Use Cache Hinting for fused_moe kernel

[wrmedford]

Forward compatible change with triton-lang/triton#6278. Benchmark below is for when it's merged.

Before

============ Serving Benchmark Result ============
Successful requests:                     500
Benchmark duration (s):                  116.83
Total input tokens:                      50000
Total generated tokens:                  500000
Request throughput (req/s):              4.28
Output token throughput (tok/s):         4279.83
Total Token throughput (tok/s):          4707.81
---------------Time to First Token----------------
Mean TTFT (ms):                          161.36
Median TTFT (ms):                        133.79
P99 TTFT (ms):                           1117.93
-----Time per Output Token (excl. 1st token)------
Mean TPOT (ms):                          72.26
Median TPOT (ms):                        72.86
P99 TPOT (ms):                           75.91
---------------Inter-token Latency----------------
Mean ITL (ms):                           72.19
Median ITL (ms):                         72.33
P99 ITL (ms):                            116.49
==================================================

After

============ Serving Benchmark Result ============
Successful requests:                     500
Benchmark duration (s):                  116.62
Total input tokens:                      50000
Total generated tokens:                  500000
Request throughput (req/s):              4.29
Output token throughput (tok/s):         4287.33
Total Token throughput (tok/s):          4716.07
---------------Time to First Token----------------
Mean TTFT (ms):                          141.31
Median TTFT (ms):                        131.75
P99 TTFT (ms):                           469.73
-----Time per Output Token (excl. 1st token)------
Mean TPOT (ms):                          71.41
Median TPOT (ms):                        72.11
P99 TPOT (ms):                           74.47
---------------Inter-token Latency----------------
Mean ITL (ms):                           71.34
Median ITL (ms):                         71.13
P99 ITL (ms):                            111.78
==================================================

Slight improvement, mostly in latency metrics.

Interface already exists, so this is safe to merge now.

Big thanks to @Apsu on all of the help here!

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[youkaichao]

@LucasWilkinson @bnellnm can you help review?

[LucasWilkinson]

Seems straight forward enough, this shouldn't cause any issue on non-Nvidia hardware? i.e. these parameters are just ignored right?

[bnellnm]

lgtm

[LucasWilkinson]

LGTM assuming:

this shouldn't cause any issue on non-Nvidia hardware? i.e. these parameters are just ignored right?

[wrmedford]

Seems straight forward enough, this shouldn't cause any issue on non-Nvidia hardware? i.e. these parameters are just ignored right?

Afaik these bindings have existed in triton for a while and it's up to the backend to implement them. Otherwise they're ignored.

[DefTruth]

The latest stable version of triton dont contains: triton-lang/triton#6278