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WOW64; rv:52.0) Gecko/20100101 > Thunderbird/52.5.0 > > Hi Jerin Hi Jia. > > Ok > > And I wonder why you haven't met such problem (all rd_tsc() is 0)in your > test platform? > > Did you use an old kernel (older than v4.5-rc1)? I am using 4.9 kernel base.