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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>
This commit is contained in:
Vladimir Kondratiev 2014-06-16 19:37:22 +03:00 committed by John W. Linville
parent 84bb29b7ab
commit be299858d0
3 changed files with 14 additions and 0 deletions
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11
drivers/net/wireless/ath/wil6210/debugfs.c
View File

@ -851,10 +851,21 @@ static const struct file_operations fops_link = {
/*---------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;
}

2
drivers/net/wireless/ath/wil6210/interrupt.c
View File

@ -208,6 +208,7 @@ static irqreturn_t wil6210_irq_rx(int irq, void *cookie)
/* Rx IRQ will be enabled when NAPI processing finished */
atomic_inc(&wil->isr_count_rx);
return IRQ_HANDLED;
}
@ -246,6 +247,7 @@ static irqreturn_t wil6210_irq_tx(int irq, void *cookie)
/* Tx IRQ will be enabled when NAPI processing finished */
atomic_inc(&wil->isr_count_tx);
return IRQ_HANDLED;
}

1
drivers/net/wireless/ath/wil6210/wil6210.h
View File

@ -412,6 +412,7 @@ struct wil6210_priv {
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;