[patch 13/52] genirq/matrix: Add tracepoints

Thomas Gleixner
2017-09-13T21:46:33Z

[-- Attachment #1: genirq-matrix--Add-tracepoints.patch --]
[-- Type: text/plain, Size: 8142 bytes --]

Add tracepoints for the irq bitmap matrix allocator.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
---
include/trace/events/irq_matrix.h | 201 ++++++++++++++++++++++++++++++++++++++
kernel/irq/matrix.c | 15 ++
2 files changed, 216 insertions(+)

--- /dev/null
+++ b/include/trace/events/irq_matrix.h
@@ -0,0 +1,201 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM irq_matrix
+
+#if !defined(_TRACE_IRQ_MATRIX_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_IRQ_MATRIX_H
+
+#include <linux/tracepoint.h>
+
+struct irq_matrix;
+struct cpumap;
+
+DECLARE_EVENT_CLASS(irq_matrix_global,
+
+ TP_PROTO(struct irq_matrix *matrix),
+
+ TP_ARGS(matrix),
+
+ TP_STRUCT__entry(
+ __field( unsigned int, online_maps )
+ __field( unsigned int, global_available )
+ __field( unsigned int, global_reserved )
+ __field( unsigned int, total_allocated )
+ ),
+
+ TP_fast_assign(
+ __entry->online_maps = matrix->online_maps;
+ __entry->global_available = matrix->global_available;
+ __entry->global_reserved = matrix->global_reserved;
+ __entry->total_allocated = matrix->total_allocated;
+ ),
+
+ TP_printk("online_maps=%d global_avl=%u, global_rsvd=%u, total_alloc=%u",
+ __entry->online_maps, __entry->global_available,
+ __entry->global_reserved, __entry->total_allocated)
+);
+
+DECLARE_EVENT_CLASS(irq_matrix_global_update,
+
+ TP_PROTO(int bit, struct irq_matrix *matrix),
+
+ TP_ARGS(bit, matrix),
+
+ TP_STRUCT__entry(
+ __field( int, bit )
+ __field( unsigned int, online_maps )
+ __field( unsigned int, global_available )
+ __field( unsigned int, global_reserved )
+ __field( unsigned int, total_allocated )
+ ),
+
+ TP_fast_assign(
+ __entry->bit = bit;
+ __entry->online_maps = matrix->online_maps;
+ __entry->global_available = matrix->global_available;
+ __entry->global_reserved = matrix->global_reserved;
+ __entry->total_allocated = matrix->total_allocated;
+ ),
+
+ TP_printk("bit=%d online_maps=%d global_avl=%u, global_rsvd=%u, total_alloc=%u",
+ __entry->bit, __entry->online_maps,
+ __entry->global_available, __entry->global_reserved,
+ __entry->total_allocated)
+);
+
+DECLARE_EVENT_CLASS(irq_matrix_cpu,
+
+ TP_PROTO(int bit, unsigned int cpu, struct irq_matrix *matrix,
+ struct cpumap *cmap),
+
+ TP_ARGS(bit, cpu, matrix, cmap),
+
+ TP_STRUCT__entry(
+ __field( int, bit )
+ __field( unsigned int, cpu )
+ __field( bool, online )
+ __field( unsigned int, available )
+ __field( unsigned int, allocated )
+ __field( unsigned int, managed )
+ __field( unsigned int, online_maps )
+ __field( unsigned int, global_available )
+ __field( unsigned int, global_reserved )
+ __field( unsigned int, total_allocated )
+ ),
+
+ TP_fast_assign(
+ __entry->bit = bit;
+ __entry->cpu = cpu;
+ __entry->online = cmap->online;
+ __entry->available = cmap->available;
+ __entry->allocated = cmap->allocated;
+ __entry->managed = cmap->managed;
+ __entry->online_maps = matrix->online_maps;
+ __entry->global_available = matrix->global_available;
+ __entry->global_reserved = matrix->global_reserved;
+ __entry->total_allocated = matrix->total_allocated;
+ ),
+
+ TP_printk("bit=%d cpu=%u online=%d avl=%u alloc=%u managed=%u online_maps=%u global_avl=%u, global_rsvd=%u, total_alloc=%u",
+ __entry->bit, __entry->cpu, __entry->online,
+ __entry->available, __entry->allocated,
+ __entry->managed, __entry->online_maps,
+ __entry->global_available, __entry->global_reserved,
+ __entry->total_allocated)
+);
+
+DEFINE_EVENT(irq_matrix_global, irq_matrix_online,
+
+ TP_PROTO(struct irq_matrix *matrix),
+
+ TP_ARGS(matrix)
+);
+
+DEFINE_EVENT(irq_matrix_global, irq_matrix_offline,
+
+ TP_PROTO(struct irq_matrix *matrix),
+
+ TP_ARGS(matrix)
+);
+
+DEFINE_EVENT(irq_matrix_global, irq_matrix_reserve,
+
+ TP_PROTO(struct irq_matrix *matrix),
+
+ TP_ARGS(matrix)
+);
+
+DEFINE_EVENT(irq_matrix_global, irq_matrix_remove_reserved,
+
+ TP_PROTO(struct irq_matrix *matrix),
+
+ TP_ARGS(matrix)
+);
+
+DEFINE_EVENT(irq_matrix_global_update, irq_matrix_assign_system,
+
+ TP_PROTO(int bit, struct irq_matrix *matrix),
+
+ TP_ARGS(bit, matrix)
+);
+
+DEFINE_EVENT(irq_matrix_cpu, irq_matrix_alloc_reserved,
+
+ TP_PROTO(int bit, unsigned int cpu,
+ struct irq_matrix *matrix, struct cpumap *cmap),
+
+ TP_ARGS(bit, cpu, matrix, cmap)
+);
+
+DEFINE_EVENT(irq_matrix_cpu, irq_matrix_reserve_managed,
+
+ TP_PROTO(int bit, unsigned int cpu,
+ struct irq_matrix *matrix, struct cpumap *cmap),
+
+ TP_ARGS(bit, cpu, matrix, cmap)
+);
+
+DEFINE_EVENT(irq_matrix_cpu, irq_matrix_remove_managed,
+
+ TP_PROTO(int bit, unsigned int cpu,
+ struct irq_matrix *matrix, struct cpumap *cmap),
+
+ TP_ARGS(bit, cpu, matrix, cmap)
+);
+
+DEFINE_EVENT(irq_matrix_cpu, irq_matrix_alloc_managed,
+
+ TP_PROTO(int bit, unsigned int cpu,
+ struct irq_matrix *matrix, struct cpumap *cmap),
+
+ TP_ARGS(bit, cpu, matrix, cmap)
+);
+
+DEFINE_EVENT(irq_matrix_cpu, irq_matrix_assign,
+
+ TP_PROTO(int bit, unsigned int cpu,
+ struct irq_matrix *matrix, struct cpumap *cmap),
+
+ TP_ARGS(bit, cpu, matrix, cmap)
+);
+
+DEFINE_EVENT(irq_matrix_cpu, irq_matrix_alloc,
+
+ TP_PROTO(int bit, unsigned int cpu,
+ struct irq_matrix *matrix, struct cpumap *cmap),
+
+ TP_ARGS(bit, cpu, matrix, cmap)
+);
+
+DEFINE_EVENT(irq_matrix_cpu, irq_matrix_free,
+
+ TP_PROTO(int bit, unsigned int cpu,
+ struct irq_matrix *matrix, struct cpumap *cmap),
+
+ TP_ARGS(bit, cpu, matrix, cmap)
+);
+
+
+#endif /* _TRACE_IRQ_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
--- a/kernel/irq/matrix.c
+++ b/kernel/irq/matrix.c
@@ -36,6 +36,9 @@ struct irq_matrix {
unsigned long system_map[IRQ_MATRIX_SIZE];
};

+#define CREATE_TRACE_POINTS
+#include <trace/events/irq_matrix.h>
+
/**
* irq_alloc_matrix - Allocate a irq_matrix structure and initialize it
* @matrix_bits: Number of matrix bits must be <= IRQ_MATRIX_BITS
@@ -84,6 +87,7 @@ void irq_matrix_online(struct irq_matrix
m->global_available += cm->available;
cm->online = true;
m->online_maps++;
+ trace_irq_matrix_online(m);
}

/**
@@ -98,6 +102,7 @@ void irq_matrix_offline(struct irq_matri
m->global_available -= cm->available;
cm->online = false;
m->online_maps--;
+ trace_irq_matrix_offline(m);
}

static unsigned int matrix_alloc_area(struct irq_matrix *m, struct cpumap *cm,
@@ -145,6 +150,8 @@ void irq_matrix_assign_system(struct irq
}
if (bit >= m->alloc_start && bit < m->alloc_end)
m->systembits_inalloc++;
+
+ trace_irq_matrix_assign_system(bit, m);
}

/**
@@ -172,6 +179,7 @@ int irq_matrix_reserve_managed(struct ir
cm->available--;
m->global_available--;
}
+ trace_irq_matrix_reserve_managed(bit, cpu, m, cm);
}
return 0;
cleanup:
@@ -221,6 +229,7 @@ void irq_matrix_remove_managed(struct ir
cm->available++;
m->global_available++;
}
+ trace_irq_matrix_remove_managed(bit, cpu, m, cm);
}
}

@@ -242,6 +251,7 @@ int irq_matrix_alloc_managed(struct irq_
set_bit(bit, cm->alloc_map);
cm->allocated++;
m->total_allocated++;
+ trace_irq_matrix_alloc_managed(bit, cpu, m, cm);
return bit;
}

@@ -264,6 +274,7 @@ void irq_matrix_assign(struct irq_matrix
m->total_allocated++;
cm->available--;
m->global_available--;
+ trace_irq_matrix_assign(bit, smp_processor_id(), m, cm);
}

/**
@@ -282,6 +293,7 @@ void irq_matrix_reserve(struct irq_matri
pr_warn("Interrupt reservation exceeds available resources\n");

m->global_reserved++;
+ trace_irq_matrix_reserve(m);
}

/**
@@ -296,6 +308,7 @@ void irq_matrix_reserve(struct irq_matri
void irq_matrix_remove_reserved(struct irq_matrix *m)
{
m->global_reserved--;
+ trace_irq_matrix_remove_reserved(m);
}

/**
@@ -326,6 +339,7 @@ int irq_matrix_alloc(struct irq_matrix *
if (reserved)
m->global_reserved--;
*mapped_cpu = cpu;
+ trace_irq_matrix_alloc(bit, cpu, m, cm);
return bit;
}
}
@@ -357,6 +371,7 @@ void irq_matrix_free(struct irq_matrix *
m->global_available++;
}
}
+ trace_irq_matrix_free(bit, cpu, m, cm);
}

/**