https://csp.vnoi.info/post/125-yoshi_fp36

typically mp2 is for dual compute units (actually each one has only 4 SP... so the metrics above are for MP2)

lossless is truly lossless

losslesshp is +10% perf for a slight file size increase

lossless is actually faster than x264 and x265 lossless mode while being more efficient

lossless corresponds to a quality level of -12 (q=-13), inaccessible through normal modes ([0...51]) i.e. effectively disable quantization. for x265 this is qp=4, x264 qp=0.

example:

frame=141336 fps= 78 q=-13.0 Lsize=439591079KiB time=01:38:14.88 bitrate=610890.2kbits/s speed=3.26x elapsed=0:30:08.07

losslesshp on the 4k 98min video gives you a 450gb file (about 20x vs the original) for a compression ratio of ~4.9:1

sau nhiều năm ở rank -3 hoặc thấp hơn, mình đã leo lên rank -2 rồi

cảm ơn các bạn

TIFFFFFFFFFFFFFFFFFF

[1]

so its that the 76? number comes from prrt+store queue (-1 for the extra cache miss load??). a73 can do at most 66 speculative reg writes in flight and 10 (or 11) indep stores. a73 automatically discard nops so any result that i measured is in some form useless.

(m1 has a ~330 entry coalesced rob for about 2300 nops and a 630 entry prrt)

cortex a73 "rob size" is > 76, if you max out the speculative intrf and fprf you only get ~70 instrs measurable, a73 automatically eliminate nops so we don't know what could be there, sorry for not able to measure things....

(i tried using the coalesced rob method but got nowhere)

probably 76 is equal to something like prrt+store buffer