIG_MPILIB) += mpi/
+obj-$(CONFIG_DIMLIB) += dim/
obj-$(CONFIG_SIGNATURE) += digsig.o
lib-$(CONFIG_CLZ_TAB) += clz_tab.o
diff --git a/lib/dim/Makefile b/lib/dim/Makefile
new file mode 100644
index 000000000000..160afe288df0
--- /dev/null
+++ b/lib/dim/Makefile
@@ -0,0 +1,9 @@
+#
+# DIM Dynamic Interrupt Moderation library
+#
+
+obj-$(CONFIG_DIMLIB) = net_dim.o
+
+net_dim-y = \
+ dim.o \
+ net_dim.o
diff --git a/lib/dim/dim.c b/lib/dim/dim.c
new file mode 100644
index 000000000000..93e1ddd701b0
--- /dev/null
+++ b/lib/dim/dim.c
@@ -0,0 +1,83 @@
+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
+/*
+ * Copyright (c) 2018, 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_create_sample(u16 event_ctr, u64 packets, u64 bytes, struct dim_sample *s)
+{
+ s->time = ktime_get();
+ s->pkt_ctr = packets;
+ s->byte_ctr = bytes;
+ s->event_ctr = event_ctr;
+}
+EXPORT_SYMBOL(dim_create_sample);
+
+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);
+
+ 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);
+}
+EXPORT_SYMBOL(dim_calc_stats);
diff --git a/lib/dim/net_dim.c b/lib/dim/net_dim.c
new file mode 100644
index 000000000000..cf95cd20cf02
--- /dev/null
+++ b/lib/dim/net_dim.c
@@ -0,0 +1,193 @@
+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
+/*
+ * Copyright (c) 2018, Mellanox Technologies inc. All rights reserved.
+ */
+
+#include <linux/net_dim.h>
+#include <linux/dim.h>
+
+struct dim_cq_moder
+net_dim_get_rx_moderation(u8 cq_period_mode, int ix)
+{
+ struct dim_cq_moder cq_moder = rx_profile[cq_period_mode][ix];
+
+ cq_moder.cq_period_mode = cq_period_mode;
+ return cq_moder;
+}
+EXPORT_SYMBOL(net_dim_get_rx_moderation);
+
+struct dim_cq_moder
+net_dim_get_def_rx_moderation(u8 cq_period_mode)
+{
+ u8 profile_ix = cq_period_mode == DIM_CQ_PERIOD_MODE_START_FROM_CQE ?
+ NET_DIM_DEF_PROFILE_CQE : NET_DIM_DEF_PROFILE_EQE;
+
+ return net_dim_get_rx_moderation(cq_period_mode, profile_ix);
+}
+EXPORT_SYMBOL(net_dim_get_def_rx_moderation);
+
+struct dim_cq_moder
+net_dim_get_tx_moderation(u8 cq_period_mode, int ix)
+{
+ struct dim_cq_moder cq_moder = tx_profile[cq_period_mode][ix];
+
+ cq_moder.cq_period_mode = cq_period_mode;
+ return cq_moder;
+}
+EXPORT_SYMBOL(net_dim_get_tx_moderation);
+
+struct dim_cq_moder
+net_dim_get_def_tx_moderation(u8 cq_period_mode)
+{
+ u8 profile_ix = cq_period_mode == DIM_CQ_PERIOD_MODE_START_FROM_CQE ?
+ NET_DIM_DEF_PROFILE_CQE : NET_DIM_DEF_PROFILE_EQE;
+
+ return net_dim_get_tx_moderation(cq_period_mode, profile_ix);
+}
+EXPORT_SYMBOL(net_dim_get_def_tx_moderation);
+
+static inline int net_dim_step(struct dim *dim)
+{
+ if (dim->tired == (NET_DIM_PARAMS_NUM_PROFILES * 2))
+ return DIM_TOO_TIRED;
+
+ switch (dim->tune_state) {
+ case DIM_PARKING_ON_TOP:
+ case DIM_PARKING_TIRED:
+ break;
+ case DIM_GOING_RIGHT:
+ if (dim->profile_ix == (NET_DIM_PARAMS_NUM_PROFILES - 1))
+ return DIM_ON_EDGE;
+ dim->profile_ix++;
+ dim->steps_right++;
+ break;
+ case DIM_GOING_LEFT:
+ if (dim->profile_ix == 0)
+ return DIM_ON_EDGE;
+ dim->profile_ix--;
+ dim->steps_left++;
+ break;
+ }
+
+ dim->tired++;
+ return DIM_STEPPED;
+}
+
+static inline void net_dim_exit_parking(struct dim *dim)
+{
+ dim->tune_state = dim->profile_ix ? DIM_GOING_LEFT :
+ DIM_GOING_RIGHT;
+ net_dim_step(dim);
+}
+
+static inline int net_dim_stats_compare(struct dim_stats *curr,
+ struct dim_stats *prev)
+{
+ if (!prev->bpms)
+ return curr->bpms ? DIM_STATS_BETTER :
+ DIM_STATS_SAME;
+
+ if (IS_SIGNIFICANT_DIFF(curr->bpms, prev->bpms))
+ return (curr->bpms > prev->bpms) ? DIM_STATS_BETTER :
+ DIM_STATS_WORSE;
+
+ if (!prev->ppms)
+ return curr->ppms ? DIM_STATS_BETTER :
+ DIM_STATS_SAME;
+
+ if (IS_SIGNIFICANT_DIFF(curr->ppms, prev->ppms))
+ return (curr->ppms > prev->ppms) ? DIM_STATS_BETTER :
+ DIM_STATS_WORSE;
+
+ if (!prev->epms)
+ return DIM_STATS_SAME;
+
+ if (IS_SIGNIFICANT_DIFF(curr->epms, prev->epms))
+ return (curr->epms < prev->epms) ? DIM_STATS_BETTER :
+ DIM_STATS_WORSE;
+
+ return DIM_STATS_SAME;
+}
+
+static inline bool net_dim_decision(struct dim_stats *curr_stats,
+ struct dim *dim)
+{
+ int prev_state = dim->tune_state;
+ int prev_ix = dim->profile_ix;
+ int stats_res;
+ int step_res;
+
+ switch (dim->tune_state) {
+ case DIM_PARKING_ON_TOP:
+ stats_res = net_dim_stats_compare(curr_stats, &dim->prev_stats);
+ if (stats_res != DIM_STATS_SAME)
+ net_dim_exit_parking(dim);
+ break;
+
+ case DIM_PARKING_TIRED:
+ dim->tired--;
+ if (!dim->tired)
+ net_dim_exit_parking(dim);
+ break;
+
+ case DIM_GOING_RIGHT:
+ case DIM_GOING_LEFT:
+ stats_res = net_dim_stats_compare(curr_stats, &dim->prev_stats);
+ if (stats_res != DIM_STATS_BETTER)
+ dim_turn(dim);
+
+ if (dim_on_top(dim)) {
+ dim_park_on_top(dim);
+ break;
+ }
+
+ step_res = net_dim_step(dim);
+ switch (step_res) {
+ case DIM_ON_EDGE:
+ dim_park_on_top(dim);
+ break;
+ case DIM_TOO_TIRED:
+ dim_park_tired(dim);
+ break;
+ }
+
+ break;
+ }
+
+ if ((prev_state != DIM_PARKING_ON_TOP) ||
+ (dim->tune_state != DIM_PARKING_ON_TOP))
+ dim->prev_stats = *curr_stats;
+
+ return dim->profile_ix != prev_ix;
+}
+
+void net_dim(struct dim *dim, struct dim_sample end_sample)
+{
+ struct dim_stats curr_stats;
+ u16 nevents;
+
+ switch (dim->state) {
+ case DIM_MEASURE_IN_PROGRESS:
+ nevents = BIT_GAP(BITS_PER_TYPE(u16),
+ end_sample.event_ctr,
+ dim->start_sample.event_ctr);
+ if (nevents < DIM_NEVENTS)
+ break;
+ dim_calc_stats(&dim->start_sample, &end_sample,
+ &curr_stats);
+ if (net_dim_decision(&curr_stats, dim)) {
+ dim->state = DIM_APPLY_NEW_PROFILE;
+ schedule_work(&dim->work);
+ break;
+ }
+ /* fall through */
+ case DIM_START_MEASURE:
+ dim_create_sample(end_sample.event_ctr, end_sample.pkt_ctr,
+ end_sample.byte_ctr, &dim->start_sample);
+ dim->state = DIM_MEASURE_IN_PROGRESS;
+ break;
+ case DIM_APPLY_NEW_PROFILE:
+ break;
+ }
+}
+EXPORT_SYMBOL(net_dim);
--
2.19.1
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