vchiq_2835_arm: Implement a DMA pool for small bulk transfers #2699
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During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
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Thank you! |
popcornmix
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Oct 2, 2018
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
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Oct 2, 2018
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
nathanchance
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Oct 2, 2018
* upstream/rpi-4.14.y: vchiq_2835_arm: Implement a DMA pool for small bulk transfers (raspberrypi#2699) Revert "ASoC: cs4265: SOC_SINGLE register value error fix" Signed-off-by: Nathan Chancellor <[email protected]> Conflicts: sound/soc/codecs/cs4265.c
pelwell
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in detule/linux
Oct 3, 2018
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE.
popcornmix
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that referenced
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Oct 8, 2018
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
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Oct 8, 2018
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
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Oct 15, 2018
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
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Oct 15, 2018
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
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Oct 22, 2018
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
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Oct 22, 2018
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
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Nov 4, 2018
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
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Nov 4, 2018
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
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@detule Are you interested in upstreaming your patch? In case you are not familiar with the procedure you can contact me: [email protected] |
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Thanks for reaching out - definitely interested; will contact you. |
popcornmix
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Nov 12, 2018
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
this pull request
Nov 12, 2018
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
this pull request
Nov 12, 2018
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
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Nov 13, 2018
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
this pull request
Nov 15, 2018
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
this pull request
Nov 15, 2018
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
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Nov 19, 2018
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
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Nov 21, 2018
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
this pull request
Nov 21, 2018
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
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Jun 8, 2021
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
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that referenced
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Jun 14, 2021
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
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Jul 9, 2021
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
this pull request
Jul 9, 2021
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
this pull request
Jul 15, 2021
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
this pull request
Jul 15, 2021
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
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Jul 21, 2021
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
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Jul 21, 2021
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
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Jul 27, 2021
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
this pull request
Jul 27, 2021
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
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Jul 27, 2021
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
pelwell
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Jul 29, 2021
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
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Aug 11, 2021
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
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Aug 11, 2021
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
Noltari
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Aug 20, 2021
…rrypi#2699) During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
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Aug 21, 2021
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
this pull request
Aug 21, 2021
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
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Sep 8, 2021
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
this pull request
Sep 8, 2021
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
this pull request
Sep 15, 2021
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
this pull request
Sep 15, 2021
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
this pull request
Sep 15, 2021
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
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Sep 30, 2021
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
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Sep 30, 2021
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
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Oct 13, 2021
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
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Oct 19, 2021
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
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Oct 22, 2021
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
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Nov 8, 2021
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
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Nov 15, 2021
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
popcornmix
pushed a commit
that referenced
this pull request
Nov 29, 2021
During a bulk transfer we request a DMA allocation to hold the scatter-gather list. Most of the time, this allocation is small (<< PAGE_SIZE), however it can be requested at a high enough frequency to cause fragmentation and/or stress the CMA allocator (think time spent in compaction here, or during allocations elsewhere). Implement a pool to serve up small DMA allocations, falling back to a coherent allocation if the request is greater than VCHIQ_DMA_POOL_SIZE. Signed-off-by: Oliver Gjoneski <[email protected]>
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An attempt to address #2680 by using a DMA pool for small allocations during bulk transfers.
Thanks to @pelwell and @lategoodbye for reviewing V1 of this patch.