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  1. ./p2pBandwidthLatencyTest
  2. [P2P (Peer-to-Peer) GPU Bandwidth Latency Test]
  3. Device: 0, NVIDIA GeForce RTX 4090, pciBusID: 1, pciDeviceID: 0, pciDomainID:0
  4. Device: 1, NVIDIA GeForce RTX 4090, pciBusID: 23, pciDeviceID: 0, pciDomainID:0
  5. Device: 2, NVIDIA GeForce RTX 4090, pciBusID: 41, pciDeviceID: 0, pciDomainID:0
  6. Device: 3, NVIDIA GeForce RTX 4090, pciBusID: 61, pciDeviceID: 0, pciDomainID:0
  7. Device: 4, NVIDIA GeForce RTX 4090, pciBusID: 81, pciDeviceID: 0, pciDomainID:0
  8. Device: 5, NVIDIA GeForce RTX 4090, pciBusID: a1, pciDeviceID: 0, pciDomainID:0
  9. Device: 6, NVIDIA GeForce RTX 4090, pciBusID: c1, pciDeviceID: 0, pciDomainID:0
  10. Device: 7, NVIDIA GeForce RTX 4090, pciBusID: e1, pciDeviceID: 0, pciDomainID:0
  11. Device=0 CAN Access Peer Device=1
  12. Device=0 CAN Access Peer Device=2
  13. Device=0 CAN Access Peer Device=3
  14. Device=0 CAN Access Peer Device=4
  15. Device=0 CAN Access Peer Device=5
  16. Device=0 CAN Access Peer Device=6
  17. Device=0 CAN Access Peer Device=7
  18. Device=1 CAN Access Peer Device=0
  19. Device=1 CAN Access Peer Device=2
  20. Device=1 CAN Access Peer Device=3
  21. Device=1 CAN Access Peer Device=4
  22. Device=1 CAN Access Peer Device=5
  23. Device=1 CAN Access Peer Device=6
  24. Device=1 CAN Access Peer Device=7
  25. Device=2 CAN Access Peer Device=0
  26. Device=2 CAN Access Peer Device=1
  27. Device=2 CAN Access Peer Device=3
  28. Device=2 CAN Access Peer Device=4
  29. Device=2 CAN Access Peer Device=5
  30. Device=2 CAN Access Peer Device=6
  31. Device=2 CAN Access Peer Device=7
  32. Device=3 CAN Access Peer Device=0
  33. Device=3 CAN Access Peer Device=1
  34. Device=3 CAN Access Peer Device=2
  35. Device=3 CAN Access Peer Device=4
  36. Device=3 CAN Access Peer Device=5
  37. Device=3 CAN Access Peer Device=6
  38. Device=3 CAN Access Peer Device=7
  39. Device=4 CAN Access Peer Device=0
  40. Device=4 CAN Access Peer Device=1
  41. Device=4 CAN Access Peer Device=2
  42. Device=4 CAN Access Peer Device=3
  43. Device=4 CAN Access Peer Device=5
  44. Device=4 CAN Access Peer Device=6
  45. Device=4 CAN Access Peer Device=7
  46. Device=5 CAN Access Peer Device=0
  47. Device=5 CAN Access Peer Device=1
  48. Device=5 CAN Access Peer Device=2
  49. Device=5 CAN Access Peer Device=3
  50. Device=5 CAN Access Peer Device=4
  51. Device=5 CAN Access Peer Device=6
  52. Device=5 CAN Access Peer Device=7
  53. Device=6 CAN Access Peer Device=0
  54. Device=6 CAN Access Peer Device=1
  55. Device=6 CAN Access Peer Device=2
  56. Device=6 CAN Access Peer Device=3
  57. Device=6 CAN Access Peer Device=4
  58. Device=6 CAN Access Peer Device=5
  59. Device=6 CAN Access Peer Device=7
  60. Device=7 CAN Access Peer Device=0
  61. Device=7 CAN Access Peer Device=1
  62. Device=7 CAN Access Peer Device=2
  63. Device=7 CAN Access Peer Device=3
  64. Device=7 CAN Access Peer Device=4
  65. Device=7 CAN Access Peer Device=5
  66. Device=7 CAN Access Peer Device=6
  67.  
  68. ***NOTE: In case a device doesn't have P2P access to other one, it falls back to normal memcopy procedure.
  69. So you can see lesser Bandwidth (GB/s) and unstable Latency (us) in those cases.
  70.  
  71. P2P Connectivity Matrix
  72. D\D 0 1 2 3 4 5 6 7
  73. 0 1 1 1 1 1 1 1 1
  74. 1 1 1 1 1 1 1 1 1
  75. 2 1 1 1 1 1 1 1 1
  76. 3 1 1 1 1 1 1 1 1
  77. 4 1 1 1 1 1 1 1 1
  78. 5 1 1 1 1 1 1 1 1
  79. 6 1 1 1 1 1 1 1 1
  80. 7 1 1 1 1 1 1 1 1
  81. Unidirectional P2P=Disabled Bandwidth Matrix (GB/s)
  82. D\D 0 1 2 3 4 5 6 7
  83. 0 913.74 19.42 19.76 19.23 20.71 20.47 20.55 19.78
  84. 1 19.80 922.92 19.77 19.74 20.68 20.49 20.52 19.71
  85. 2 19.84 19.83 921.44 19.74 20.72 20.45 20.54 19.70
  86. 3 19.66 19.84 19.73 921.37 20.69 20.49 20.49 19.75
  87. 4 20.28 19.80 20.17 19.90 925.21 20.28 20.50 19.77
  88. 5 20.16 19.77 20.18 19.82 20.65 922.92 20.26 19.89
  89. 6 20.19 19.77 20.15 19.92 20.65 20.37 923.46 19.76
  90. 7 20.21 19.71 20.16 19.83 20.70 20.37 20.21 923.46
  91. Unidirectional P2P=Enabled Bandwidth (P2P Writes) Matrix (GB/s)
  92. D\D 0 1 2 3 4 5 6 7
  93. 0 913.69 26.23 26.39 26.39 25.41 25.56 24.64 25.56
  94. 1 26.26 940.13 26.39 26.39 24.50 25.56 25.56 24.65
  95. 2 26.26 26.39 941.37 26.39 25.41 24.64 25.56 25.56
  96. 3 26.26 26.39 26.39 940.70 25.41 25.56 24.63 25.57
  97. 4 25.57 24.64 25.57 25.57 940.89 26.26 26.39 26.39
  98. 5 25.41 25.56 24.64 25.56 26.26 940.27 26.39 26.39
  99. 6 24.49 25.56 25.57 24.64 26.26 26.39 941.16 26.40
  100. 7 25.41 24.64 25.57 25.56 26.26 26.39 26.39 941.27
  101. Bidirectional P2P=Disabled Bandwidth Matrix (GB/s)
  102. D\D 0 1 2 3 4 5 6 7
  103. 0 918.27 19.99 20.26 19.21 22.01 21.89 21.94 21.77
  104. 1 19.98 923.74 19.72 19.96 21.89 21.78 21.79 21.62
  105. 2 20.04 19.72 922.65 20.13 21.96 21.88 21.90 21.74
  106. 3 19.18 20.09 20.11 923.74 21.84 21.69 21.77 21.57
  107. 4 21.43 21.42 21.47 21.49 922.92 21.90 21.59 21.77
  108. 5 21.17 21.36 21.40 21.16 21.73 922.92 21.72 21.54
  109. 6 21.33 21.31 21.38 21.36 21.58 21.81 923.19 21.69
  110. 7 20.94 21.03 21.16 20.93 21.52 21.44 21.47 922.92
  111. Bidirectional P2P=Enabled Bandwidth Matrix (GB/s)
  112. D\D 0 1 2 3 4 5 6 7
  113. 0 917.71 50.91 51.23 51.21 46.24 47.10 46.07 47.06
  114. 1 50.98 920.47 51.24 51.24 44.88 47.08 47.06 46.12
  115. 2 50.99 51.23 921.01 51.24 46.40 46.09 47.07 47.08
  116. 3 50.99 51.24 51.25 920.74 46.29 47.08 46.09 47.08
  117. 4 47.08 46.12 47.06 47.11 921.01 50.97 51.21 51.21
  118. 5 46.82 47.07 46.09 47.09 50.97 922.54 51.22 51.22
  119. 6 45.84 47.08 47.08 46.10 50.97 51.20 921.01 51.22
  120. 7 46.82 46.13 47.07 47.09 50.95 51.20 51.19 919.66
  121. P2P=Disabled Latency Matrix (us)
  122. GPU 0 1 2 3 4 5 6 7
  123. 0 1.36 11.50 11.43 11.59 11.34 12.58 11.95 11.83
  124. 1 19.98 1.37 20.09 20.10 12.94 11.56 11.63 13.74
  125. 2 11.32 11.26 1.27 11.34 12.39 14.32 12.97 11.85
  126. 3 11.50 12.49 11.59 1.34 12.02 14.60 13.25 11.62
  127. 4 13.04 12.66 12.72 12.85 1.31 11.00 11.29 10.40
  128. 5 11.85 14.43 11.36 12.12 11.10 1.37 10.41 10.39
  129. 6 11.26 13.52 12.85 11.15 11.03 10.41 1.32 10.41
  130. 7 13.57 12.85 12.95 13.66 10.33 10.28 10.31 1.29
  131.  
  132. CPU 0 1 2 3 4 5 6 7
  133. 0 2.56 8.68 8.46 8.32 7.49 7.42 7.62 7.43
  134. 1 8.69 2.42 8.21 8.10 7.22 7.21 7.23 7.18
  135. 2 8.43 8.11 2.48 8.13 7.27 7.24 7.29 7.23
  136. 3 8.27 8.00 8.08 2.42 7.24 7.24 7.23 7.23
  137. 4 7.79 7.52 7.58 7.51 2.12 6.67 6.83 6.68
  138. 5 7.82 7.44 7.57 7.40 6.65 2.11 6.71 6.67
  139. 6 7.77 7.46 7.58 7.45 6.65 6.64 2.14 6.72
  140. 7 7.80 7.45 7.54 7.44 6.68 6.65 6.69 2.14
  141. P2P=Enabled Latency (P2P Writes) Matrix (us)
  142. GPU 0 1 2 3 4 5 6 7
  143. 0 1.48 1.24 1.28 1.30 1.40 1.37 1.41 1.39
  144. 1 1.23 1.36 1.24 1.20 1.31 1.28 1.31 1.28
  145. 2 1.30 1.29 1.28 1.25 1.39 1.37 1.36 1.36
  146. 3 1.24 1.22 1.22 1.34 1.36 1.31 1.35 1.31
  147. 4 1.20 1.18 1.13 1.16 1.32 0.99 1.04 1.07
  148. 5 1.11 1.10 1.04 1.05 0.95 1.36 0.96 0.97
  149. 6 1.19 1.16 1.16 1.17 1.06 1.00 1.32 1.03
  150. 7 1.11 1.01 1.10 1.11 0.95 0.99 0.99 1.29
  151.  
  152. CPU 0 1 2 3 4 5 6 7
  153. 0 2.51 2.21 2.11 2.12 2.14 2.12 2.10 2.09
  154. 1 2.21 2.39 2.05 2.12 2.10 2.12 2.09 2.11
  155. 2 2.26 2.14 2.48 2.14 2.16 2.15 2.24 2.11
  156. 3 2.24 2.10 2.12 2.55 2.10 2.10 2.08 2.09
  157. 4 2.00 1.86 1.88 1.85 2.19 1.87 1.84 1.84
  158. 5 1.97 1.93 1.87 1.88 1.87 2.17 1.84 1.84
  159. 6 2.00 1.89 1.89 1.88 1.89 1.86 2.20 1.87
  160. 7 2.05 1.90 1.89 1.87 1.88 1.87 1.87 2.19
  161.  
  162. NOTE: The CUDA Samples are not meant for performance measurements. Results may vary when GPU Boost is enabled.
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