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Date: Tue, 25 May 2010 21:56:12 +0200 From: Francois Romieu <romieu@...zoreil.com> To: Junchang Wang <junchangwang@...il.com> Cc: netdev@...r.kernel.org Subject: Re: [PATCH] r8169: Add counters tx_bytes and rx_bytes for ethtool Junchang Wang <junchangwang@...il.com> : > Traffic stats counters (rx_bytes and tx_bytes) in net_device are > "unsigned long". On 32-bit systems, they wrap around every few > minutes, giving out wrong answers to the amount of traffic. To get the > right message, another available approach is "ethtool -S". However, > r8169 didn't support those two counters so far. ethtool is - imvho - biased toward hardware, not toward software emulation. If the packets are short enough, replace "_bytes" by "_packets", "_minutes" by "_hours" or "_every_day" and the same kind of problem appear. You can fix the application at zero cost in the kernel: poll < 34 s and update the application counters with the kernel counters increment. -- Ueimor -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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