Add new types of KVM stats, linear and logarithmic histogram. Histogram are very useful for observing the value distribution of time or size related stats.
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| @@ -1965,7 +1965,9 @@ struct kvm_stats_header { · 1964 unmodified lines | ||
| 1965 | 1965 | #define KVM_STATS_TYPE_CUMULATIVE (0x0 << KVM_STATS_TYPE_SHIFT) |
| 1966 | 1966 | #define KVM_STATS_TYPE_INSTANT (0x1 << KVM_STATS_TYPE_SHIFT) |
| 1967 | 1967 | #define KVM_STATS_TYPE_PEAK (0x2 << KVM_STATS_TYPE_SHIFT) |
| 1968 | −#define KVM_STATS_TYPE_MAX KVM_STATS_TYPE_PEAK | |
| 1968 | +#define KVM_STATS_TYPE_LINEAR_HIST (0x3 << KVM_STATS_TYPE_SHIFT) | |
| 1969 | +#define KVM_STATS_TYPE_LOG_HIST (0x4 << KVM_STATS_TYPE_SHIFT) | |
| 1970 | +#define KVM_STATS_TYPE_MAX KVM_STATS_TYPE_LOG_HIST | |
| 1969 | 1971 | |
| 1970 | 1972 | #define KVM_STATS_UNIT_SHIFT 4 |
| 1971 | 1973 | #define KVM_STATS_UNIT_MASK (0xF << KVM_STATS_UNIT_SHIFT) |
| @@ -1988,8 +1990,9 @@ struct kvm_stats_header { · 16 unmodified lines | ||
| 1988 | 1990 | * @size: The number of data items for this stats. |
| 1989 | 1991 | * Every data item is of type __u64. |
| 1990 | 1992 | * @offset: The offset of the stats to the start of stat structure in |
| 1991 | − * struture kvm or kvm_vcpu. | |
| 1992 | − * @unused: Unused field for future usage. Always 0 for now. | |
| 1993 | + * structure kvm or kvm_vcpu. | |
| 1994 | + * @bucket_size: A parameter value used for histogram stats. It is only used | |
| 1995 | + * for linear histogram stats, specifying the size of the bucket; | |
| 1993 | 1996 | * @name: The name string for the stats. Its size is indicated by the |
| 1994 | 1997 | * &kvm_stats_header->name_size. |
| 1995 | 1998 | */ |
| @@ -1998,7 +2001,7 @@ struct kvm_stats_desc { · 2 unmodified lines | ||
| 1998 | 2001 | __s16 exponent; |
| 1999 | 2002 | __u16 size; |
| 2000 | 2003 | __u32 offset; |
| 2001 | − __u32 unused; | |
| 2004 | + __u32 bucket_size; | |
| 2002 | 2005 | char name[]; |
| 2003 | 2006 | }; |
| 2004 | 2007 | |