On 2019-03-15 17:38, Johannes Berg wrote:
On Wed, 2019-03-13 at 11:08 +0800, Yibo Zhao wrote:
Currently, we are using u32 for tx_bytes in fq_tin.
If the throughput stays more than 1.2Gbps, tx_bytes
statistics overflow in about 1 min.
In order to allow us to trace the tx_bytes statistics
for longer time in high throughput, change its type
from u32 to u64.
Hmm. 64-bit values are kinda expensive on 32-bit architectures. How
badly do you need this? I mean ... worst case you just have to capture
every 30 seconds or so if you're doing really high throughput with HE
or
something?
johannes
Hi Johannes,
I understand your concern. Yes, I am using high end AP for throughput
test. I'd say 1.2 Gbps is not the worst case since we can achieve max
1.4Gbps according to our test. AFAIK, for most throughput cases, 1min is
the minimum requirement. And I think, with more and more high end
products(even higher throughput) on the ways to the market, it is highly
possible that 30s is not a safe time before overflow.
--
Yibo
