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a061d97027
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109 lines
2.9 KiB
Bash
109 lines
2.9 KiB
Bash
# -*- tab-width: 4 -*- ;; Emacs
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# vi: set filetype=sh tabstop=8 shiftwidth=8 noexpandtab :: Vi/ViM
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############################################################ IDENT(1)
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#
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# $Title: dwatch(8) module for dtrace_sched(4) $
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# $Copyright: 2014-2018 Devin Teske. All rights reserved. $
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# $FreeBSD$
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#
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############################################################ DESCRIPTION
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#
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# Display CPU scheduling activity
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#
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############################################################ PROBE
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case "$PROFILE" in
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sched)
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: ${PROBE:=sched:::} ;;
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sched-cpu)
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: ${PROBE:=sched:::off-cpu, sched:::on-cpu, sched:::remain-cpu} ;;
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sched-exec)
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: ${PROBE:=sched:::sleep, sched:::wakeup} ;;
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sched-pri)
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: ${PROBE:=sched:::change-pri, sched:::lend-pri} ;;
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sched-queue)
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: ${PROBE:=sched:::dequeue, sched:::enqueue, sched:::load-change} ;;
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*)
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: ${PROBE:=sched:::${PROFILE#sched-}}
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esac
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############################################################ ACTIONS
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exec 9<<EOF
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this pid_t pid;
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this string args;
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this string details;
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this u_char curprio;
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$PROBE /* probe ID $ID */
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{${TRACE:+
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printf("<$ID>");}
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this->args = this->args0;
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this->details = "";
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this->pid = this->pid0;
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}
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sched:::change-pri, sched:::dequeue, sched:::enqueue,
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sched:::lend-pri, sched:::off-cpu, sched:::surrender,
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sched:::tick, sched:::wakeup /* probe ID $(( $ID + 1 )) */
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{${TRACE:+
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printf("<$(( $ID + 1 ))>");}
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this->curprio = (u_char)((struct thread *)args[0])->td_priority;
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$( pproc -P _sched "(struct proc *)args[1]" )
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this->args = this->args_sched;
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this->pid = this->pid_sched;
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}
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sched:::enqueue /* probe ID $(( $ID + 2 )) */
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{${TRACE:+
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printf("<$(( $ID + 2 ))>");}
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/* details = "head" or "tail" */
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this->details = (int)arg3 == 0 ? "tail" : "head";
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}
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sched:::change-pri, sched:::lend-pri /* probe ID $(( $ID + 3 )) */
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{${TRACE:+
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printf("<$(( $ID + 3 ))>");}
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/* details = "<curprio> -> <arg2>" */
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this->details = strjoin(lltostr(this->curprio),
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strjoin("->", lltostr((uint8_t)arg2)));
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}
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sched:::load-change /* probe ID $(( $ID + 4 )) */
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{${TRACE:+
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printf("<$(( $ID + 4 ))>");}
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/* details = "CPU<arg0> queue <arg1>" */
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this->details = strjoin(strjoin("CPU", lltostr((int)arg0)),
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strjoin(" queue ", lltostr((int)arg1)));
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}
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$PROBE /* probe ID $(( $ID + 5 )) */
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{${TRACE:+
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printf("<$(( $ID + 5 ))>");}
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/* details += " pid <pid> -- <proc args of pid>" */
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this->details = strjoin(this->details, this->details == "" ? "" : " ");
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this->details = strjoin(this->details, strjoin(
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strjoin("pid ", lltostr(this->pid)),
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strjoin(" -- ", this->args)));
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}
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EOF
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ACTIONS=$( cat <&9 )
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ID=$(( $ID + 6 ))
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############################################################ EVENT DETAILS
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if [ ! "$CUSTOM_DETAILS" ]; then
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exec 9<<EOF
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/*
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* Print scheduling details
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*/
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printf("%s %s", probename, this->details);
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EOF
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EVENT_DETAILS=$( cat <&9 )
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fi
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################################################################################
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# END
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################################################################################
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