Hi NVIDIA Team,
When I run deviceQuery on my newly bought AGX Orin Dev Kit, my Memory Bus Width is shown to be 128bit. But from the technical specifications of the AGX Orin module it’s supposed to be 256bit?
Have I misunderstood what these two values represent? Or is there any way to config this value to be 256bit as expected?
Thanks in advance!
Above is the screenshot of our deviceQuery.
I have the same issue. I’ve upgraded jetpack to version 5.1.1 already.
Hi,
This is a software bug.
We are actively working on the fix.
Sorry for the inconvenience.
Thanks.
So is there any info on the date releasing the fix? Would appreciate it.
Thanks.
Hi,
Sorry that we can not disclose schedule-related info here.
Please noted that the memory bus width for Orin is actually 256-bit.
This bug only causes incorrect reporting.
Thanks.
So, you mean that is deviceQuery bug only?
I’ve tested bandwidth speed using shmoo mode, this is result:
The maximum bw of HtoD: 36.7GB/s, DtoH: 36.6 GB/s, DtoD: 179.1 GB/s
As I know, the theoretical memory bandwidth is calculated as Memory interface * Memory Clock rate / 8 (GB/s). The maximum bandwidth calculated by the boost clock rate? So can you show me how can I recognize that Orin has interface 256-bit bus width?
Device 0: Orin
Shmoo Mode
…
Host to Device Bandwidth, 1 Device(s)
PINNED Memory Transfers
Transfer Size (Bytes) Bandwidth(GB/s)
1000 0.8
2000 0.6
3000 0.3
4000 1.1
5000 1.3
6000 1.5
7000 0.6
8000 1.9
9000 2.1
10000 2.2
11000 2.4
12000 2.5
13000 2.6
14000 2.8
15000 2.8
16000 3.0
17000 3.1
18000 1.4
19000 3.3
20000 3.4
22000 3.6
24000 3.8
26000 3.9
28000 4.1
30000 4.2
32000 4.3
34000 4.6
36000 4.6
38000 4.7
40000 4.9
42000 5.0
44000 5.1
46000 5.2
48000 5.3
50000 5.4
60000 5.7
70000 6.0
80000 6.2
90000 6.5
100000 6.6
200000 7.5
300000 7.9
400000 8.0
500000 7.6
600000 7.7
700000 7.9
800000 8.0
900000 8.0
1000000 8.1
2000000 8.4
3000000 8.5
4000000 8.5
5000000 8.6
6000000 10.1
7000000 22.5
8000000 22.8
9000000 22.5
10000000 14.0
11000000 12.0
12000000 25.5
13000000 17.1
14000000 31.3
15000000 22.3
16000000 36.5
18000000 36.6
20000000 36.6
22000000 27.9
24000000 28.6
26000000 28.6
28000000 28.6
30000000 28.6
32000000 28.6
36000000 28.6
40000000 28.6
44000000 28.7
48000000 28.7
52000000 30.4
56000000 36.7
60000000 36.7
64000000 36.7
68000000 36.7
…
Device to Host Bandwidth, 1 Device(s)
PINNED Memory Transfers
Transfer Size (Bytes) Bandwidth(GB/s)
1000 0.2
2000 0.5
3000 1.2
4000 0.8
5000 1.0
6000 1.5
7000 1.5
8000 2.0
9000 2.1
10000 2.2
11000 2.4
12000 2.9
13000 12.2
14000 3.1
15000 3.5
16000 4.0
17000 4.2
18000 4.5
19000 4.8
20000 5.5
22000 5.8
24000 6.5
26000 6.9
28000 6.6
30000 8.2
32000 8.7
34000 9.3
36000 10.3
38000 10.9
40000 11.3
42000 12.3
44000 11.2
46000 13.8
48000 14.6
50000 15.4
60000 18.5
70000 21.6
80000 25.7
90000 27.1
100000 28.0
200000 32.1
300000 33.7
400000 34.2
500000 31.6
600000 31.5
700000 32.6
800000 32.5
900000 33.2
1000000 32.6
2000000 35.1
3000000 35.8
4000000 34.6
5000000 35.8
6000000 36.0
7000000 36.2
8000000 36.1
9000000 36.2
10000000 36.3
11000000 36.4
12000000 36.3
13000000 36.3
14000000 36.4
15000000 36.4
16000000 36.4
18000000 36.5
20000000 36.5
22000000 36.5
24000000 36.5
26000000 36.5
28000000 36.5
30000000 36.5
32000000 36.5
36000000 36.6
40000000 36.6
44000000 36.6
48000000 36.6
52000000 36.6
56000000 36.6
60000000 36.6
64000000 36.6
68000000 36.6
…
Device to Device Bandwidth, 1 Device(s)
PINNED Memory Transfers
Transfer Size (Bytes) Bandwidth(GB/s)
1000 0.6
2000 0.6
3000 0.9
4000 1.2
5000 1.8
6000 3.1
7000 3.9
8000 3.5
9000 3.9
10000 2.8
11000 5.5
12000 6.4
13000 6.6
14000 4.8
15000 5.0
16000 5.4
17000 5.7
18000 5.9
19000 2.4
20000 10.2
22000 11.3
24000 11.0
26000 12.5
28000 9.4
30000 10.1
32000 10.8
34000 12.5
36000 13.7
38000 14.5
40000 15.1
42000 16.8
44000 5.2
46000 19.6
48000 19.9
50000 20.8
60000 25.1
70000 17.5
80000 19.9
90000 22.4
100000 24.7
200000 48.3
300000 71.0
400000 94.8
500000 96.6
600000 114.6
700000 131.9
800000 151.0
900000 168.5
1000000 161.3
2000000 155.2
3000000 125.7
4000000 135.7
5000000 143.3
6000000 148.3
7000000 152.1
8000000 155.4
9000000 157.5
10000000 160.1
11000000 161.9
12000000 163.6
13000000 164.1
14000000 165.9
15000000 166.2
16000000 167.2
18000000 169.5
20000000 170.2
22000000 171.2
24000000 172.0
26000000 173.1
28000000 166.0
30000000 174.0
32000000 174.3
36000000 175.0
40000000 163.0
44000000 176.2
48000000 176.7
52000000 171.4
56000000 177.5
60000000 177.7
64000000 179.1
68000000 178.1
Hi,
Yes, the bug is only in deviceQuery.
We are checking how to get the benchmark data of memory bandwidth with our internal team.
Will share more information with you later.
Thanks.
Hi,
Based on the below document, AGX Orin has the peak memory bandwidth of roughly 205 GB/s:
The measurement of 179.1 GB/s is inline with this number.
Thanks.
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