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  1. 11 Jun, 2017 5 commits
    • Tal Gilboa's avatar
      net/mlx5e: Fix wrong indications in DIM due to counter wraparound · 53acd76c
      Tal Gilboa authored 
      DIM (Dynamically-tuned Interrupt Moderation) is a mechanism designed for
changing the channel interrupt moderation values in order to reduce CPU
overhead for all traffic types.
Each iteration of the algorithm, DIM calculates the difference in
throughput, packet rate and interrupt rate from last iteration in order
to make a decision. DIM relies on counters for each metric. When these
counters get to their type's max value they wraparound. In this case
the delta between 'end' and 'start' samples is negative and when
translated to unsigned integers - very high. This results in a false
indication to the algorithm and might result in a wrong decision.

The fix calculates the 'distance' between 'end' and 'start' samples in a
cyclic way around the relevant type's max value. It can also be viewed as
an absolute value around the type's max value instead of around 0.

Testing show higher stability in DIM profile selection and no wraparound
issues.

Fixes: cb3c7fd4 ("net/mlx5e: Support adaptive RX coalescing")
Signed-off-by: default avatarTal Gilboa <talgi@mellanox.com>
Signed-off-by: default avatarSaeed Mahameed <saeedm@mellanox.com>
      53acd76c
    • Tal Gilboa's avatar
      net/mlx5e: Added BW check for DIM decision mechanism · c3164d2f
      Tal Gilboa authored 
      DIM (Dynamically-tuned Interrupt Moderation) is a mechanism designed for
changing the channel interrupt moderation values in order to reduce CPU
overhead for all traffic types.
Until now only interrupt and packet rate were sampled.
We found a scenario on which we get a false indication since a change in
DIM caused more aggregation and reduced packet rate while increasing BW.

We now regard a change as succesfull iff:
current_BW > (prev_BW + threshold) or
current_BW ~= prev_BW and current_PR > (prev_PR + threshold) or
current_BW ~= prev_BW and current_PR ~= prev_PR and
    current_IR < (prev_IR - threshold)
Where BW = Bandwidth, PR = Packet rate and IR = Interrupt rate

Improvements (ConnectX-4Lx 25GbE, single RX queue, LRO off)
    --------------------------------------------------
    packet size | before[Mb/s] | after[Mb/s] | gain  |
    2B          | 343.4        | 359.4       |  4.5% |
    16B         | 2739.7       | 2814.8      |  2.7% |
    64B         | 9739         | 10185.3     |  4.5% |

Fixes: cb3c7fd4 ("net/mlx5e: Support adaptive RX coalescing")
Signed-off-by: default avatarTal Gilboa <talgi@mellanox.com>
Signed-off-by: default avatarSaeed Mahameed <saeedm@mellanox.com>
      c3164d2f
    • Huy Nguyen's avatar
      net/mlx5: Remove several module events out of ethtool stats · f729860a
      Huy Nguyen authored 
      Remove the following module event counters out of ethtool stats. The
reason for removing these event counters is that these events do not
occur without techinician's intervention.
  module_pwr_budget_exd
  module_long_range
  module_no_eeprom
  module_enforce_part
  module_unknown_id
  module_unknown_status
  module_plug

Fixes: bedb7c90 ("net/mlx5e: Add port module event counters to ethtool stats")
Signed-off-by: default avatarHuy Nguyen <huyn@mellanox.com>
Reviewed by: Gal Pressman <galp@mellanox.com>
Signed-off-by: default avatarSaeed Mahameed <saeedm@mellanox.com>
      f729860a
    • Mohamad Haj Yahia's avatar
      net/mlx5: Continue health polling until it is explicitly stopped · 3fece5d6
      Mohamad Haj Yahia authored 
      The issue is that when we get an assert we will stop polling the health
and thus we cant enter error state when we have a real health issue.

Fixes: fd76ee4d ('net/mlx5_core: Fix internal error detection conditions')
Signed-off-by: default avatarMohamad Haj Yahia <mohamad@mellanox.com>
Reviewed-by: default avatarDaniel Jurgens <danielj@mellanox.com>
Signed-off-by: default avatarSaeed Mahameed <saeedm@mellanox.com>
      3fece5d6
    • Mohamad Haj Yahia's avatar
      net/mlx5: Fix create vport flow table flow · 57f35c93
      Mohamad Haj Yahia authored 
      Send vport number to the create flow table inner method instead of
ignoring the vport argument and sending always 0.

Fixes: b3ba5149 ('net/mlx5: Refactor create flow table method to accept underlay QP')
Signed-off-by: default avatarMohamad Haj Yahia <mohamad@mellanox.com>
Signed-off-by: default avatarSaeed Mahameed <saeedm@mellanox.com>
      57f35c93
  3. 10 Jun, 2017 13 commits
  5. 09 Jun, 2017 14 commits
  7. 08 Jun, 2017 8 commits
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