Idanwo ti o sopọ mọ itọsọna · Lile Ipele

Akopọ Communication ati NCCL adanwo

Test all-reduce, all-gather, broadcast and reduce-scatter roles, NCCL identity, network offloads, and a small sum-reduction example.

Jẹmọ itọsọna awọn ọnaIbaraẹnisọrọ akojọpọ Ati Nccl
Ibeere 1 ti 8

Kini iṣẹ-ṣiṣe idinku gbogbo ṣe aṣeyọri ni ikẹkọ pinpin?

Awotẹlẹ gbogbo ibeere8 ibeere

Awọn idahun ati awọn alaye han bi o ṣe n mu ibeere naa.

  1. Kini iṣẹ-ṣiṣe idinku gbogbo ṣe aṣeyọri ni ikẹkọ pinpin?
    • O daapọ awọn iye kọja gbogbo awọn GPUs ati fun gbogbo GPU ni abajade apapọ
    • O npa data laiṣe lati GPU kan
    • O dinku iyara aago GPU lati fi agbara pamọ
    • O firanṣẹ data lati gbogbo awọn GPU si disk ibi ipamọ kan
  2. Kini adape NCCL duro fun?
    • Ohunkikan Iṣiro Iṣupọ Layer
    • Network kaṣe Iṣakoso kannaa
    • NVIDIA Collective Communications Library
    • Nomba Convolution Compute Library
  3. Why can chunked ring communication be useful for a large tensor?
    • It guarantees constant latency for any number of devices
    • Chunks can be streamed across participating links instead of waiting for one monolithic transfer
    • It makes topology irrelevant
    • It prevents all network contention
  4. Iṣe apapọ wo ni o ṣajọ nkan data GPU kọọkan sinu ẹda kikun ti o waye nipasẹ gbogbo awọn GPU?
    • Igbohunsafefe
    • Din-tuka
    • Idena
    • Gbogbo-kó
  5. What does a supported network reduction offload such as SHARP do?
    • Guarantee exactly half the traffic for every collective
    • Remove the need for participating ranks
    • Perform some reduction work in compatible network hardware
    • Turn all-gather into a local memory copy
  6. Isopọmọra wo ni NCCL maa n lo fun ibaraẹnisọrọ LARIN awọn olupin (awọn apa)?
    • InfiniBand tabi RoCE
    • Okun USB
    • Iho PCIe nikan
    • Wi-Fi
  7. Three ranks contribute scalar values 2, 3 and 5 to a sum all-reduce. What value does each receive?
    • Only its own original value
    • 3 for the middle rank and nothing elsewhere
    • The average 3.33 unless requested separately
    • 10
  8. Which collective combines contributions but distributes reduced pieces instead of the entire reduced buffer to every rank?
    • Gbogbo-kó
    • Din-tuka
    • Igbohunsafefe
    • A standalone model checkpoint