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DM: add a thread to monitor UOS ptdev intr status

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This patch is for "interrupt storm mitigation", used to reduce
the effect on SOS if an "interrupt storm" happens in UOS.

Add a monitor thread to get UOS pass-through devices interrupt
freqency data; currently, if "interrupt storm" happens, it'll
send a command to delay interrupt injection to UOS for some time.

The parameters: interrupt storm threshold and delay time can be
adjusted according differt HW configure and use case.

Tracked-On: #866
Signed-off-by: Minggui Cao <minggui.cao@intel.com>
Reviewed-by: Yin Fengwei <fengwei.yin@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
This commit is contained in:
Minggui Cao
2018-08-14 14:06:24 +08:00
committed by lijinxia
parent d123083fa9
commit 99ed5469ab
5 changed files with 184 additions and 0 deletions
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20
devicemodel/include/public/acrn_common.h
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@@ -455,6 +455,26 @@ enum pm_cmd_type {
PMCMD_GET_CX_DATA,
};
/**
* @brief Info to get a VM interrupt count data
*
* the parameter for HC_VM_INTR_MONITOR hypercall
*/
#define MAX_PTDEV_NUM 24
struct acrn_intr_monitor {
/** sub command for intr monitor */
uint32_t cmd;
/** the count of this buffer to save */
uint32_t buf_cnt;
/** the buffer which save each interrupt count */
uint64_t buffer[MAX_PTDEV_NUM * 2];
} __aligned(8);
/** cmd for intr monitor **/
#define INTR_CMD_GET_DATA 0
#define INTR_CMD_DELAY_INT 1
/**
* @}
*/