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// Copyright (C) 2005, 2006 IBM Corp.
//
// This file is part of systemtap, and is free software. You can
// redistribute it and/or modify it under the terms of the GNU General
// Public License (GPL); either version 2, or (at your option) any
// later version.
probe addevent.ioscheduler
= addevent.ioscheduler.elv_next_request,
addevent.ioscheduler.elv_add_request,
addevent.ioscheduler.elv_completed_request
{}
probe addevent.ioscheduler.elv_next_request
= addevent.ioscheduler.elv_next_request.entry,
addevent.ioscheduler.elv_next_request.return
{}
%{
#include <linux/blkdev.h>
#include <linux/elevator.h>
%}
/* when a request is retrieved from request queue */
probe addevent.ioscheduler.elv_next_request.entry
+= _addevent.ioscheduler.elv_next_request.entry
{
update_record()
}
probe _addevent.ioscheduler.elv_next_request.entry
= ioscheduler.elv_next_request
{
log_ioscheduler_tracedata_elv_next_entry(elevator_name)
}
probe addevent.ioscheduler.elv_next_request.return
+= _addevent.ioscheduler.elv_next_request.return
{
update_record()
}
probe _addevent.ioscheduler.elv_next_request.return
= ioscheduler.elv_next_request.return
{
log_ioscheduler_tracedata_elv_next_return(disk_major, disk_minor, req, req_flags)
}
/* when a request is added to the request queue */
probe addevent.ioscheduler.elv_add_request
+= _addevent.ioscheduler.elv_add_request
{
update_record()
}
probe _addevent.ioscheduler.elv_add_request
= ioscheduler.elv_add_request
{
log_ioscheduler_tracedata_others(HOOKID_IOSCHED_ADD_REQ,
elevator_name, disk_major, disk_minor, req, req_flags)
}
/* when a request is completed */
probe addevent.ioscheduler.elv_completed_request
+= _addevent.ioscheduler.elv_completed_request
{
update_record()
}
probe _addevent.ioscheduler.elv_completed_request
= ioscheduler.elv_completed_request
{
log_ioscheduler_tracedata_others(HOOKID_IOSCHED_ADD_REQ,
elevator_name, disk_major, disk_minor, req, req_flags)
}
function log_ioscheduler_tracedata_others(var_id:long, elv_name:string, major:long,
minor:long, rq:long, flag:long)
%{
/* elevator name|major|minor|request|request_flags */
_lket_trace(_GROUP_IOSCHED, THIS->var_id, "%0s%1b%1b%8b%8b",
THIS->elv_name, THIS->major, THIS->minor, THIS->rq, THIS->flag);
%}
/* log the data specific to elv_next_request */
function log_ioscheduler_tracedata_elv_next_entry(elv_name:string)
%{
_lket_trace(_GROUP_IOSCHED, _HOOKID_IOSCHED_NEXT_REQ_ENTRY, "%0s", THIS->elv_name);
%}
function log_ioscheduler_tracedata_elv_next_return(major:long, minor:long, req:long, req_flags:long)
%{
_lket_trace(_GROUP_IOSCHED, _HOOKID_IOSCHED_NEXT_REQ_RETURN, "%1b%1b%8b%8b",
THIS->major, THIS->minor, THIS->req, THIS->req_flags);
%}
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