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| author | Yamin Friedman <yaminf@mellanox.com> | 2018-11-22 09:51:17 +0200 |
|---|---|---|
| committer | Saeed Mahameed <saeedm@mellanox.com> | 2019-06-25 13:46:40 -0700 |
| commit | 398c2b05bbee21cc172dfff017c0351d4d14e04c (patch) | |
| tree | 46dc79312713a53112b23868f22d1cda3c932e9a /lib/dim | |
| parent | 4f75da3666c0c572967729a2401ac650be5581b6 (diff) | |
| download | lwn-398c2b05bbee21cc172dfff017c0351d4d14e04c.tar.gz lwn-398c2b05bbee21cc172dfff017c0351d4d14e04c.zip | |
linux/dim: Add completions count to dim_sample
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>
Diffstat (limited to 'lib/dim')
| -rw-r--r-- | lib/dim/dim.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/dim/dim.c b/lib/dim/dim.c index 17d5236759bd..439d641ec796 100644 --- a/lib/dim/dim.c +++ b/lib/dim/dim.c @@ -62,6 +62,8 @@ void dim_calc_stats(struct dim_sample *start, struct dim_sample *end, 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; @@ -70,5 +72,12 @@ void dim_calc_stats(struct dim_sample *start, struct dim_sample *end, 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 = + (curr_stats->cpms * 100) / curr_stats->epms; + else + curr_stats->cpe_ratio = 0; + } EXPORT_SYMBOL(dim_calc_stats); |