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aab535d2bb
This reverts the airtime scheduler back from the virtual-time based scheduler
to the deficit round robin scheduler implementation.
This reduces burstiness and improves fairness by improving interaction with AQL.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
(cherry-picked from commit 6d49a25804)
59 lines
1.7 KiB
Diff
59 lines
1.7 KiB
Diff
From: Felix Fietkau <nbd@nbd.name>
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Date: Sat, 25 Jun 2022 21:25:40 +0200
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Subject: [PATCH] mac80211: add debugfs file to display per-phy AQL pending
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airtime
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Now that the global pending airtime is more relevant for airtime fairness,
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it makes sense to make it accessible via debugfs for debugging
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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--- a/net/mac80211/debugfs.c
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+++ b/net/mac80211/debugfs.c
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@@ -201,6 +201,36 @@ static const struct file_operations airt
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.llseek = default_llseek,
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};
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+static ssize_t aql_pending_read(struct file *file,
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+ char __user *user_buf,
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+ size_t count, loff_t *ppos)
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+{
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+ struct ieee80211_local *local = file->private_data;
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+ char buf[400];
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+ int len = 0;
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+
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+ len = scnprintf(buf, sizeof(buf),
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+ "AC AQL pending\n"
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+ "VO %u us\n"
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+ "VI %u us\n"
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+ "BE %u us\n"
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+ "BK %u us\n"
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+ "total %u us\n",
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+ atomic_read(&local->aql_ac_pending_airtime[IEEE80211_AC_VO]),
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+ atomic_read(&local->aql_ac_pending_airtime[IEEE80211_AC_VI]),
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+ atomic_read(&local->aql_ac_pending_airtime[IEEE80211_AC_BE]),
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+ atomic_read(&local->aql_ac_pending_airtime[IEEE80211_AC_BK]),
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+ atomic_read(&local->aql_total_pending_airtime));
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+ return simple_read_from_buffer(user_buf, count, ppos,
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+ buf, len);
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+}
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+
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+static const struct file_operations aql_pending_ops = {
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+ .read = aql_pending_read,
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+ .open = simple_open,
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+ .llseek = default_llseek,
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+};
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+
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static ssize_t aql_txq_limit_read(struct file *file,
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char __user *user_buf,
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size_t count,
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@@ -628,6 +658,7 @@ void debugfs_hw_add(struct ieee80211_loc
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DEBUGFS_ADD(hw_conf);
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DEBUGFS_ADD_MODE(force_tx_status, 0600);
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DEBUGFS_ADD_MODE(aql_enable, 0600);
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+ DEBUGFS_ADD(aql_pending);
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if (local->ops->wake_tx_queue)
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DEBUGFS_ADD_MODE(aqm, 0600);
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