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custom util and iperf data rates don't match
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I'm working with a custom Linux based board. We have 2 wifi interfaces. To measure data rates going through them I wrote a simple program running in user space. Essentially it is reading
/sys/class/net/wlan0/statistics/rx_bytes
/sys/class/net/wlan0/statistics/tx_bytes
/sys/class/net/wlan1/statistics/rx_bytes
/sys/class/net/wlan1/statistics/tx_bytes
once a second (each file is read in a separate thread), takes a difference from the previous value and calculates the data rate.
To test is I ran an iperf. Here is where I'm confused. For some reason my iperf data rate is much lower (roughly by 5 to 8 Mbps. I'm sending data at 140 Mbps with iperf). I looked through the code for my application and just can't find a fault with it (thought it is very possible I'm making a mistake somewhere). Is there something about iperf I don't know? Why am I seeing such a difference?
linux iperf
asked 7 mins ago
flashburnflashburn
1011
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flashburn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
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I'm working with a custom Linux based board. We have 2 wifi interfaces. To measure data rates going through them I wrote a simple program running in user space. Essentially it is reading
/sys/class/net/wlan0/statistics/rx_bytes
/sys/class/net/wlan0/statistics/tx_bytes
/sys/class/net/wlan1/statistics/rx_bytes
/sys/class/net/wlan1/statistics/tx_bytes
once a second (each file is read in a separate thread), takes a difference from the previous value and calculates the data rate.
To test is I ran an iperf. Here is where I'm confused. For some reason my iperf data rate is much lower (roughly by 5 to 8 Mbps. I'm sending data at 140 Mbps with iperf). I looked through the code for my application and just can't find a fault with it (thought it is very possible I'm making a mistake somewhere). Is there something about iperf I don't know? Why am I seeing such a difference?
linux iperf
asked 7 mins ago
flashburnflashburn
1011
New contributor
flashburn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I'm working with a custom Linux based board. We have 2 wifi interfaces. To measure data rates going through them I wrote a simple program running in user space. Essentially it is reading
/sys/class/net/wlan0/statistics/rx_bytes
/sys/class/net/wlan0/statistics/tx_bytes
/sys/class/net/wlan1/statistics/rx_bytes
/sys/class/net/wlan1/statistics/tx_bytes
once a second (each file is read in a separate thread), takes a difference from the previous value and calculates the data rate.
To test is I ran an iperf. Here is where I'm confused. For some reason my iperf data rate is much lower (roughly by 5 to 8 Mbps. I'm sending data at 140 Mbps with iperf). I looked through the code for my application and just can't find a fault with it (thought it is very possible I'm making a mistake somewhere). Is there something about iperf I don't know? Why am I seeing such a difference?
linux iperf
asked 7 mins ago
flashburnflashburn
1011
New contributor
flashburn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I'm working with a custom Linux based board. We have 2 wifi interfaces. To measure data rates going through them I wrote a simple program running in user space. Essentially it is reading
/sys/class/net/wlan0/statistics/rx_bytes
/sys/class/net/wlan0/statistics/tx_bytes
/sys/class/net/wlan1/statistics/rx_bytes
/sys/class/net/wlan1/statistics/tx_bytes
once a second (each file is read in a separate thread), takes a difference from the previous value and calculates the data rate.
To test is I ran an iperf. Here is where I'm confused. For some reason my iperf data rate is much lower (roughly by 5 to 8 Mbps. I'm sending data at 140 Mbps with iperf). I looked through the code for my application and just can't find a fault with it (thought it is very possible I'm making a mistake somewhere). Is there something about iperf I don't know? Why am I seeing such a difference?
linux iperf
linux iperf
asked 7 mins ago
flashburnflashburn
1011
New contributor
flashburn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 7 mins ago
flashburnflashburn
1011
New contributor
flashburn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 7 mins ago
flashburnflashburn
1011
New contributor
flashburn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 7 mins ago
flashburnflashburn
1011
asked 7 mins ago
flashburnflashburn
1011
1011
New contributor
flashburn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
flashburn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
flashburn is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
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