[dev] slstatus netspeeds component does not report speed on linux

[John Soros]

Hi.
On my system (Linux z.y 4.18.12-200.fc28.x86_64 #1 SMP Thu Oct 4
15:46:35 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux) the netspeeds
component of slstatus doesn't work at all. I get some Pib results for my
wireless network card and just 0 for my ethernet card.
I don't exactly understand how and where slstatus handles calling this
component twice, but from my debugging it is obvious it is called twice
for every slstatus update.
The issue seems to be that often, the read from the linux sys file
yields 0, and this makes the result of this component incoherent.
I really am not sure why this works, but with this patch I get reliable
and seemingly correct results. If someone can explain me how this works,
I would be very thankful.
Regards
John

[John Soros]

Okay, excuse me, my C knowlege is not great. I don't even understand how
that patch worked (it didn't), but I've figured out the reason: I have
two instances of netspeed, for two interfaces. So the rxbytes is getting
overwritten for the two different network interfaces.
Sorry for the noise.

Post by John Soros
Hi.
On my system (Linux z.y 4.18.12-200.fc28.x86_64 #1 SMP Thu Oct 4
15:46:35 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux) the netspeeds
component of slstatus doesn't work at all. I get some Pib results for my
wireless network card and just 0 for my ethernet card.
I don't exactly understand how and where slstatus handles calling this
component twice, but from my debugging it is obvious it is called twice
for every slstatus update.
The issue seems to be that often, the read from the linux sys file
yields 0, and this makes the result of this component incoherent.
I really am not sure why this works, but with this patch I get reliable
and seemingly correct results. If someone can explain me how this works,
I would be very thankful.
Regards
John