What is system/bin/rild ? It's always making CPU run at 1500

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http://forum.xda-developers.com – I am having high battery drain. With gsam I saw that my App usage is always more than 60% with kernel consuming the most. Around 50%.in set CPU I saw that my freq never goes below 1500. The time in state is all freq 0s except 1500. Then I installed system tuner. In task manager system section I saw that system/bin/rild taking 90%,of CPU. After killing that CPU freq is back to normal. Stays at 104 during sleep. CPU consumption is not always 100%. After few minutes kernel consumption came back to 15%. After a reboot kernel consumption of battery reaches 3%. But it jumps to the same state as befo (HowTos)