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b43: Add optional verbose runtime statistics 

This adds support for verbose runtime statistics.
It defaults to off and must be enabled in debugfs, if desired.
The first measurement may be incorrect, because statistics are not cleared
after they got enabled through debugfs.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Michael Buesch 2009-09-12 00:48:03 +02:00 committed by John W. Linville
parent 176e9f6a4c
commit 990b86f4f9
5 changed files with 43 additions and 0 deletions
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4
drivers/net/wireless/b43/b43.h
View File

@ -817,6 +817,10 @@ struct b43_wldev {
/* Debugging stuff follows. */
#ifdef CONFIG_B43_DEBUG
struct b43_dfsentry *dfsentry;
unsigned int irq_count;
unsigned int irq_bit_count[32];
unsigned int tx_count;
unsigned int rx_count;
#endif
};

1
drivers/net/wireless/b43/debugfs.c
View File

@ -689,6 +689,7 @@ static void b43_add_dynamic_debug(struct b43_wldev *dev)
add_dyn_dbg("debug_lo", B43_DBG_LO, 0);
add_dyn_dbg("debug_firmware", B43_DBG_FIRMWARE, 0);
add_dyn_dbg("debug_keys", B43_DBG_KEYS, 0);
add_dyn_dbg("debug_verbose_stats", B43_DBG_VERBOSESTATS, 0);
#undef add_dyn_dbg
}

1
drivers/net/wireless/b43/debugfs.h
View File

@ -13,6 +13,7 @@ enum b43_dyndbg { /* Dynamic debugging features */
B43_DBG_LO,
B43_DBG_FIRMWARE,
B43_DBG_KEYS,
B43_DBG_VERBOSESTATS,
__B43_NR_DYNDBG,
};

34
drivers/net/wireless/b43/main.c
View File

@ -1830,6 +1830,16 @@ static void b43_do_interrupt_thread(struct b43_wldev *dev)
/* Re-enable interrupts on the device by restoring the current interrupt mask. */
b43_write32(dev, B43_MMIO_GEN_IRQ_MASK, dev->irq_mask);
#if B43_DEBUG
if (b43_debug(dev, B43_DBG_VERBOSESTATS)) {
dev->irq_count++;
for (i = 0; i < ARRAY_SIZE(dev->irq_bit_count); i++) {
if (reason & (1 << i))
dev->irq_bit_count[i]++;
}
}
#endif
}
/* Interrupt thread handler. Handles device interrupts in thread context. */
@ -2893,6 +2903,27 @@ static void b43_periodic_every15sec(struct b43_wldev *dev)
atomic_set(&phy->txerr_cnt, B43_PHY_TX_BADNESS_LIMIT);
wmb();
#if B43_DEBUG
if (b43_debug(dev, B43_DBG_VERBOSESTATS)) {
unsigned int i;
b43dbg(dev->wl, "Stats: %7u IRQs/sec, %7u TX/sec, %7u RX/sec\n",
dev->irq_count / 15,
dev->tx_count / 15,
dev->rx_count / 15);
dev->irq_count = 0;
dev->tx_count = 0;
dev->rx_count = 0;
for (i = 0; i < ARRAY_SIZE(dev->irq_bit_count); i++) {
if (dev->irq_bit_count[i]) {
b43dbg(dev->wl, "Stats: %7u IRQ-%02u/sec (0x%08X)\n",
dev->irq_bit_count[i] / 15, i, (1 << i));
dev->irq_bit_count[i] = 0;
}
}
}
#endif
}
static void do_periodic_work(struct b43_wldev *dev)
@ -3092,6 +3123,9 @@ static void b43_tx_work(struct work_struct *work)
dev_kfree_skb(skb); /* Drop it */
}
#if B43_DEBUG
dev->tx_count++;
#endif
mutex_unlock(&wl->mutex);
}

3
drivers/net/wireless/b43/xmit.c
View File

@ -692,6 +692,9 @@ void b43_rx(struct b43_wldev *dev, struct sk_buff *skb, const void *_rxhdr)
memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
ieee80211_rx(dev->wl->hw, skb);
#if B43_DEBUG
dev->rx_count++;
#endif
return;
drop:
b43dbg(dev->wl, "RX: Packet dropped\n");