TechQA.

Question

Why does memory latency increase significantly before reaching the memory bandwidth limit?

score 38 · Answer 1 · 2024-02-01T07:12:25.953000

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Answer

38

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Why does memory latency increase significantly before reaching the memory bandwidth limit?

38 views Asked by Frontier_Setter At 01 February 2024 at 07:12

score 130 · Answer 2 · 2024-01-31T17:08:38.033000

Simple streaming loop shows higher effective B/W than DRAM B/W for small enough problems

130 views Asked by Nitin Malapally At 31 January 2024 at 17:08

score 55 · Answer 3 · 2024-01-05T12:14:32.947000

There is a huge speed difference between reading and writing in DRAM, is this normal?

55 views Asked by platelet At 05 January 2024 at 12:14

score 75 · Answer 4 · 2023-12-02T05:45:56.150000

memory bandwidth of convolutional layer: numbers calculations

75 views Asked by Singh At 02 December 2023 at 05:45

score 188 · Answer 5 · 2023-10-20T10:29:08.663000

Why using non-temporal store instructions cannot reduce memory bandwidth usage? (Writes seem to be generating extra reads)

188 views Asked by Frontier_Setter At 20 October 2023 at 10:29

score 27 · Answer 6 · 2023-09-21T22:29:08.990000

Why wide demux allows the partitioning of memory bandwidth to be able to change over time?

27 views Asked by Tong Su At 21 September 2023 at 22:29

score 21 · Answer 7 · 2023-09-12T03:57:18.577000

Why don’t current tools support collecting memory bandwidth usage data at process granularity?

21 views Asked by Frontier_Setter At 12 September 2023 at 03:57

score 56 · Answer 8 · 2023-09-08T13:19:10.813000

How do different monitoring tools calculate memory bandwidth?

56 views Asked by Frontier_Setter At 08 September 2023 at 13:19

score 105 · Answer 9 · 2023-08-13T01:26:59.027000

Workload Memory Bandwidth Comparison Inconsistency

105 views Asked by TheAhmad At 13 August 2023 at 01:26

score 74 · Answer 10 · 2023-08-07T09:35:33.287000

Not getting any cache-pollution benefit from PREFETCHNTA on Zen 3

74 views Asked by Bruce Merry At 07 August 2023 at 09:35

score 189 · Answer 11 · 2023-08-01T12:04:36.117000

How to test the “random access bandwidth" of memory?

189 views Asked by Frontier_Setter At 01 August 2023 at 12:04

score 132 · Answer 12 · 2023-05-08T05:15:32.343000

How to calculate the theoretical max UPI bandwidth of a Linux dual-socket machine?

132 views Asked by Frontier_Setter At 08 May 2023 at 05:15

score 199 · Answer 13 · 2022-11-10T17:41:21.443000

Analysing performance of transpose function

199 views Asked by Nitin Malapally At 10 November 2022 at 17:41

score 70 · Answer 14 · 2022-09-16T22:08:44.707000

Detecting maximum memory bandwidth at kernel level

70 views Asked by Mohammad Siavashi At 16 September 2022 at 22:08

score 98 · Answer 15 · 2022-08-29T18:40:46.403000

Question about bandwidth ceilings in roofline models

98 views Asked by gasoon At 29 August 2022 at 18:40

score 176 · Answer 16 · 2022-08-13T08:57:37.790000

Can hardware threads access main memory at the same time?

176 views Asked by Samuel Squire At 13 August 2022 at 08:57

score 477 · Answer 17 · 2022-07-19T00:29:58.933000

Can all of L2/L3 cache be used by data? If so, why does the Graviton 3 bandwidth plot drop off after half the L2/L3 size, but only gradually?

477 views Asked by MWB At 19 July 2022 at 00:29

score 304 · Answer 18 · 2022-06-27T12:33:27.073000

Memory throughput for strided memory accesses

304 views Asked by Bogi At 27 June 2022 at 12:33

score 1206 · Answer 19 · 2022-06-13T03:36:41.913000

How to calculate the L3 cache bandwidth by using the performance counters linux?

1.2k views Asked by Kailash gogineni At 13 June 2022 at 03:36

score 388 · Answer 20 · 2022-03-17T15:31:42.540000

Achieve maximum bandwidth on arm64

388 views Asked by Milan At 17 March 2022 at 15:31

TechQA.

List Question

Why does memory latency increase significantly before reaching the memory bandwidth limit?

Simple streaming loop shows higher effective B/W than DRAM B/W for small enough problems

There is a huge speed difference between reading and writing in DRAM, is this normal?

memory bandwidth of convolutional layer: numbers calculations

Why using non-temporal store instructions cannot reduce memory bandwidth usage? (Writes seem to be generating extra reads)

Why wide demux allows the partitioning of memory bandwidth to be able to change over time?

Why don’t current tools support collecting memory bandwidth usage data at process granularity?

How do different monitoring tools calculate memory bandwidth?

Workload Memory Bandwidth Comparison Inconsistency

Not getting any cache-pollution benefit from PREFETCHNTA on Zen 3

How to test the “random access bandwidth" of memory?

How to calculate the theoretical max UPI bandwidth of a Linux dual-socket machine?

Analysing performance of transpose function

Detecting maximum memory bandwidth at kernel level

Question about bandwidth ceilings in roofline models

Can hardware threads access main memory at the same time?

Can all of L2/L3 cache be used by data? If so, why does the Graviton 3 bandwidth plot drop off after half the L2/L3 size, but only gradually?

Memory throughput for strided memory accesses

How to calculate the L3 cache bandwidth by using the performance counters linux?

Achieve maximum bandwidth on arm64

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