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| author | Lynne <dev@lynne.ee> | 2023-06-07 02:59:55 +0200 |
|---|---|---|
| committer | Lynne <dev@lynne.ee> | 2023-06-07 23:59:17 +0200 |
| commit | 24c4307b80785244d3def38a3787d6e76375f7b5 (patch) | |
| tree | add0b02847b97f348fe8e3ae97cc9e395ee3eda7 | |
| parent | 5f1be341c2bdc12f77c3209370144b15661a4958 (diff) | |
| download | ffmpeg-24c4307b80785244d3def38a3787d6e76375f7b5.tar.gz | |
vulkan_decode: halve execution pool size
Determined experimentally, on various videos and hardware.
On Intel, using less resources in-flight is around 15% faster,
with similar results on Nvidia hardware.
| -rw-r--r-- | libavcodec/vulkan_decode.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/libavcodec/vulkan_decode.c b/libavcodec/vulkan_decode.c index 889c67a15f..35e265a5b1 100644 --- a/libavcodec/vulkan_decode.c +++ b/libavcodec/vulkan_decode.c @@ -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) |