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high Response Time

Discussion in 'TiVo Roamio DVRs' started by emax, Jan 18, 2014.

  1. emax

    emax New Member

    13
    0
    Aug 21, 2012
    Hi everyboy,

    my 1st time post.
    Santa got me a Roamio plus and i love it. Love the super fast interface and streaming.

    For network connection i used wireless connection for Roamio, my router is Lynksys 4500 N. The signal strength was 62-68%, it was okay but i would not always get great picture quality in Netflix streaming. When i ping the Tivo Roamio IP i would get response time from 20ms to 130ms.

    So i decided to run Cat6e cables. I hard wired both location where Tivo Roamio and Tivo XL are located.

    Now Tivo XL gets constant response time 1ms, its steady. Doesn't drop, even if i use Netflix stream or transfer shows from Roamio. Steady 1ms response time. great, right!!
    On the other hand Tivo Roamio is averaging 11ms-16ms in same scenario, that really bugs me.
    Its not the network line, because when i connect to same network plug my Laptop, TV, Blu-ray or xBox and stream to it i get 1ms.

    any ideas guys?

    thx,
    eMax
     
  2. kbmb

    kbmb Active Member

    1,291
    15
    Jun 22, 2004
    NH
    I know little about networking.....not sure whether the difference between 1ms and 10-20ms really makes a difference or not (guessing it doesn't).

    But I am wondering whether it has to do with the builtin stream in the Plus/Pro models.

    I have a Plus and a Basic, both on the same network, both connected via ethernet.

    I get consistent ping times to my Plus in the 10-20ms time.
    For the Basic however, I get 1-2ms response times.

    Since your Tivo XL doesn't have a stream it in, I'm wondering if that's similar to what I'm seeing between the Plus and Basic.

    -Kevin
     
  3. lessd

    lessd Active Member

    7,697
    5
    Jan 23, 2005
    CT
    I just tested my Roamio Plus against my TP4, using my Computer to ping each, I got 14ms from one the Roamio Plus, 3ms from another Roamio Plus, and back to 14ms from the 3rd Roamio Plus, and 3 ms for my TP4, this is a test I would have never done as I don't know what it means for ones user experience, I have a MoCA setup and get over 90Mb/s in xfers between Roamios.
     
  4. aaronwt

    aaronwt UHD Addict

    19,190
    25
    Jan 31, 2002
    Northern...
    I see a 5x longer ping time to my Romaio BAsic using wireless. But that has never affected how it is used. I still get rock solid streaming of TiVo shows over wireless. And Netflix still reaches SuperHD encodes just as fast as my Roamio Pro on a wired connection and stays solid the same as my Roamio Pro. From a user viewpoint my Roamio Basic over wireless has been identical in use to my Roamio Pro over a wired connection. The only time I see a difference is in show transfer speed. The Roamio Basic maxes out around 95Mb/s over wireless while the Roamio Pro will hit 180Mb/s transfer rates over a wired connection.
     
  5. pautler

    pautler Member

    61
    1
    Oct 10, 2013
    Also, keep in mind that many devices give a relatively low priority to responding to ping packets. In other words, when the box is busy and/or has other network traffic to send/receive, 'ping' takes a back seat to other types of traffic. I have no idea if that is the case for the Roamio, but it is quite common for other devices, and thus the response time for ping packets isn't all that meaningful.

    -Joe
     
  6. emax

    emax New Member

    13
    0
    Aug 21, 2012
    I understand that icmp is low priority traffic, I run constant ping for several min when tivo should be idle and it rarely drops below 10ms.

    How you guys measure the throughput rate on your Tivo?
     
  7. aaronwt

    aaronwt UHD Addict

    19,190
    25
    Jan 31, 2002
    Northern...
    Go to the network settings page and select network Diagnostics. Then go to Transfer history and it will show you the the speeds for the last transfers into the TiVo, out of the TiVo etc.
     
  8. pautler

    pautler Member

    61
    1
    Oct 10, 2013
  9. emax

    emax New Member

    13
    0
    Aug 21, 2012
    Thx Aaron,
    You make me wonder what kind of hard drive you have in your Tivo. Your write speed is quiet impressive.
     
  10. nooneuknow

    nooneuknow TiVo User Since 2007

    3,554
    0
    Feb 5, 2011
    Cox Cable...
    You need to take into account that MB (Megabytes) and Mb (Megabits) are very different numbers.

    I spend a few days over on Wikipedia seeing what tech matches up best, like network speeds in Gigabits, hard drive interfaces rated in Gigabytes, compared to actual read/write speeds in Megabytes, USB ratings and real-world throughput when overhead is factored-in, etc.

    Besides a sore neck, I was quite well re-educated on things I used to know, but forgot the importance of remembering, especially real-world comparisons & matching up speeds in the right context, etc...

    Gigabit Ethernet is closer to what you could call 100Megabyte Ethernet, when it comes to throughput.

    It gets to be even more fun when you have to factor in what revision the PCIexpress slot is on your computer, to know if it can even run a controller card at full speed and full duplex, and if that will make a SSD drive operate as fast as the speed you are paying for... Throw in some of the variables with USB3, overhead, and real-world throughput, for a platter drive, and you will have a headache (or I sure did).

    I really wish I hadn't bought all my computer mainboards a few days before the ones with PCIexpress 2.0 hit the market... All my peripheral add-in cards are running at half-speed (of what they would in a 2.0 slot), which makes for half speed SATA-III cards, half-speed USB3.0 Superspeed cards, and 1/3 speed video cards, and so on...

    I have to calculate bits-bytes & bytes-bits, factor in real-world throughput, then calculate if everything I install is running at half-speed through 1/4 speed...
     
  11. aaronwt

    aaronwt UHD Addict

    19,190
    25
    Jan 31, 2002
    Northern...
    The hard drives are the stock TiVo drives. Those are actually slow speeds for a hard drive. Even my hard drives I used thirteen years ago in 2001 had speeds several times that.
     
  12. richbrew

    richbrew TiVo Fan

    41
    0
    Feb 6, 2002
    Macon, GA
    The simplified version of all that is to say that a 180Mb/s network transfer rate equates to 22.5MB/s hard drive write speed, well below what even mechanical (not SSD) drives are capable of.
     
  13. emax

    emax New Member

    13
    0
    Aug 21, 2012
    Thank you!!! i missed his "b", i assumed is MByte. Thats makes a huge differnce ( basically divided by 8). So my 30MB on my Romio is not bad at all comparing to him.

    When saw his speeds, i was like did i get screwed on my Romio? I get those speeds on my gaming machine.

    Now i feel better. thx again
     
  14. emax

    emax New Member

    13
    0
    Aug 21, 2012
    agree, i missed his "b"
     

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