tapset::iosched(3stap)

1TAPSET::IOSCHED(3stap)                                  TAPSET::IOSCHED(3stap)
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NAME

6       tapset::iosched - systemtap IO scheduler probe points
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DESCRIPTION

11       This  family  of probe points is used to probe the IO scheduler activi‐
12       ties.  It contains the following probe points:
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15       ioscheduler.elv_next_request
16              Fires when retrieves a request from request queue
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18              Arguments:
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20              elevator_name
21                The elevator name
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24       ioscheduler.elv_next_request.return
25              Fires when return from retrieving a request
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27              Arguments:
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29              req
30                Address of the request
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32              req_flags
33                request flags
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35              disk_major
36                disk major number of the request
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38              disk_minor
39                disk minor number of the request
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42       ioscheduler.elv_add_request
43              Fires when add a request into request queue
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45              Arguments:
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47              elevator_name
48                The elevator name
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50              req
51                Address of the request
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53              req_flags
54                request flags
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56              disk_major
57                disk major number of the request
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59              disk_minor
60                disk minor number of the request
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63       ioscheduler.elv_completed_request
64              Fires when a request is completed
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66              Arguments:
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68              elevator_name
69                The elevator name
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71              req
72                Address of the request
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74              req_flags
75                request flags
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77              disk_major
78                disk major number of the request
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80              disk_minor
81                disk minor number of the request
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NAME

DESCRIPTION

SEE ALSO