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TUSB8041: TUSB8041 throughput test

Intellectual 1270 points

Replies: 9

Views: 627

Part Number: TUSB8041

Hi team,

I am working with one of my customer & they want to use TUSB8041 - USB3.0 Hub.

 Their query is related to throughput.

Practically what throughput can be expected from TUSB8041 (USB3.0) considering below condition.

1). with only one down stream port is active

2). with two down stream ports are active

3). with three down stream ports are active

4). with all down stream ports are active

At this moment they have used competition device  they are struggling to achieve the throughput so if prove we have good throughput we have better chance to win the HUB socket.

Also we have ref. design TIDA-00288, is there any throughput test results available for this design (USB3.0) devices connected on downstream ports?

Need quick help here.

Mitesh

  • Mitesh,

    I am acquiring an EVM and will report the results as soon as possible,

    Best,
    Gerasimos
  • In reply to Gerasimos Madalvanos66:

    Testing the throughput now, the maximum real throughput I'm seeing is 368.2MB/s read speed and 167.7MB/s write speed. This did not change with multiple devices downstream.
  • In reply to Gerasimos Madalvanos66:

    Hi Gerasimos,

    Thanks for the quick help.

    I believe 368.2MB/s is  equivalent to 368.2MB/s X 8 = 2945.6 Mbps & 167.7MB/s is equivalent to 167.7MB/s X 1341.6 Mbps.

    These writing & reading are simultaneous or separate operation? 

    Kindly elaborate how did you test this as I have to explain this to customer & might face more questions on testing.

    Mitesh

     

  • In reply to Miteshkumar Dalabhai Patel:

    Gerasimos,

    Is there any bottleneck or limitation not achieving even higher speed than the numbers you have shared so we can understand while designing?

    Mitesh
  • In reply to Miteshkumar Dalabhai Patel:

    Mitesh

    The test was using CrystalDiskMark utility, and measured the reading and writing separately, not simultaneously. Multiple instances were run to test multiple devices at once. The connection was a USB3.0 A to C cable connected from the 8041 to a USB C Sandisk SSD. The additional devices were Flash drives connected to the other ports on the 8041.

    Please let me know if further explanation is necessary.
  • In reply to Gerasimos Madalvanos66:

    Hi Gerasimos,

    Is there any possibility of achieve higher speed than the shared number? If yes, what are the factors to achieve higher speed?

    Customer is ok with number you have shared but just want to know in case we can explain them & help to win their confidence for this device.

    Mitesh
  • In reply to Miteshkumar Dalabhai Patel:

    I believe these are close to the highest real speeds achievable with the TUSB8041. The maximum theoretical read/write speed of the ssd is 850MB/s, which we did not come close to.
  • In reply to Gerasimos Madalvanos66:

    In addition, because of USB overhead, the SSD won't reach the theoretical maximum. The hub wont affect the overhead, because that is on the host controller side, however the hub has additional buffers that can boost throughput a little bit.
  • In reply to Gerasimos Madalvanos66:

    Thanks

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