SYNOPSIS
struct cmbdata {
__u64 size;
__u64 elapsed_time;
__u64 ssch_rsch_count;
__u64 sample_count;
__u64 device_connect_time;
__u64 function_pending_time;
__u64 device_disconnect_time;
__u64 control_unit_queuing_time;
__u64 device_active_only_time;
__u64 device_busy_time;
__u64 initial_command_response_time;
};
MEMBERS
size
- size of the stored data
elapsed_time
- time since last sampling
ssch_rsch_count
- number of ssch and rsch
sample_count
- number of samples
device_connect_time
- time of device connect
function_pending_time
- time of function pending
device_disconnect_time
- time of device disconnect
control_unit_queuing_time
- time of control unit queuing
device_active_only_time
- time of device active only
device_busy_time
- time of device busy (ext. format)
initial_command_response_time
- initial command response time (ext. format)
DESCRIPTION
All values are stored as 64 bit for simplicity, especially in 32 bit emulation mode. All time values are normalized to nanoseconds. Currently, two formats are known, which differ by the size of this structure, i.e. the last two members are only set when the extended channel measurement facility (first shipped in z990 machines) is activated. Potentially, more fields could be added, which would result in a new ioctl number.
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