75M/75M fiber, download slow when uploading full
Posted: Thu Aug 14, 2014 10:27 pm
Hi,
I have 75/75 fiber, that speed tests max 85/90.
(Both wan and lan ports both confirmed gigabit from system log.)
I set qos to 72/75, as that is well below the limits. Pings never go above 10 ms to google during any speed tests. ICMP and packets smaller than 85 are high priority.
Normal http class I limited down to 70/72, so there is space for any ACKs, priority, etc.
However, when downloading a huge file (linux distro by test), the download speed crawls down to <900 kB/s when uploading at full 70 or so Mbit in speed test. The router cpu load is not maxed out (WNDR3800 @800mhz) and ping -t google.com is showing 10 ms.
Why are downloads being killed, even with so much overhead available? Even at full 70Mbit download, the upload of acks is around 1 Mbit.
I have the same issue with latest trunk openwrt.
I thought that UPLOAD at normal priority wouldn't slow down the ACKs at high priority (which is confirmed to be going there), especially while DL is barely used!?
I have 75/75 fiber, that speed tests max 85/90.
(Both wan and lan ports both confirmed gigabit from system log.)
I set qos to 72/75, as that is well below the limits. Pings never go above 10 ms to google during any speed tests. ICMP and packets smaller than 85 are high priority.
Normal http class I limited down to 70/72, so there is space for any ACKs, priority, etc.
However, when downloading a huge file (linux distro by test), the download speed crawls down to <900 kB/s when uploading at full 70 or so Mbit in speed test. The router cpu load is not maxed out (WNDR3800 @800mhz) and ping -t google.com is showing 10 ms.
Why are downloads being killed, even with so much overhead available? Even at full 70Mbit download, the upload of acks is around 1 Mbit.
I have the same issue with latest trunk openwrt.
I thought that UPLOAD at normal priority wouldn't slow down the ACKs at high priority (which is confirmed to be going there), especially while DL is barely used!?