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linux/dim: Add completions count to dim_sample

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Added a measurement of completions per/msec to allow for completion based
dim algorithms.

In order to use dynamic interrupt moderation with RDMA we need to have a
different measurment than packets per second. This change is meant to
prepare for adding a new DIM method.

All drivers that use net_dim and thus do not need a completion count will
have the completions set to 0.

Signed-off-by: Yamin Friedman <yaminf@mellanox.com>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Yamin Friedman
2018-11-22 09:51:17 +02:00
committed by Saeed Mahameed
parent 4f75da3666
commit 398c2b05bb
2 changed files with 34 additions and 3 deletions
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28
include/linux/dim.h
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@@ -37,6 +37,7 @@
struct dim_cq_moder {
u16 usec;
u16 pkts;
u16 comps;
u8 cq_period_mode;
};
@@ -54,6 +55,7 @@ struct dim_sample {
u32 pkt_ctr;
u32 byte_ctr;
u16 event_ctr;
u32 comp_ctr;
};
/**
@@ -65,9 +67,11 @@ struct dim_sample {
* @epms: Events per msec
*/
struct dim_stats {
int ppms;
int bpms;
int epms;
int ppms; /* packets per msec */
int bpms; /* bytes per msec */
int epms; /* events per msec */
int cpms; /* completions per msec */
int cpe_ratio; /* ratio of completions to events */
};
/**
@@ -89,6 +93,7 @@ struct dim {
u8 state;
struct dim_stats prev_stats;
struct dim_sample start_sample;
struct dim_sample measuring_sample;
struct work_struct work;
u8 profile_ix;
u8 mode;
@@ -246,6 +251,23 @@ dim_update_sample(u16 event_ctr, u64 packets, u64 bytes, struct dim_sample *s)
s->event_ctr = event_ctr;
}
/**
* dim_update_sample_with_comps - set a sample's fields with given
* values including the completion parameter
* @event_ctr: number of events to set
* @packets: number of packets to set
* @bytes: number of bytes to set
* @comps: number of completions to set
* @s: DIM sample
*/
static inline void
dim_update_sample_with_comps(u16 event_ctr, u64 packets, u64 bytes, u64 comps,
struct dim_sample *s)
{
dim_update_sample(event_ctr, packets, bytes, s);
s->comp_ctr = comps;
}
/* Net DIM */
/*