why your guess? "st.global.L1::no_allocate" that doesn't mean L2 won't be allocated cache.

[zzJingHong]

// st.global.L1::no_allocate will be translated into ST.E.NA.[width] in SASS,
// which does not have cache allocation (obviously in L1, I guess not in L2 too)
#ifndef DISABLE_AGGRESSIVE_PTX_INSTRS
#define ST_NA_FUNC "st.global.L1::no_allocate"
#else
#define ST_NA_FUNC "st.global"
#endif

[LyricZhao]

Sorry, the comment is somehow misleading: here, I'm guessing the "NA" in ST.E.NA not the PTX. Will update related docs later.