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50 lines
1.7 KiB
Diff
50 lines
1.7 KiB
Diff
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From: Felix Fietkau <nbd@nbd.name>
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Date: Thu, 27 Aug 2020 12:44:36 +0200
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Subject: [PATCH] mac80211: extend AQL aggregation estimation to HE and fix
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unit mismatch
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The unit of the return value of ieee80211_get_rate_duration is nanoseconds, not
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milliseconds. Adjust the duration checks to account for that.
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For higher data rates, allow larger estimated aggregation sizes, and add some
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values for HE as well, which can use much larger aggregates.
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Since small packets with high data rates can now lead to duration values too
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small for info->tx_time_est, return a minimum of 4us.
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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--- a/net/mac80211/airtime.c
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+++ b/net/mac80211/airtime.c
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@@ -668,20 +668,26 @@ u32 ieee80211_calc_expected_tx_airtime(s
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* This will not be very accurate, but much better than simply
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* assuming un-aggregated tx in all cases.
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*/
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- if (duration > 400) /* <= VHT20 MCS2 1S */
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+ if (duration > 400 * 1024) /* <= VHT20 MCS2 1S */
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agg_shift = 1;
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- else if (duration > 250) /* <= VHT20 MCS3 1S or MCS1 2S */
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+ else if (duration > 250 * 1024) /* <= VHT20 MCS3 1S or MCS1 2S */
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agg_shift = 2;
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- else if (duration > 150) /* <= VHT20 MCS5 1S or MCS3 2S */
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+ else if (duration > 150 * 1024) /* <= VHT20 MCS5 1S or MCS2 2S */
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agg_shift = 3;
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- else
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+ else if (duration > 70 * 1024) /* <= VHT20 MCS5 2S */
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agg_shift = 4;
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+ else if (stat.encoding != RX_ENC_HE ||
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+ duration > 20 * 1024) /* <= HE40 MCS6 2S */
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+ agg_shift = 5;
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+ else
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+ agg_shift = 6;
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duration *= len;
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duration /= AVG_PKT_SIZE;
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duration /= 1024;
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+ duration += (overhead >> agg_shift);
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- return duration + (overhead >> agg_shift);
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+ return max_t(u32, duration, 4);
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}
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if (!conf)
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