815 lines
24 KiB
C
815 lines
24 KiB
C
#undef TRACE_SYSTEM
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#define TRACE_SYSTEM rcu
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#if !defined(_TRACE_RCU_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_RCU_H
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#include <linux/tracepoint.h>
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/*
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* Tracepoint for start/end markers used for utilization calculations.
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* By convention, the string is of the following forms:
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*
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* "Start <activity>" -- Mark the start of the specified activity,
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* such as "context switch". Nesting is permitted.
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* "End <activity>" -- Mark the end of the specified activity.
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*
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* An "@" character within "<activity>" is a comment character: Data
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* reduction scripts will ignore the "@" and the remainder of the line.
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*/
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TRACE_EVENT(rcu_utilization,
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TP_PROTO(const char *s),
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TP_ARGS(s),
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TP_STRUCT__entry(
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__field(const char *, s)
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),
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TP_fast_assign(
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__entry->s = s;
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),
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TP_printk("%s", __entry->s)
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);
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#ifdef CONFIG_RCU_TRACE
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#if defined(CONFIG_TREE_RCU) || defined(CONFIG_PREEMPT_RCU)
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/*
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* Tracepoint for grace-period events. Takes a string identifying the
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* RCU flavor, the grace-period number, and a string identifying the
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* grace-period-related event as follows:
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*
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* "AccReadyCB": CPU acclerates new callbacks to RCU_NEXT_READY_TAIL.
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* "AccWaitCB": CPU accelerates new callbacks to RCU_WAIT_TAIL.
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* "newreq": Request a new grace period.
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* "start": Start a grace period.
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* "cpustart": CPU first notices a grace-period start.
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* "cpuqs": CPU passes through a quiescent state.
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* "cpuonl": CPU comes online.
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* "cpuofl": CPU goes offline.
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* "reqwait": GP kthread sleeps waiting for grace-period request.
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* "reqwaitsig": GP kthread awakened by signal from reqwait state.
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* "fqswait": GP kthread waiting until time to force quiescent states.
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* "fqsstart": GP kthread starts forcing quiescent states.
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* "fqsend": GP kthread done forcing quiescent states.
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* "fqswaitsig": GP kthread awakened by signal from fqswait state.
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* "end": End a grace period.
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* "cpuend": CPU first notices a grace-period end.
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*/
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TRACE_EVENT(rcu_grace_period,
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TP_PROTO(const char *rcuname, unsigned long gpnum, const char *gpevent),
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TP_ARGS(rcuname, gpnum, gpevent),
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TP_STRUCT__entry(
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__field(const char *, rcuname)
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__field(unsigned long, gpnum)
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__field(const char *, gpevent)
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),
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TP_fast_assign(
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__entry->rcuname = rcuname;
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__entry->gpnum = gpnum;
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__entry->gpevent = gpevent;
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),
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TP_printk("%s %lu %s",
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__entry->rcuname, __entry->gpnum, __entry->gpevent)
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);
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/*
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* Tracepoint for future grace-period events, including those for no-callbacks
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* CPUs. The caller should pull the data from the rcu_node structure,
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* other than rcuname, which comes from the rcu_state structure, and event,
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* which is one of the following:
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*
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* "Startleaf": Request a nocb grace period based on leaf-node data.
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* "Startedleaf": Leaf-node start proved sufficient.
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* "Startedleafroot": Leaf-node start proved sufficient after checking root.
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* "Startedroot": Requested a nocb grace period based on root-node data.
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* "StartWait": Start waiting for the requested grace period.
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* "ResumeWait": Resume waiting after signal.
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* "EndWait": Complete wait.
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* "Cleanup": Clean up rcu_node structure after previous GP.
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* "CleanupMore": Clean up, and another no-CB GP is needed.
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*/
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TRACE_EVENT(rcu_future_grace_period,
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TP_PROTO(const char *rcuname, unsigned long gpnum, unsigned long completed,
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unsigned long c, u8 level, int grplo, int grphi,
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const char *gpevent),
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TP_ARGS(rcuname, gpnum, completed, c, level, grplo, grphi, gpevent),
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TP_STRUCT__entry(
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__field(const char *, rcuname)
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__field(unsigned long, gpnum)
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__field(unsigned long, completed)
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__field(unsigned long, c)
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__field(u8, level)
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__field(int, grplo)
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__field(int, grphi)
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__field(const char *, gpevent)
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),
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TP_fast_assign(
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__entry->rcuname = rcuname;
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__entry->gpnum = gpnum;
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__entry->completed = completed;
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__entry->c = c;
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__entry->level = level;
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__entry->grplo = grplo;
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__entry->grphi = grphi;
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__entry->gpevent = gpevent;
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),
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TP_printk("%s %lu %lu %lu %u %d %d %s",
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__entry->rcuname, __entry->gpnum, __entry->completed,
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__entry->c, __entry->level, __entry->grplo, __entry->grphi,
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__entry->gpevent)
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);
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/*
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* Tracepoint for grace-period-initialization events. These are
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* distinguished by the type of RCU, the new grace-period number, the
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* rcu_node structure level, the starting and ending CPU covered by the
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* rcu_node structure, and the mask of CPUs that will be waited for.
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* All but the type of RCU are extracted from the rcu_node structure.
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*/
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TRACE_EVENT(rcu_grace_period_init,
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TP_PROTO(const char *rcuname, unsigned long gpnum, u8 level,
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int grplo, int grphi, unsigned long qsmask),
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TP_ARGS(rcuname, gpnum, level, grplo, grphi, qsmask),
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TP_STRUCT__entry(
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__field(const char *, rcuname)
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__field(unsigned long, gpnum)
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__field(u8, level)
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__field(int, grplo)
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__field(int, grphi)
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__field(unsigned long, qsmask)
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),
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TP_fast_assign(
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__entry->rcuname = rcuname;
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__entry->gpnum = gpnum;
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__entry->level = level;
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__entry->grplo = grplo;
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__entry->grphi = grphi;
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__entry->qsmask = qsmask;
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),
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TP_printk("%s %lu %u %d %d %lx",
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__entry->rcuname, __entry->gpnum, __entry->level,
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__entry->grplo, __entry->grphi, __entry->qsmask)
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);
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/*
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* Tracepoint for expedited grace-period events. Takes a string identifying
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* the RCU flavor, the expedited grace-period sequence number, and a string
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* identifying the grace-period-related event as follows:
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*
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* "snap": Captured snapshot of expedited grace period sequence number.
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* "start": Started a real expedited grace period.
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* "end": Ended a real expedited grace period.
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* "endwake": Woke piggybackers up.
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* "done": Someone else did the expedited grace period for us.
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*/
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TRACE_EVENT(rcu_exp_grace_period,
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TP_PROTO(const char *rcuname, unsigned long gpseq, const char *gpevent),
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TP_ARGS(rcuname, gpseq, gpevent),
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TP_STRUCT__entry(
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__field(const char *, rcuname)
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__field(unsigned long, gpseq)
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__field(const char *, gpevent)
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),
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TP_fast_assign(
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__entry->rcuname = rcuname;
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__entry->gpseq = gpseq;
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__entry->gpevent = gpevent;
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),
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TP_printk("%s %lu %s",
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__entry->rcuname, __entry->gpseq, __entry->gpevent)
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);
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/*
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* Tracepoint for expedited grace-period funnel-locking events. Takes a
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* string identifying the RCU flavor, an integer identifying the rcu_node
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* combining-tree level, another pair of integers identifying the lowest-
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* and highest-numbered CPU associated with the current rcu_node structure,
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* and a string. identifying the grace-period-related event as follows:
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*
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* "nxtlvl": Advance to next level of rcu_node funnel
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* "wait": Wait for someone else to do expedited GP
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*/
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TRACE_EVENT(rcu_exp_funnel_lock,
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TP_PROTO(const char *rcuname, u8 level, int grplo, int grphi,
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const char *gpevent),
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TP_ARGS(rcuname, level, grplo, grphi, gpevent),
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TP_STRUCT__entry(
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__field(const char *, rcuname)
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__field(u8, level)
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__field(int, grplo)
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__field(int, grphi)
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__field(const char *, gpevent)
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),
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TP_fast_assign(
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__entry->rcuname = rcuname;
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__entry->level = level;
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__entry->grplo = grplo;
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__entry->grphi = grphi;
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__entry->gpevent = gpevent;
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),
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TP_printk("%s %d %d %d %s",
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__entry->rcuname, __entry->level, __entry->grplo,
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__entry->grphi, __entry->gpevent)
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);
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/*
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* Tracepoint for RCU no-CBs CPU callback handoffs. This event is intended
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* to assist debugging of these handoffs.
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*
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* The first argument is the name of the RCU flavor, and the second is
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* the number of the offloaded CPU are extracted. The third and final
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* argument is a string as follows:
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*
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* "WakeEmpty": Wake rcuo kthread, first CB to empty list.
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* "WakeEmptyIsDeferred": Wake rcuo kthread later, first CB to empty list.
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* "WakeOvf": Wake rcuo kthread, CB list is huge.
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* "WakeOvfIsDeferred": Wake rcuo kthread later, CB list is huge.
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* "WakeNot": Don't wake rcuo kthread.
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* "WakeNotPoll": Don't wake rcuo kthread because it is polling.
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* "DeferredWake": Carried out the "IsDeferred" wakeup.
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* "Poll": Start of new polling cycle for rcu_nocb_poll.
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* "Sleep": Sleep waiting for CBs for !rcu_nocb_poll.
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* "WokeEmpty": rcuo kthread woke to find empty list.
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* "WokeNonEmpty": rcuo kthread woke to find non-empty list.
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* "WaitQueue": Enqueue partially done, timed wait for it to complete.
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* "WokeQueue": Partial enqueue now complete.
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*/
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TRACE_EVENT(rcu_nocb_wake,
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TP_PROTO(const char *rcuname, int cpu, const char *reason),
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TP_ARGS(rcuname, cpu, reason),
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TP_STRUCT__entry(
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__field(const char *, rcuname)
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__field(int, cpu)
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__field(const char *, reason)
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),
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TP_fast_assign(
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__entry->rcuname = rcuname;
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__entry->cpu = cpu;
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__entry->reason = reason;
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),
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TP_printk("%s %d %s", __entry->rcuname, __entry->cpu, __entry->reason)
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);
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/*
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* Tracepoint for tasks blocking within preemptible-RCU read-side
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* critical sections. Track the type of RCU (which one day might
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* include SRCU), the grace-period number that the task is blocking
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* (the current or the next), and the task's PID.
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*/
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TRACE_EVENT(rcu_preempt_task,
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TP_PROTO(const char *rcuname, int pid, unsigned long gpnum),
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TP_ARGS(rcuname, pid, gpnum),
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TP_STRUCT__entry(
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__field(const char *, rcuname)
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__field(unsigned long, gpnum)
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__field(int, pid)
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),
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TP_fast_assign(
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__entry->rcuname = rcuname;
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__entry->gpnum = gpnum;
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__entry->pid = pid;
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),
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TP_printk("%s %lu %d",
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__entry->rcuname, __entry->gpnum, __entry->pid)
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);
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/*
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* Tracepoint for tasks that blocked within a given preemptible-RCU
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* read-side critical section exiting that critical section. Track the
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* type of RCU (which one day might include SRCU) and the task's PID.
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*/
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TRACE_EVENT(rcu_unlock_preempted_task,
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TP_PROTO(const char *rcuname, unsigned long gpnum, int pid),
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TP_ARGS(rcuname, gpnum, pid),
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TP_STRUCT__entry(
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__field(const char *, rcuname)
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__field(unsigned long, gpnum)
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__field(int, pid)
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),
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TP_fast_assign(
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__entry->rcuname = rcuname;
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__entry->gpnum = gpnum;
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__entry->pid = pid;
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),
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TP_printk("%s %lu %d", __entry->rcuname, __entry->gpnum, __entry->pid)
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);
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/*
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* Tracepoint for quiescent-state-reporting events. These are
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* distinguished by the type of RCU, the grace-period number, the
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* mask of quiescent lower-level entities, the rcu_node structure level,
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* the starting and ending CPU covered by the rcu_node structure, and
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* whether there are any blocked tasks blocking the current grace period.
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* All but the type of RCU are extracted from the rcu_node structure.
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*/
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TRACE_EVENT(rcu_quiescent_state_report,
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TP_PROTO(const char *rcuname, unsigned long gpnum,
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unsigned long mask, unsigned long qsmask,
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u8 level, int grplo, int grphi, int gp_tasks),
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TP_ARGS(rcuname, gpnum, mask, qsmask, level, grplo, grphi, gp_tasks),
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TP_STRUCT__entry(
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__field(const char *, rcuname)
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__field(unsigned long, gpnum)
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__field(unsigned long, mask)
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__field(unsigned long, qsmask)
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__field(u8, level)
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__field(int, grplo)
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__field(int, grphi)
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__field(u8, gp_tasks)
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),
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TP_fast_assign(
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__entry->rcuname = rcuname;
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__entry->gpnum = gpnum;
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__entry->mask = mask;
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__entry->qsmask = qsmask;
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__entry->level = level;
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__entry->grplo = grplo;
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__entry->grphi = grphi;
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__entry->gp_tasks = gp_tasks;
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),
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TP_printk("%s %lu %lx>%lx %u %d %d %u",
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__entry->rcuname, __entry->gpnum,
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__entry->mask, __entry->qsmask, __entry->level,
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__entry->grplo, __entry->grphi, __entry->gp_tasks)
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);
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/*
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* Tracepoint for quiescent states detected by force_quiescent_state().
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* These trace events include the type of RCU, the grace-period number
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* that was blocked by the CPU, the CPU itself, and the type of quiescent
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* state, which can be "dti" for dyntick-idle mode, "ofl" for CPU offline,
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* or "kick" when kicking a CPU that has been in dyntick-idle mode for
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* too long.
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*/
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TRACE_EVENT(rcu_fqs,
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TP_PROTO(const char *rcuname, unsigned long gpnum, int cpu, const char *qsevent),
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TP_ARGS(rcuname, gpnum, cpu, qsevent),
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TP_STRUCT__entry(
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__field(const char *, rcuname)
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__field(unsigned long, gpnum)
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__field(int, cpu)
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__field(const char *, qsevent)
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),
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TP_fast_assign(
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__entry->rcuname = rcuname;
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__entry->gpnum = gpnum;
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__entry->cpu = cpu;
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__entry->qsevent = qsevent;
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),
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TP_printk("%s %lu %d %s",
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__entry->rcuname, __entry->gpnum,
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__entry->cpu, __entry->qsevent)
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);
|
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|
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#endif /* #if defined(CONFIG_TREE_RCU) || defined(CONFIG_PREEMPT_RCU) */
|
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|
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/*
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* Tracepoint for dyntick-idle entry/exit events. These take a string
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* as argument: "Start" for entering dyntick-idle mode, "End" for
|
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* leaving it, "--=" for events moving towards idle, and "++=" for events
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* moving away from idle. "Error on entry: not idle task" and "Error on
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* exit: not idle task" indicate that a non-idle task is erroneously
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* toying with the idle loop.
|
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*
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* These events also take a pair of numbers, which indicate the nesting
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* depth before and after the event of interest. Note that task-related
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* events use the upper bits of each number, while interrupt-related
|
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* events use the lower bits.
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*/
|
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TRACE_EVENT(rcu_dyntick,
|
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|
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TP_PROTO(const char *polarity, long long oldnesting, long long newnesting),
|
|
|
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TP_ARGS(polarity, oldnesting, newnesting),
|
|
|
|
TP_STRUCT__entry(
|
|
__field(const char *, polarity)
|
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__field(long long, oldnesting)
|
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__field(long long, newnesting)
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),
|
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|
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TP_fast_assign(
|
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__entry->polarity = polarity;
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__entry->oldnesting = oldnesting;
|
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__entry->newnesting = newnesting;
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),
|
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TP_printk("%s %llx %llx", __entry->polarity,
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__entry->oldnesting, __entry->newnesting)
|
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);
|
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|
|
/*
|
|
* Tracepoint for RCU preparation for idle, the goal being to get RCU
|
|
* processing done so that the current CPU can shut off its scheduling
|
|
* clock and enter dyntick-idle mode. One way to accomplish this is
|
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* to drain all RCU callbacks from this CPU, and the other is to have
|
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* done everything RCU requires for the current grace period. In this
|
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* latter case, the CPU will be awakened at the end of the current grace
|
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* period in order to process the remainder of its callbacks.
|
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*
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* These tracepoints take a string as argument:
|
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*
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* "No callbacks": Nothing to do, no callbacks on this CPU.
|
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* "In holdoff": Nothing to do, holding off after unsuccessful attempt.
|
|
* "Begin holdoff": Attempt failed, don't retry until next jiffy.
|
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* "Dyntick with callbacks": Entering dyntick-idle despite callbacks.
|
|
* "Dyntick with lazy callbacks": Entering dyntick-idle w/lazy callbacks.
|
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* "More callbacks": Still more callbacks, try again to clear them out.
|
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* "Callbacks drained": All callbacks processed, off to dyntick idle!
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* "Timer": Timer fired to cause CPU to continue processing callbacks.
|
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* "Demigrate": Timer fired on wrong CPU, woke up correct CPU.
|
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* "Cleanup after idle": Idle exited, timer canceled.
|
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*/
|
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TRACE_EVENT(rcu_prep_idle,
|
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|
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TP_PROTO(const char *reason),
|
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|
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TP_ARGS(reason),
|
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|
|
TP_STRUCT__entry(
|
|
__field(const char *, reason)
|
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),
|
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|
|
TP_fast_assign(
|
|
__entry->reason = reason;
|
|
),
|
|
|
|
TP_printk("%s", __entry->reason)
|
|
);
|
|
|
|
/*
|
|
* Tracepoint for the registration of a single RCU callback function.
|
|
* The first argument is the type of RCU, the second argument is
|
|
* a pointer to the RCU callback itself, the third element is the
|
|
* number of lazy callbacks queued, and the fourth element is the
|
|
* total number of callbacks queued.
|
|
*/
|
|
TRACE_EVENT(rcu_callback,
|
|
|
|
TP_PROTO(const char *rcuname, struct rcu_head *rhp, long qlen_lazy,
|
|
long qlen),
|
|
|
|
TP_ARGS(rcuname, rhp, qlen_lazy, qlen),
|
|
|
|
TP_STRUCT__entry(
|
|
__field(const char *, rcuname)
|
|
__field(void *, rhp)
|
|
__field(void *, func)
|
|
__field(long, qlen_lazy)
|
|
__field(long, qlen)
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->rcuname = rcuname;
|
|
__entry->rhp = rhp;
|
|
__entry->func = rhp->func;
|
|
__entry->qlen_lazy = qlen_lazy;
|
|
__entry->qlen = qlen;
|
|
),
|
|
|
|
TP_printk("%s rhp=%p func=%pf %ld/%ld",
|
|
__entry->rcuname, __entry->rhp, __entry->func,
|
|
__entry->qlen_lazy, __entry->qlen)
|
|
);
|
|
|
|
/*
|
|
* Tracepoint for the registration of a single RCU callback of the special
|
|
* kfree() form. The first argument is the RCU type, the second argument
|
|
* is a pointer to the RCU callback, the third argument is the offset
|
|
* of the callback within the enclosing RCU-protected data structure,
|
|
* the fourth argument is the number of lazy callbacks queued, and the
|
|
* fifth argument is the total number of callbacks queued.
|
|
*/
|
|
TRACE_EVENT(rcu_kfree_callback,
|
|
|
|
TP_PROTO(const char *rcuname, struct rcu_head *rhp, unsigned long offset,
|
|
long qlen_lazy, long qlen),
|
|
|
|
TP_ARGS(rcuname, rhp, offset, qlen_lazy, qlen),
|
|
|
|
TP_STRUCT__entry(
|
|
__field(const char *, rcuname)
|
|
__field(void *, rhp)
|
|
__field(unsigned long, offset)
|
|
__field(long, qlen_lazy)
|
|
__field(long, qlen)
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->rcuname = rcuname;
|
|
__entry->rhp = rhp;
|
|
__entry->offset = offset;
|
|
__entry->qlen_lazy = qlen_lazy;
|
|
__entry->qlen = qlen;
|
|
),
|
|
|
|
TP_printk("%s rhp=%p func=%ld %ld/%ld",
|
|
__entry->rcuname, __entry->rhp, __entry->offset,
|
|
__entry->qlen_lazy, __entry->qlen)
|
|
);
|
|
|
|
/*
|
|
* Tracepoint for marking the beginning rcu_do_batch, performed to start
|
|
* RCU callback invocation. The first argument is the RCU flavor,
|
|
* the second is the number of lazy callbacks queued, the third is
|
|
* the total number of callbacks queued, and the fourth argument is
|
|
* the current RCU-callback batch limit.
|
|
*/
|
|
TRACE_EVENT(rcu_batch_start,
|
|
|
|
TP_PROTO(const char *rcuname, long qlen_lazy, long qlen, long blimit),
|
|
|
|
TP_ARGS(rcuname, qlen_lazy, qlen, blimit),
|
|
|
|
TP_STRUCT__entry(
|
|
__field(const char *, rcuname)
|
|
__field(long, qlen_lazy)
|
|
__field(long, qlen)
|
|
__field(long, blimit)
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->rcuname = rcuname;
|
|
__entry->qlen_lazy = qlen_lazy;
|
|
__entry->qlen = qlen;
|
|
__entry->blimit = blimit;
|
|
),
|
|
|
|
TP_printk("%s CBs=%ld/%ld bl=%ld",
|
|
__entry->rcuname, __entry->qlen_lazy, __entry->qlen,
|
|
__entry->blimit)
|
|
);
|
|
|
|
/*
|
|
* Tracepoint for the invocation of a single RCU callback function.
|
|
* The first argument is the type of RCU, and the second argument is
|
|
* a pointer to the RCU callback itself.
|
|
*/
|
|
TRACE_EVENT(rcu_invoke_callback,
|
|
|
|
TP_PROTO(const char *rcuname, struct rcu_head *rhp),
|
|
|
|
TP_ARGS(rcuname, rhp),
|
|
|
|
TP_STRUCT__entry(
|
|
__field(const char *, rcuname)
|
|
__field(void *, rhp)
|
|
__field(void *, func)
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->rcuname = rcuname;
|
|
__entry->rhp = rhp;
|
|
__entry->func = rhp->func;
|
|
),
|
|
|
|
TP_printk("%s rhp=%p func=%pf",
|
|
__entry->rcuname, __entry->rhp, __entry->func)
|
|
);
|
|
|
|
/*
|
|
* Tracepoint for the invocation of a single RCU callback of the special
|
|
* kfree() form. The first argument is the RCU flavor, the second
|
|
* argument is a pointer to the RCU callback, and the third argument
|
|
* is the offset of the callback within the enclosing RCU-protected
|
|
* data structure.
|
|
*/
|
|
TRACE_EVENT(rcu_invoke_kfree_callback,
|
|
|
|
TP_PROTO(const char *rcuname, struct rcu_head *rhp, unsigned long offset),
|
|
|
|
TP_ARGS(rcuname, rhp, offset),
|
|
|
|
TP_STRUCT__entry(
|
|
__field(const char *, rcuname)
|
|
__field(void *, rhp)
|
|
__field(unsigned long, offset)
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->rcuname = rcuname;
|
|
__entry->rhp = rhp;
|
|
__entry->offset = offset;
|
|
),
|
|
|
|
TP_printk("%s rhp=%p func=%ld",
|
|
__entry->rcuname, __entry->rhp, __entry->offset)
|
|
);
|
|
|
|
/*
|
|
* Tracepoint for exiting rcu_do_batch after RCU callbacks have been
|
|
* invoked. The first argument is the name of the RCU flavor,
|
|
* the second argument is number of callbacks actually invoked,
|
|
* the third argument (cb) is whether or not any of the callbacks that
|
|
* were ready to invoke at the beginning of this batch are still
|
|
* queued, the fourth argument (nr) is the return value of need_resched(),
|
|
* the fifth argument (iit) is 1 if the current task is the idle task,
|
|
* and the sixth argument (risk) is the return value from
|
|
* rcu_is_callbacks_kthread().
|
|
*/
|
|
TRACE_EVENT(rcu_batch_end,
|
|
|
|
TP_PROTO(const char *rcuname, int callbacks_invoked,
|
|
char cb, char nr, char iit, char risk),
|
|
|
|
TP_ARGS(rcuname, callbacks_invoked, cb, nr, iit, risk),
|
|
|
|
TP_STRUCT__entry(
|
|
__field(const char *, rcuname)
|
|
__field(int, callbacks_invoked)
|
|
__field(char, cb)
|
|
__field(char, nr)
|
|
__field(char, iit)
|
|
__field(char, risk)
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->rcuname = rcuname;
|
|
__entry->callbacks_invoked = callbacks_invoked;
|
|
__entry->cb = cb;
|
|
__entry->nr = nr;
|
|
__entry->iit = iit;
|
|
__entry->risk = risk;
|
|
),
|
|
|
|
TP_printk("%s CBs-invoked=%d idle=%c%c%c%c",
|
|
__entry->rcuname, __entry->callbacks_invoked,
|
|
__entry->cb ? 'C' : '.',
|
|
__entry->nr ? 'S' : '.',
|
|
__entry->iit ? 'I' : '.',
|
|
__entry->risk ? 'R' : '.')
|
|
);
|
|
|
|
/*
|
|
* Tracepoint for rcutorture readers. The first argument is the name
|
|
* of the RCU flavor from rcutorture's viewpoint and the second argument
|
|
* is the callback address.
|
|
*/
|
|
TRACE_EVENT(rcu_torture_read,
|
|
|
|
TP_PROTO(const char *rcutorturename, struct rcu_head *rhp,
|
|
unsigned long secs, unsigned long c_old, unsigned long c),
|
|
|
|
TP_ARGS(rcutorturename, rhp, secs, c_old, c),
|
|
|
|
TP_STRUCT__entry(
|
|
__field(const char *, rcutorturename)
|
|
__field(struct rcu_head *, rhp)
|
|
__field(unsigned long, secs)
|
|
__field(unsigned long, c_old)
|
|
__field(unsigned long, c)
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->rcutorturename = rcutorturename;
|
|
__entry->rhp = rhp;
|
|
__entry->secs = secs;
|
|
__entry->c_old = c_old;
|
|
__entry->c = c;
|
|
),
|
|
|
|
TP_printk("%s torture read %p %luus c: %lu %lu",
|
|
__entry->rcutorturename, __entry->rhp,
|
|
__entry->secs, __entry->c_old, __entry->c)
|
|
);
|
|
|
|
/*
|
|
* Tracepoint for _rcu_barrier() execution. The string "s" describes
|
|
* the _rcu_barrier phase:
|
|
* "Begin": _rcu_barrier() started.
|
|
* "EarlyExit": _rcu_barrier() piggybacked, thus early exit.
|
|
* "Inc1": _rcu_barrier() piggyback check counter incremented.
|
|
* "OfflineNoCB": _rcu_barrier() found callback on never-online CPU
|
|
* "OnlineNoCB": _rcu_barrier() found online no-CBs CPU.
|
|
* "OnlineQ": _rcu_barrier() found online CPU with callbacks.
|
|
* "OnlineNQ": _rcu_barrier() found online CPU, no callbacks.
|
|
* "IRQ": An rcu_barrier_callback() callback posted on remote CPU.
|
|
* "CB": An rcu_barrier_callback() invoked a callback, not the last.
|
|
* "LastCB": An rcu_barrier_callback() invoked the last callback.
|
|
* "Inc2": _rcu_barrier() piggyback check counter incremented.
|
|
* The "cpu" argument is the CPU or -1 if meaningless, the "cnt" argument
|
|
* is the count of remaining callbacks, and "done" is the piggybacking count.
|
|
*/
|
|
TRACE_EVENT(rcu_barrier,
|
|
|
|
TP_PROTO(const char *rcuname, const char *s, int cpu, int cnt, unsigned long done),
|
|
|
|
TP_ARGS(rcuname, s, cpu, cnt, done),
|
|
|
|
TP_STRUCT__entry(
|
|
__field(const char *, rcuname)
|
|
__field(const char *, s)
|
|
__field(int, cpu)
|
|
__field(int, cnt)
|
|
__field(unsigned long, done)
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->rcuname = rcuname;
|
|
__entry->s = s;
|
|
__entry->cpu = cpu;
|
|
__entry->cnt = cnt;
|
|
__entry->done = done;
|
|
),
|
|
|
|
TP_printk("%s %s cpu %d remaining %d # %lu",
|
|
__entry->rcuname, __entry->s, __entry->cpu, __entry->cnt,
|
|
__entry->done)
|
|
);
|
|
|
|
#else /* #ifdef CONFIG_RCU_TRACE */
|
|
|
|
#define trace_rcu_grace_period(rcuname, gpnum, gpevent) do { } while (0)
|
|
#define trace_rcu_future_grace_period(rcuname, gpnum, completed, c, \
|
|
level, grplo, grphi, event) \
|
|
do { } while (0)
|
|
#define trace_rcu_grace_period_init(rcuname, gpnum, level, grplo, grphi, \
|
|
qsmask) do { } while (0)
|
|
#define trace_rcu_exp_grace_period(rcuname, gqseq, gpevent) \
|
|
do { } while (0)
|
|
#define trace_rcu_exp_funnel_lock(rcuname, level, grplo, grphi, gpevent) \
|
|
do { } while (0)
|
|
#define trace_rcu_nocb_wake(rcuname, cpu, reason) do { } while (0)
|
|
#define trace_rcu_preempt_task(rcuname, pid, gpnum) do { } while (0)
|
|
#define trace_rcu_unlock_preempted_task(rcuname, gpnum, pid) do { } while (0)
|
|
#define trace_rcu_quiescent_state_report(rcuname, gpnum, mask, qsmask, level, \
|
|
grplo, grphi, gp_tasks) do { } \
|
|
while (0)
|
|
#define trace_rcu_fqs(rcuname, gpnum, cpu, qsevent) do { } while (0)
|
|
#define trace_rcu_dyntick(polarity, oldnesting, newnesting) do { } while (0)
|
|
#define trace_rcu_prep_idle(reason) do { } while (0)
|
|
#define trace_rcu_callback(rcuname, rhp, qlen_lazy, qlen) do { } while (0)
|
|
#define trace_rcu_kfree_callback(rcuname, rhp, offset, qlen_lazy, qlen) \
|
|
do { } while (0)
|
|
#define trace_rcu_batch_start(rcuname, qlen_lazy, qlen, blimit) \
|
|
do { } while (0)
|
|
#define trace_rcu_invoke_callback(rcuname, rhp) do { } while (0)
|
|
#define trace_rcu_invoke_kfree_callback(rcuname, rhp, offset) do { } while (0)
|
|
#define trace_rcu_batch_end(rcuname, callbacks_invoked, cb, nr, iit, risk) \
|
|
do { } while (0)
|
|
#define trace_rcu_torture_read(rcutorturename, rhp, secs, c_old, c) \
|
|
do { } while (0)
|
|
#define trace_rcu_barrier(name, s, cpu, cnt, done) do { } while (0)
|
|
|
|
#endif /* #else #ifdef CONFIG_RCU_TRACE */
|
|
|
|
#endif /* _TRACE_RCU_H */
|
|
|
|
/* This part must be outside protection */
|
|
#include <trace/define_trace.h>
|