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RT-AC87U - Frustrations...

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quantenna have single core ? Asus says that is dual core.
RT-AC87U is designed for pure performance — as well as its main 1 GHz dual-core processor, RT-AC87U also has a separate dual-core processor that's dedicated solely to 5G Hz 4x4 Wi-Fi related tasks.
Click to expand...
 
maybe not. QHS710 is a first wave and have two arc 700 cores, QHS 840 (QSR1000) is a second wave....
Of course ARC700 is a one core procesor but quantenna use two arc700 procesor in QHS710.

qhs.png
 
Hm. I would have to check syslog, because cpuinfo only reports a single core.

Sent from my Nexus 5X using Tapatalk
 
RMerlin said:
Hm. I would have to check syslog, because cpuinfo only reports a single core.
Click to expand...

The second ARC is likely hidden from Linux on the primary core running QTN's firmware for all of the special sauce...
 
sfx2000 said:
The second ARC is likely hidden from Linux on the primary core running QTN's firmware for all of the special sauce...
Click to expand...

Quantenna lists the QSR1000 as a different product than the QHS710, so there is no reason to believe that the block diagram would be the same. We'd need the QSR1000's actual block diagram to know for sure.

I just booted my RT-AC87U and checked its boot log not only is there no reference to a second CPU in dmesg, and the kernel itself is compiled without SMP support. So from the Quantenna's firmware point of view, there's just one CPU core.

Personally, I don't consider a specialized core to count as a regular core. Otherwise, that would mean the RT-AC5300 is a pentacore system, as it has one dual core Cortex A9 and each of the three radio also has a single A7 core.
 
The other ARC core might only show up as a device driver to Linux on the primary core - running it's own RTOS, which is reasonable... and a common approach...

Like you - I wouldn't consider it a second "core" from a general compute perspective...
 
I jumped ship to a refurb AirPort Extreme. Less than half the price of the 87u....and works perfectly as advertised. Less features but wireless printing works perfectly for several days in a row. So nice, both 2.4 and 5 work, range is great. All 15 devices are able to play nicely..... Even on Thnaksgiving with 5 devices chugging down video. For a consumption oriented family with lots of Apple stuff, it's a great fit...I'll check back in in a year though for the 5300. It looks really hot....just need it to mature :) though I'm feeling pretty burned at this point though. Happy Thanksgiving all
 
Allograft said:
I jumped ship to a refurb AirPort Extreme. Less than half the price of the 87u....and works perfectly as advertised. Less features but wireless printing works perfectly for several days in a row. So nice, both 2.4 and 5 work, range is great. All 15 devices are able to play nicely..... Even on Thnaksgiving with 5 devices chugging down video. For a consumption oriented family with lots of Apple stuff, it's a great fit...I'll check back in in a year though for the 5300. It looks really hot....just need it to mature :) though I'm feeling pretty burned at this point though. Happy Thanksgiving all
Click to expand...

Bummer. I had some of the same issues but firmware fixed them. I dislike the Apple router as its not feature rich and doesn't have enough GB ports. I do however agree that with a predominantly Apple device household it works better than most other wireless routers.

Recently though I have been testing Meraki hardware as they offer mesh networking. In a home of my size a mesh network is desirable as the handoff is seamless and I tend to move between floors and the exterior of the home.
 
I also have problem connecting to 5Ghz band initially. I tried numerous options and later I found out I have to move the control channel to <104 (it seems like most of the devices cannot detect channel higher than 104) in order to get a stable 5G wireless connection and at the same time reduce the power of the 2.4Ghz band or switch it off to get a stable 5Ghz wifi connection.
It seems to me that if you have both bands set to same transmit power, you device just keeps hoping between two bands of wifi signal that seems to connect and disconnect most of the time.
It seems to me all these so-called dual band routers the manufacturer boasts about is just hype rather than something which is usable. In the end, you'd rather set it to run on just only one band on your router.
 
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