Function report |
Source Code:block\blk-iolatency.c |
Create Date:2022-07-28 17:45:12 |
Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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Annotation kernel can get tool activity | Download SCCT | Chinese |
Name:scale_amount
Proto:static inline unsigned long scale_amount(unsigned long qd, bool up)
Type:unsigned long
Parameter:
Type | Parameter | Name |
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unsigned long | qd | |
bool | up |
311 | Return max - return maximum of two values of the same or compatible types*@x: first value*@y: second value(up ? qd >> SCALE_UP_FACTOR : qd >> SCALE_DOWN_FACTOR, 1UL) |
Name | Describe |
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scale_cookie_change | We scale the qd down faster than we scale up, so we need to use this helper* to adjust the scale_cookie accordingly so we don't prematurely get* scale_cookie at DEFAULT_SCALE_COOKIE and unthrottle too much |
scale_change | Change the queue depth of the iolatency_grp. We add/subtract 1/16th of the* queue depth at a time so we don't get wild swings and hopefully dial in to* fairer distribution of the overall queue depth. |
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