wil6210: interrupt statistics
Track number of interrupts and Tx/Rx packets;
expose through debugfs 'info'. Reset upon read.
Used to analyse effectivness of interrupt coalescing and NAPI.
Read twice with some interval like
cat info > /dev/null; sleep 1; cat info
Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/wil6210/debugfs.c b/drivers/net/wireless/ath/wil6210/debugfs.c
index 8bf00ac..94ac69a 100644
--- a/drivers/net/wireless/ath/wil6210/debugfs.c
+++ b/drivers/net/wireless/ath/wil6210/debugfs.c
@@ -851,10 +851,21 @@
/*---------info------------*/
static int wil_info_debugfs_show(struct seq_file *s, void *data)
{
+ struct wil6210_priv *wil = s->private;
+ struct net_device *ndev = wil_to_ndev(wil);
int is_ac = power_supply_is_system_supplied();
+ int rx = atomic_xchg(&wil->isr_count_rx, 0);
+ int tx = atomic_xchg(&wil->isr_count_tx, 0);
+ static ulong rxf_old, txf_old;
+ ulong rxf = ndev->stats.rx_packets;
+ ulong txf = ndev->stats.tx_packets;
/* >0 : AC; 0 : battery; <0 : error */
seq_printf(s, "AC powered : %d\n", is_ac);
+ seq_printf(s, "Rx irqs:packets : %8d : %8ld\n", rx, rxf - rxf_old);
+ seq_printf(s, "Tx irqs:packets : %8d : %8ld\n", tx, txf - txf_old);
+ rxf_old = rxf;
+ txf_old = txf;
return 0;
}
diff --git a/drivers/net/wireless/ath/wil6210/interrupt.c b/drivers/net/wireless/ath/wil6210/interrupt.c
index e4aba53..67f1002 100644
--- a/drivers/net/wireless/ath/wil6210/interrupt.c
+++ b/drivers/net/wireless/ath/wil6210/interrupt.c
@@ -208,6 +208,7 @@
/* Rx IRQ will be enabled when NAPI processing finished */
+ atomic_inc(&wil->isr_count_rx);
return IRQ_HANDLED;
}
@@ -246,6 +247,7 @@
/* Tx IRQ will be enabled when NAPI processing finished */
+ atomic_inc(&wil->isr_count_tx);
return IRQ_HANDLED;
}
diff --git a/drivers/net/wireless/ath/wil6210/wil6210.h b/drivers/net/wireless/ath/wil6210/wil6210.h
index fd6ff09..4249066 100644
--- a/drivers/net/wireless/ath/wil6210/wil6210.h
+++ b/drivers/net/wireless/ath/wil6210/wil6210.h
@@ -412,6 +412,7 @@
struct mutex mutex; /* for wil6210_priv access in wil_{up|down} */
/* statistics */
struct wil6210_stats stats;
+ atomic_t isr_count_rx, isr_count_tx;
/* debugfs */
struct dentry *debug;
struct debugfs_blob_wrapper fw_code_blob;