On Fri, 19 Oct 2007, Zoltan Menyhart wrote: > Can you please tell me what is the advantage of ".nta " on the store? > I far as I can see in the I2 Microarch. Guide, Table 3-2 Processor > Cache Hints, ".nta " on stores means: > - L2 NRU bit is not updated > - No slot is allocated in L3 The advantage is that the cacheline is pushed out faster to real memory which may save cacheline eviction if the lock has to be acquired by another processor. > In order to be able to take advantage of an "st.nta", you have to > use "ld.nta" in __clear_bit_unlock(), and at the bit lock > acquisition, too. Hmmm.. Yes this would make the function more complex to read. Maybe its not worth having the nta there. - To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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