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| author | Eyal Shapira <eyal@wizery.com> | 2014-12-28 22:12:38 +0200 |
|---|---|---|
| committer | Emmanuel Grumbach <emmanuel.grumbach@intel.com> | 2015-01-22 17:53:53 +0200 |
| commit | bd9993182a5bc70e9f11506ceb9ae4765e39b08c (patch) | |
| tree | b9f742cf84d5d3a40552d41713aa02a5759b2756 /drivers/net/wireless/iwlwifi/mvm/rs.c | |
| parent | 9ce578a5585c31d32325d89d2d168b93e496b4ed (diff) | |
| download | linux-bd9993182a5bc70e9f11506ceb9ae4765e39b08c.tar.bz2 | |
iwlwifi: mvm: rs: repeat initial legacy rates in LQ table
Repeating the legacy rates avoids degrading quickly to
lower rates due to collisions which is common when doing
TCP Tx traffic in legacy.
This slightly improves TCP Tx throughput while working
in legacy in different scenarios.
Signed-off-by: Eyal Shapira <eyalx.shapira@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Diffstat (limited to 'drivers/net/wireless/iwlwifi/mvm/rs.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/mvm/rs.c | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/drivers/net/wireless/iwlwifi/mvm/rs.c b/drivers/net/wireless/iwlwifi/mvm/rs.c index 7ba6e5dbbbd0..474722403556 100644 --- a/drivers/net/wireless/iwlwifi/mvm/rs.c +++ b/drivers/net/wireless/iwlwifi/mvm/rs.c @@ -2862,12 +2862,13 @@ static void rs_fill_rates_for_column(struct iwl_mvm *mvm, int index = *rs_table_index; for (i = 0; i < num_rates && index < end; i++) { - ucode_rate = cpu_to_le32(ucode_rate_from_rs_rate(mvm, rate)); - for (j = 0; j < num_retries && index < end; j++, index++) + for (j = 0; j < num_retries && index < end; j++, index++) { + ucode_rate = cpu_to_le32(ucode_rate_from_rs_rate(mvm, + rate)); rs_table[index] = ucode_rate; - - if (toggle_ant) - rs_toggle_antenna(valid_tx_ant, rate); + if (toggle_ant) + rs_toggle_antenna(valid_tx_ant, rate); + } prev_rate_idx = rate->index; bottom_reached = rs_get_lower_rate_in_column(lq_sta, rate); @@ -2875,7 +2876,7 @@ static void rs_fill_rates_for_column(struct iwl_mvm *mvm, break; } - if (!bottom_reached) + if (!bottom_reached && !is_legacy(rate)) rate->index = prev_rate_idx; *rs_table_index = index; @@ -2925,7 +2926,7 @@ static void rs_build_rates_table(struct iwl_mvm *mvm, num_retries = IWL_MVM_RS_HT_VHT_RETRIES_PER_RATE; } else { num_rates = IWL_MVM_RS_INITIAL_LEGACY_NUM_RATES; - num_retries = IWL_MVM_RS_LEGACY_RETRIES_PER_RATE; + num_retries = IWL_MVM_RS_INITIAL_LEGACY_RETRIES; toggle_ant = true; } @@ -2941,7 +2942,7 @@ static void rs_build_rates_table(struct iwl_mvm *mvm, lq_cmd->mimo_delim = index; } else if (is_legacy(&rate)) { num_rates = IWL_MVM_RS_SECONDARY_LEGACY_NUM_RATES; - num_retries = IWL_MVM_RS_LEGACY_RETRIES_PER_RATE; + num_retries = IWL_MVM_RS_SECONDARY_LEGACY_RETRIES; } else { WARN_ON_ONCE(1); } @@ -2955,7 +2956,7 @@ static void rs_build_rates_table(struct iwl_mvm *mvm, rs_get_lower_rate_down_column(lq_sta, &rate); num_rates = IWL_MVM_RS_SECONDARY_LEGACY_NUM_RATES; - num_retries = IWL_MVM_RS_LEGACY_RETRIES_PER_RATE; + num_retries = IWL_MVM_RS_SECONDARY_LEGACY_RETRIES; rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index, num_rates, num_retries, valid_tx_ant, |