Author Topic: Raspberry PI 3!!!  (Read 8551 times)

xbs

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Re: Raspberry PI 3!!!
« Reply #30 on: March 20, 2016, 03:22:32 PM »
@verion

I'm getting ~20Mb/s sequencial read write and ~40Mb/s sequencial write read speeds running OpenELEC (Kodi).

Could you share your benchmark method?



« Last Edit: March 20, 2016, 03:57:49 PM by xbs »

verion

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Re: Raspberry PI 3!!!
« Reply #31 on: March 20, 2016, 03:34:55 PM »
Looks like you've mixed up write and read speeds - write should be slower.

Maybe you are not testing big enough chunk of data and it's get cached - because 40 is pretty high. I couldn't get past 34Mb/s for SSD in fast usb 3.0 enclosure. And as it is +10% faster than 2.5" HDD it confirms that RPi USB is the bottleneck.

---

I'm using the "dd" method. You can read about this and more sophisticated iotest method here:
http://www.pidramble.com/wiki/benchmarks/microsd-cards
« Last Edit: March 20, 2016, 03:46:41 PM by verion »

xbs

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Re: Raspberry PI 3!!!
« Reply #32 on: March 20, 2016, 03:45:54 PM »
Yes, i mixed up the read/write.

Going to read that.
Thank you.

xbs

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Re: Raspberry PI 3!!!
« Reply #33 on: March 20, 2016, 04:19:43 PM »
USB 3.0 - 16Gb
RPi3:~ # hdparm -t /dev/sda1

/dev/sda1:
 Timing buffered disk reads: 116 MB in  3.01 seconds =  38.60 MB/sec
RPi3:~ # dd if=/dev/zero of=/storage/test bs=8k count=50k && sync; rm -f /storage/test
51200+0 records in
51200+0 records out
419430400 bytes (400.0MB) copied, 17.259372 seconds, 23.2MB/s

Other USB 3.0 - 16Gb
RPi3:~ # hdparm -t /dev/sdb1

/dev/sdb1:
 Timing buffered disk reads: 122 MB in  3.02 seconds =  40.40 MB/sec


« Last Edit: March 20, 2016, 04:47:08 PM by xbs »