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2c92ca849f
With the rework of how the __string() handles dynamic strings where it
saves off the source string in field in the helper structure[1], the
assignment of that value to the trace event field is stored in the helper
value and does not need to be passed in again.
This means that with:
__string(field, mystring)
Which use to be assigned with __assign_str(field, mystring), no longer
needs the second parameter and it is unused. With this, __assign_str()
will now only get a single parameter.
There's over 700 users of __assign_str() and because coccinelle does not
handle the TRACE_EVENT() macro I ended up using the following sed script:
git grep -l __assign_str | while read a ; do
sed -e 's/\(__assign_str([^,]*[^ ,]\) *,[^;]*/\1)/' $a > /tmp/test-file;
mv /tmp/test-file $a;
done
I then searched for __assign_str() that did not end with ';' as those
were multi line assignments that the sed script above would fail to catch.
Note, the same updates will need to be done for:
__assign_str_len()
__assign_rel_str()
__assign_rel_str_len()
I tested this with both an allmodconfig and an allyesconfig (build only for both).
[1] https://lore.kernel.org/linux-trace-kernel/20240222211442.634192653@goodmis.org/
Link: https://lore.kernel.org/linux-trace-kernel/20240516133454.681ba6a0@rorschach.local.home
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Julia Lawall <Julia.Lawall@inria.fr>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Acked-by: Christian König <christian.koenig@amd.com> for the amdgpu parts.
Acked-by: Thomas Hellström <thomas.hellstrom@linux.intel.com> #for
Acked-by: Rafael J. Wysocki <rafael@kernel.org> # for thermal
Acked-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Darrick J. Wong <djwong@kernel.org> # xfs
Tested-by: Guenter Roeck <linux@roeck-us.net>
214 lines
4.7 KiB
C
214 lines
4.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM irq
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#if !defined(_TRACE_IRQ_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_IRQ_H
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#include <linux/tracepoint.h>
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struct irqaction;
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struct softirq_action;
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#define SOFTIRQ_NAME_LIST \
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softirq_name(HI) \
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softirq_name(TIMER) \
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softirq_name(NET_TX) \
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softirq_name(NET_RX) \
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softirq_name(BLOCK) \
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softirq_name(IRQ_POLL) \
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softirq_name(TASKLET) \
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softirq_name(SCHED) \
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softirq_name(HRTIMER) \
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softirq_name_end(RCU)
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#undef softirq_name
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#undef softirq_name_end
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#define softirq_name(sirq) TRACE_DEFINE_ENUM(sirq##_SOFTIRQ);
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#define softirq_name_end(sirq) TRACE_DEFINE_ENUM(sirq##_SOFTIRQ);
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SOFTIRQ_NAME_LIST
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#undef softirq_name
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#undef softirq_name_end
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#define softirq_name(sirq) { sirq##_SOFTIRQ, #sirq },
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#define softirq_name_end(sirq) { sirq##_SOFTIRQ, #sirq }
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#define show_softirq_name(val) \
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__print_symbolic(val, SOFTIRQ_NAME_LIST)
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/**
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* irq_handler_entry - called immediately before the irq action handler
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* @irq: irq number
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* @action: pointer to struct irqaction
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*
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* The struct irqaction pointed to by @action contains various
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* information about the handler, including the device name,
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* @action->name, and the device id, @action->dev_id. When used in
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* conjunction with the irq_handler_exit tracepoint, we can figure
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* out irq handler latencies.
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*/
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TRACE_EVENT(irq_handler_entry,
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TP_PROTO(int irq, struct irqaction *action),
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TP_ARGS(irq, action),
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TP_STRUCT__entry(
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__field( int, irq )
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__string( name, action->name )
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),
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TP_fast_assign(
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__entry->irq = irq;
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__assign_str(name);
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),
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TP_printk("irq=%d name=%s", __entry->irq, __get_str(name))
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);
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/**
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* irq_handler_exit - called immediately after the irq action handler returns
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* @irq: irq number
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* @action: pointer to struct irqaction
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* @ret: return value
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*
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* If the @ret value is set to IRQ_HANDLED, then we know that the corresponding
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* @action->handler successfully handled this irq. Otherwise, the irq might be
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* a shared irq line, or the irq was not handled successfully. Can be used in
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* conjunction with the irq_handler_entry to understand irq handler latencies.
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*/
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TRACE_EVENT(irq_handler_exit,
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TP_PROTO(int irq, struct irqaction *action, int ret),
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TP_ARGS(irq, action, ret),
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TP_STRUCT__entry(
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__field( int, irq )
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__field( int, ret )
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),
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TP_fast_assign(
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__entry->irq = irq;
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__entry->ret = ret;
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),
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TP_printk("irq=%d ret=%s",
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__entry->irq, __entry->ret ? "handled" : "unhandled")
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);
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DECLARE_EVENT_CLASS(softirq,
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TP_PROTO(unsigned int vec_nr),
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TP_ARGS(vec_nr),
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TP_STRUCT__entry(
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__field( unsigned int, vec )
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),
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TP_fast_assign(
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__entry->vec = vec_nr;
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),
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TP_printk("vec=%u [action=%s]", __entry->vec,
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show_softirq_name(__entry->vec))
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);
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/**
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* softirq_entry - called immediately before the softirq handler
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* @vec_nr: softirq vector number
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*
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* When used in combination with the softirq_exit tracepoint
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* we can determine the softirq handler routine.
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*/
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DEFINE_EVENT(softirq, softirq_entry,
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TP_PROTO(unsigned int vec_nr),
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TP_ARGS(vec_nr)
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);
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/**
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* softirq_exit - called immediately after the softirq handler returns
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* @vec_nr: softirq vector number
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*
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* When used in combination with the softirq_entry tracepoint
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* we can determine the softirq handler routine.
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*/
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DEFINE_EVENT(softirq, softirq_exit,
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TP_PROTO(unsigned int vec_nr),
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TP_ARGS(vec_nr)
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);
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/**
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* softirq_raise - called immediately when a softirq is raised
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* @vec_nr: softirq vector number
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*
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* When used in combination with the softirq_entry tracepoint
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* we can determine the softirq raise to run latency.
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*/
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DEFINE_EVENT(softirq, softirq_raise,
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TP_PROTO(unsigned int vec_nr),
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TP_ARGS(vec_nr)
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);
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DECLARE_EVENT_CLASS(tasklet,
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TP_PROTO(struct tasklet_struct *t, void *func),
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TP_ARGS(t, func),
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TP_STRUCT__entry(
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__field( void *, tasklet)
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__field( void *, func)
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),
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TP_fast_assign(
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__entry->tasklet = t;
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__entry->func = func;
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),
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TP_printk("tasklet=%ps function=%ps", __entry->tasklet, __entry->func)
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);
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/**
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* tasklet_entry - called immediately before the tasklet is run
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* @t: tasklet pointer
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* @func: tasklet callback or function being run
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*
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* Used to find individual tasklet execution time
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*/
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DEFINE_EVENT(tasklet, tasklet_entry,
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TP_PROTO(struct tasklet_struct *t, void *func),
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TP_ARGS(t, func)
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);
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/**
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* tasklet_exit - called immediately after the tasklet is run
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* @t: tasklet pointer
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* @func: tasklet callback or function being run
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*
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* Used to find individual tasklet execution time
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*/
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DEFINE_EVENT(tasklet, tasklet_exit,
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TP_PROTO(struct tasklet_struct *t, void *func),
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TP_ARGS(t, func)
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);
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#endif /* _TRACE_IRQ_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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