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vulkan_decode: halve execution pool size

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Determined experimentally, on various videos and hardware.
On Intel, using less resources in-flight is around 15% faster,
with similar results on Nvidia hardware.
This commit is contained in:
Lynne 2023-06-07 02:59:55 +02:00
parent 5f1be341c2
commit 24c4307b80
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1 changed files with 3 additions and 2 deletions
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5
libavcodec/vulkan_decode.c
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@ -1105,8 +1105,9 @@ int ff_vk_decode_init(AVCodecContext *avctx)
session_create.pVideoProfile = &prof->profile_list.pProfiles[0];
/* Create decode exec context.
* 4 async contexts per thread seems like a good number. */
err = ff_vk_exec_pool_init(s, &qf_dec, &ctx->exec_pool, 4*avctx->thread_count,
* 2 async contexts per thread was experimentally determined to be optimal
* for a majority of streams. */
err = ff_vk_exec_pool_init(s, &qf_dec, &ctx->exec_pool, 2*avctx->thread_count,
nb_q, VK_QUERY_TYPE_RESULT_STATUS_ONLY_KHR, 0,
session_create.pVideoProfile);
if (err < 0)