AC88U Core 1 at 100% and reducing DL speed

[BB88U]

So I am running the latest Merlin beta for the ac88u but tried with stock and older merlin FW too. Whenever I try and max out the connection, Core 1 is at 100% while 2 is at 2-3%. When I upload as much as possible I get 110MB/S but DL is stuck at 74MB/S at most (only at peak, usually hovers around 60MB). This is a symetrical 1Gbit fibre line, so speed up/down shouldnt be different.

My PC is connected with a gigabit cable, intel gigabit ethernet card and CPU/disk are no where near the limiting factor. So I assume its to do with the Router CPU, so I turned off all services like QOS, AIprotection and firewall and even tested a bunch of settings for my Intel networking card. While both helped a bit, I'm still getting the same problem.

(and yes 70MB/s is enough for any reasonable person, just bugs the hell out of me). Any thoughts? Is the CPU just too weak? No way to get it to work both cores?

 

[L&LD]

Did you perform a full reset to factory defaults after flashing the firmware you want installed? Followed by a minimal and manual configuration to secure the router and connect to your ISP?

http://www.snbforums.com/threads/no...l-and-manual-configuration.27115/#post-205573

http://www.snbforums.com/threads/rt-ac66u-slow-wan-to-lan.12973/page-3#post-269410

http://www.snbforums.com/threads/faq-nvram-and-factory-default-reset.22822/


Make sure you don't use a saved backup config file. Try using new ssid's (passwords can be the same) with both ssid/password containing only alphanumeric characters. Test with defaults (after above steps) and only customize one item at a time, testing afterwards, to see which option or combination of options gives you the problem again (if it does, the full reset fixes a lot of random bugs and glitches on it's own).

 

[BB88U]

Did you perform a full reset to factory defaults after flashing the firmware you want installed? Followed by a minimal and manual configuration to secure the router and connect to your ISP?

http://www.snbforums.com/threads/no...l-and-manual-configuration.27115/#post-205573

http://www.snbforums.com/threads/rt-ac66u-slow-wan-to-lan.12973/page-3#post-269410

http://www.snbforums.com/threads/faq-nvram-and-factory-default-reset.22822/


Make sure you don't use a saved backup config file. Try using new ssid's (passwords can be the same) with both ssid/password containing only alphanumeric characters. Test with defaults (after above steps) and only customize one item at a time, testing afterwards, to see which option or combination of options gives you the problem again (if it does, the full reset fixes a lot of random bugs and glitches on it's own).

I did all of this but I dont see how it is connected with the issue. As I said the issue exists with both stock and multiple Merlin builds... I dont think its a FW issue.

 

[L&LD]

If you did all the suggestions in the links I provided, the hardware seems faulty to me.

RMA it.

The processors used in the RT-AC88U is much more robust than what your use shows.

 

[BB88U]

If you did all the suggestions in the links I provided, the hardware seems faulty to me.

RMA it.

The processors used in the RT-AC88U is much more robust than what your use shows.

Thanks but remember I am talking about MB not Mb. Ie 75% maxing out a gigabit connection. Plus the UL speed is fine.. just seems strange to me.

 

[BB88U]

Thanks but remember I am talking about MB not Mb. Ie 75% maxing out a gigabit connection. Plus the UL speed is fine.. just seems strange to me.

Also I found this one: http://www.snbforums.com/threads/bug-cpu-loading-is-100-in-core-1.29193/ - reached out but no reply yet.

 

[L&LD]

Thanks but remember I am talking about MB not Mb. Ie 75% maxing out a gigabit connection. Plus the UL speed is fine.. just seems strange to me.

MB! Got it.

Is this wired to the router? Or wireless? If wireless, how far from the router, how many obstacles between them?

If you connect your fastest computer to the modem directly (via LAN cable) what are the speeds then?

 

[BB88U]

MB! Got it.

Is this wired to the router? Or wireless? If wireless, how far from the router, how many obstacles between them?

If you connect your fastest computer to the modem directly (via LAN cable) what are the speeds then?

This is my fastest computer wired with gigabit ethernet...

 

[L&LD]

This is my fastest computer wired with gigabit ethernet...

How fast are your speeds connected directly to the modem/ONT?

 

[BB88U]

How fast are your speeds connected directly to the modem/ONT?

It's Fiber, think I need the router in between?

 

[L&LD]

No, you shouldn't.

But don't leave your computer 'bare' to the internet like that for any length of time though (do the speedtest and disconnect).

 

[BB88U]

No, you shouldn't.

But don't leave your computer 'bare' to the internet like that for any length of time though (do the speedtest and disconnect).

OK just tried, doesn't work.

 

[L&LD]

Turn off the modem/ONT for 10 minutes or more.

Turn it on and wait for it to fully boot (5 minutes).

Plug in your computer and turn it on (or, reboot it at that time).

You may have to do the same when you put the router back into play.

 

[BB88U]

Turn off the modem/ONT for 10 minutes or more.

Turn it on and wait for it to fully boot (5 minutes).

Plug in your computer and turn it on (or, reboot it at that time).

You may have to do the same when you put the router back into play.

Can't do that right now. Will try another time.

 

[ColinTaylor]

You appear to be getting roughly the same results as in Tim's review. http://www.smallnetbuilder.com/wire...3100-gigabit-router-reviewed?showall=&start=2

 

[BB88U]

You appear to be getting roughly the same results as in Tim's review. http://www.smallnetbuilder.com/wire...3100-gigabit-router-reviewed?showall=&start=2

really disappointing if this is normal behaviour...

 

[BB88U]

really disappointing if this is normal behaviour...

I mean, why even have dual core CPU in the router if the software doesn't use it?

 

[RMerlin]

I mean, why even have dual core CPU in the router if the software doesn't use it?

Some software will run on one core, the rest will run on the other. Lack of multithreading in the networking code doesn't mean that nothing else uses the other core. For instance, it means you can get nearly full throughput at the same time as you are using OpenVPN.

 

[BB88U]

Some software will run on one core, the rest will run on the other. Lack of multithreading in the networking code doesn't mean that nothing else uses the other core. For instance, it means you can get nearly full throughput at the same time as you are using OpenVPN.

OK true but it would make a LOT of sense to have networking run on two wouldn't it?

 

[L&LD]

BB88U, what you need is the BRT-AC828/M.2.

http://www.snbforums.com/threads/ne...-dual-wan-vpn-router.32839/page-2#post-265829


Sure, it is above what your ISP offers now, but there is nothing in consumerland that does a true 1Gbps U/D consecutively either.

Let's see what your raw ISP speeds are (straight from the modem/ONT) and then you'll know for sure if you need to change routers.