From: Ben Hutchings <bhutchings@solarflare.com>
To: Stephen Hemminger <shemminger@vyatta.com>
Cc: "David S. Miller" <davem@davemloft.net>,
Jon Mason <jdmason@kudzu.us>,
netdev@vger.kernel.org
Subject: Re: [PATCH 9/9] s2io: implement 64 bit stats
Date: Thu, 09 Jun 2011 02:52:09 +0100 [thread overview]
Message-ID: <1307584329.22348.525.camel@localhost> (raw)
In-Reply-To: <20110609005417.817071451@vyatta.com>
On Wed, 2011-06-08 at 17:54 -0700, Stephen Hemminger wrote:
> plain text document attachment (s2io-stats.patch)
> Convert s2io driver to 64 bit statistics interface.
> This driver keeps it private set of counters so change those
> to the 64 bit netlink type.
>
> Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
>
>
> --- a/drivers/net/s2io.c 2011-06-07 17:35:37.372117743 -0700
> +++ b/drivers/net/s2io.c 2011-06-07 17:44:14.102680070 -0700
> @@ -4897,7 +4897,8 @@ static void s2io_updt_stats(struct s2io_
> * Return value:
> * pointer to the updated net_device_stats structure.
> */
> -static struct net_device_stats *s2io_get_stats(struct net_device *dev)
> +static struct rtnl_link_stats64 *s2io_get_stats(struct net_device *dev,
> + struct rtnl_link_stats64 *net_stats)
> {
> struct s2io_nic *sp = netdev_priv(dev);
> struct mac_info *mac_control = &sp->mac_control;
> @@ -4916,40 +4917,32 @@ static struct net_device_stats *s2io_get
> */
> delta = ((u64) le32_to_cpu(stats->rmac_vld_frms_oflow) << 32 |
> le32_to_cpu(stats->rmac_vld_frms)) - sp->stats.rx_packets;
> - sp->stats.rx_packets += delta;
> - dev->stats.rx_packets += delta;
> + sp->stats.tx_packets += delta;
This is now adding to tx_packets, not rx_packets.
> delta = ((u64) le32_to_cpu(stats->tmac_frms_oflow) << 32 |
> le32_to_cpu(stats->tmac_frms)) - sp->stats.tx_packets;
> sp->stats.tx_packets += delta;
> - dev->stats.tx_packets += delta;
>
> delta = ((u64) le32_to_cpu(stats->rmac_data_octets_oflow) << 32 |
> le32_to_cpu(stats->rmac_data_octets)) - sp->stats.rx_bytes;
> sp->stats.rx_bytes += delta;
> - dev->stats.rx_bytes += delta;
[...]
It seems to me that the delta calculations and sp->stats are no longer
necessary. These can be just:
net_stats->rx_packets = ((u64) le32_to_cpu(stats->rmac_vld_frms_oflow) << 32 |
le32_to_cpu(stats->rmac_vld_frms));
net_stats->tx_packets = ((u64) le32_to_cpu(stats->tmac_frms_oflow) << 32 |
le32_to_cpu(stats->tmac_frms));
net_stats->rx_bytes = ((u64) le32_to_cpu(stats->rmac_data_octets_oflow) << 32 |
le32_to_cpu(stats->rmac_data_octets));
...
[...]
> @@ -7447,7 +7437,7 @@ static int rx_osm_handler(struct ring_in
> if (err_mask != 0x5) {
> DBG_PRINT(ERR_DBG, "%s: Rx error Value: 0x%x\n",
> dev->name, err_mask);
> - dev->stats.rx_crc_errors++;
> + sp->stats.rx_crc_errors++;
[...]
This won't be atomic on 32-bit systems. If this isn't double-counting
CRC errors (I suspect it is) then there needs to be a separate unsigned
long counter that's folded in by s2io_get_stats().
Ben.
--
Ben Hutchings, Senior Software Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.
prev parent reply other threads:[~2011-06-09 1:52 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-09 0:53 [PATCH 0/9] 64 bit statistics for VM and 10G drivers Stephen Hemminger
2011-06-09 0:53 ` [PATCH 1/9] vmxnet3: convert to 64 bit stats interface Stephen Hemminger
2011-06-09 5:17 ` [Pv-drivers] " Scott Goldman
2011-06-09 0:53 ` [PATCH 2/9] xen: " Stephen Hemminger
2011-06-09 1:56 ` Ben Hutchings
2011-06-14 21:07 ` Konrad Rzeszutek Wilk
2011-06-15 8:38 ` [Xen-devel] " Ian Campbell
2011-06-09 0:53 ` [PATCH 3/9] veth: convert to 64 bit statistics Stephen Hemminger
2011-06-09 2:00 ` Ben Hutchings
2011-06-09 3:22 ` Stephen Hemminger
2011-06-10 16:34 ` Ben Hutchings
2011-06-09 6:26 ` David Miller
2011-06-09 0:54 ` [PATCH 4/9] ifb: convert to 64 bit stats Stephen Hemminger
2011-06-09 3:29 ` Eric Dumazet
2011-06-09 3:32 ` Stephen Hemminger
2011-06-09 3:37 ` Eric Dumazet
2011-06-09 0:54 ` [PATCH 5/9] netxen: convert to 64 bit statistics Stephen Hemminger
2011-06-09 6:13 ` Amit Salecha
2011-06-09 6:27 ` David Miller
2011-06-09 0:54 ` [PATCH 6/9] enic: update to support 64 bit stats Stephen Hemminger
2011-06-09 6:27 ` David Miller
2011-06-09 17:43 ` roprabhu
2011-06-09 0:54 ` [PATCH 7/9] myricom: update to " Stephen Hemminger
2011-06-09 6:27 ` David Miller
2011-06-09 0:54 ` [PATCH 8/9] niu: support 64 bit stats interface Stephen Hemminger
2011-06-09 6:27 ` David Miller
2011-06-09 0:54 ` [PATCH 9/9] s2io: implement 64 bit stats Stephen Hemminger
2011-06-09 1:52 ` Ben Hutchings [this message]
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