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ixgbevf: provide 64 bit statistics

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Compute statistics per ring using 64 bits, and provide
network device stats in 64 bits.

It should make this driver multiqueue operations faster (no more cache
line ping pongs on netdev->stats structure)

Use u64_stats_sync infrastructure so that its safe on 32bit arches as
well.

Based on a prior patch from Stephen Hemminger

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: Greg Rose <gregory.v.rose@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Eric Dumazet 2011-06-22 05:01:35 +00:00 committed by Jeff Kirsher
parent 98b9e48fca
commit 4197aa7bb8
2 changed files with 48 additions and 12 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
drivers/net/ethernet/intel/ixgbevf/ixgbevf.h
View file

@ -34,6 +34,7 @@
#include <linux/io.h>
#include <linux/netdevice.h>
#include <linux/if_vlan.h>
#include <linux/u64_stats_sync.h>
#include "vf.h"
@ -71,12 +72,13 @@ struct ixgbevf_ring {
struct ixgbevf_rx_buffer *rx_buffer_info;
};
u64 total_bytes;
u64 total_packets;
struct u64_stats_sync syncp;
u16 head;
u16 tail;
unsigned int total_bytes;
unsigned int total_packets;
u16 reg_idx; /* holds the special value that gets the hardware register
* offset associated with this ring, which is different
* for DCB and RSS modes */

52
drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
View file

@ -270,11 +270,10 @@ static bool ixgbevf_clean_tx_irq(struct ixgbevf_adapter *adapter,
IXGBE_WRITE_REG(hw, IXGBE_VTEICS, tx_ring->v_idx);
}
u64_stats_update_begin(&tx_ring->syncp);
tx_ring->total_bytes += total_bytes;
tx_ring->total_packets += total_packets;
netdev->stats.tx_bytes += total_bytes;
netdev->stats.tx_packets += total_packets;
u64_stats_update_end(&tx_ring->syncp);
return count < tx_ring->work_limit;
}
@ -597,10 +596,10 @@ static bool ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector,
if (cleaned_count)
ixgbevf_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
u64_stats_update_begin(&rx_ring->syncp);
rx_ring->total_packets += total_rx_packets;
rx_ring->total_bytes += total_rx_bytes;
adapter->netdev->stats.rx_bytes += total_rx_bytes;
adapter->netdev->stats.rx_packets += total_rx_packets;
u64_stats_update_end(&rx_ring->syncp);
return cleaned;
}
@ -2260,10 +2259,6 @@ void ixgbevf_update_stats(struct ixgbevf_adapter *adapter)
adapter->stats.vfgotc);
UPDATE_VF_COUNTER_32bit(IXGBE_VFMPRC, adapter->stats.last_vfmprc,
adapter->stats.vfmprc);
/* Fill out the OS statistics structure */
adapter->netdev->stats.multicast = adapter->stats.vfmprc -
adapter->stats.base_vfmprc;
}
/**
@ -3220,11 +3215,50 @@ static void ixgbevf_shutdown(struct pci_dev *pdev)
pci_disable_device(pdev);
}
static struct rtnl_link_stats64 *ixgbevf_get_stats(struct net_device *netdev,
struct rtnl_link_stats64 *stats)
{
struct ixgbevf_adapter *adapter = netdev_priv(netdev);
unsigned int start;
u64 bytes, packets;
const struct ixgbevf_ring *ring;
int i;
ixgbevf_update_stats(adapter);
stats->multicast = adapter->stats.vfmprc - adapter->stats.base_vfmprc;
for (i = 0; i < adapter->num_rx_queues; i++) {
ring = &adapter->rx_ring[i];
do {
start = u64_stats_fetch_begin_bh(&ring->syncp);
bytes = ring->total_bytes;
packets = ring->total_packets;
} while (u64_stats_fetch_retry_bh(&ring->syncp, start));
stats->rx_bytes += bytes;
stats->rx_packets += packets;
}
for (i = 0; i < adapter->num_tx_queues; i++) {
ring = &adapter->tx_ring[i];
do {
start = u64_stats_fetch_begin_bh(&ring->syncp);
bytes = ring->total_bytes;
packets = ring->total_packets;
} while (u64_stats_fetch_retry_bh(&ring->syncp, start));
stats->tx_bytes += bytes;
stats->tx_packets += packets;
}
return stats;
}
static const struct net_device_ops ixgbe_netdev_ops = {
.ndo_open = ixgbevf_open,
.ndo_stop = ixgbevf_close,
.ndo_start_xmit = ixgbevf_xmit_frame,
.ndo_set_rx_mode = ixgbevf_set_rx_mode,
.ndo_get_stats64 = ixgbevf_get_stats,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_mac_address = ixgbevf_set_mac,
.ndo_change_mtu = ixgbevf_change_mtu,