From 9106b69382912ddc403a307b69bf894a6f3004e4 Mon Sep 17 00:00:00 2001 From: Jiri Olsa Date: Fri, 2 Apr 2010 19:01:20 +0200 Subject: tracing: Add ftrace events for graph tracer Add ftrace events for graph tracer, so the graph output could be shared with other tracers. Signed-off-by: Jiri Olsa LKML-Reference: <1270227683-14631-2-git-send-email-jolsa@redhat.com> Signed-off-by: Steven Rostedt --- kernel/trace/trace_functions_graph.c | 28 +++++++++++++++++++++++++++- 1 file changed, 27 insertions(+), 1 deletion(-) (limited to 'kernel/trace/trace_functions_graph.c') diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c index 669b9c31861d..db9e06bb766e 100644 --- a/kernel/trace/trace_functions_graph.c +++ b/kernel/trace/trace_functions_graph.c @@ -40,7 +40,7 @@ struct fgraph_data { #define TRACE_GRAPH_PRINT_OVERHEAD 0x4 #define TRACE_GRAPH_PRINT_PROC 0x8 #define TRACE_GRAPH_PRINT_DURATION 0x10 -#define TRACE_GRAPH_PRINT_ABS_TIME 0X20 +#define TRACE_GRAPH_PRINT_ABS_TIME 0x20 static struct tracer_opt trace_opts[] = { /* Display overruns? (for self-debug purpose) */ @@ -1096,6 +1096,12 @@ print_graph_function(struct trace_iterator *iter) return TRACE_TYPE_HANDLED; } +static enum print_line_t +print_graph_function_event(struct trace_iterator *iter, int flags) +{ + return print_graph_function(iter); +} + static void print_lat_header(struct seq_file *s) { static const char spaces[] = " " /* 16 spaces */ @@ -1199,6 +1205,16 @@ static void graph_trace_close(struct trace_iterator *iter) } } +static struct trace_event graph_trace_entry_event = { + .type = TRACE_GRAPH_ENT, + .trace = print_graph_function_event, +}; + +static struct trace_event graph_trace_ret_event = { + .type = TRACE_GRAPH_RET, + .trace = print_graph_function_event, +}; + static struct tracer graph_trace __read_mostly = { .name = "function_graph", .open = graph_trace_open, @@ -1220,6 +1236,16 @@ static __init int init_graph_trace(void) { max_bytes_for_cpu = snprintf(NULL, 0, "%d", nr_cpu_ids - 1); + if (!register_ftrace_event(&graph_trace_entry_event)) { + pr_warning("Warning: could not register graph trace events\n"); + return 1; + } + + if (!register_ftrace_event(&graph_trace_ret_event)) { + pr_warning("Warning: could not register graph trace events\n"); + return 1; + } + return register_tracer(&graph_trace); } -- cgit v1.2.3 From d7a8d9e907cc294ec7a4a7046d1886375fbcc82e Mon Sep 17 00:00:00 2001 From: Jiri Olsa Date: Fri, 2 Apr 2010 19:01:21 +0200 Subject: tracing: Have graph flags passed in to ouput functions Let the function graph tracer have custom flags passed to its output functions. Signed-off-by: Jiri Olsa LKML-Reference: <1270227683-14631-3-git-send-email-jolsa@redhat.com> Signed-off-by: Steven Rostedt --- kernel/trace/trace.h | 6 +- kernel/trace/trace_functions_graph.c | 123 ++++++++++++++++++++--------------- 2 files changed, 73 insertions(+), 56 deletions(-) (limited to 'kernel/trace/trace_functions_graph.c') diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 2825ef2c0b15..970004c5fa79 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -491,7 +491,9 @@ extern int trace_clock_id; /* Standard output formatting function used for function return traces */ #ifdef CONFIG_FUNCTION_GRAPH_TRACER -extern enum print_line_t print_graph_function(struct trace_iterator *iter); +extern enum print_line_t +print_graph_function_flags(struct trace_iterator *iter, u32 flags); +extern void print_graph_headers_flags(struct seq_file *s, u32 flags); extern enum print_line_t trace_print_graph_duration(unsigned long long duration, struct trace_seq *s); @@ -524,7 +526,7 @@ static inline int ftrace_graph_addr(unsigned long addr) #endif /* CONFIG_DYNAMIC_FTRACE */ #else /* CONFIG_FUNCTION_GRAPH_TRACER */ static inline enum print_line_t -print_graph_function(struct trace_iterator *iter) +print_graph_function_flags(struct trace_iterator *iter, u32 flags) { return TRACE_TYPE_UNHANDLED; } diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c index db9e06bb766e..de5f6518aba0 100644 --- a/kernel/trace/trace_functions_graph.c +++ b/kernel/trace/trace_functions_graph.c @@ -527,17 +527,18 @@ get_return_for_leaf(struct trace_iterator *iter, /* Signal a overhead of time execution to the output */ static int -print_graph_overhead(unsigned long long duration, struct trace_seq *s) +print_graph_overhead(unsigned long long duration, struct trace_seq *s, + u32 flags) { /* If duration disappear, we don't need anything */ - if (!(tracer_flags.val & TRACE_GRAPH_PRINT_DURATION)) + if (!(flags & TRACE_GRAPH_PRINT_DURATION)) return 1; /* Non nested entry or return */ if (duration == -1) return trace_seq_printf(s, " "); - if (tracer_flags.val & TRACE_GRAPH_PRINT_OVERHEAD) { + if (flags & TRACE_GRAPH_PRINT_OVERHEAD) { /* Duration exceeded 100 msecs */ if (duration > 100000ULL) return trace_seq_printf(s, "! "); @@ -563,7 +564,7 @@ static int print_graph_abs_time(u64 t, struct trace_seq *s) static enum print_line_t print_graph_irq(struct trace_iterator *iter, unsigned long addr, - enum trace_type type, int cpu, pid_t pid) + enum trace_type type, int cpu, pid_t pid, u32 flags) { int ret; struct trace_seq *s = &iter->seq; @@ -573,21 +574,21 @@ print_graph_irq(struct trace_iterator *iter, unsigned long addr, return TRACE_TYPE_UNHANDLED; /* Absolute time */ - if (tracer_flags.val & TRACE_GRAPH_PRINT_ABS_TIME) { + if (flags & TRACE_GRAPH_PRINT_ABS_TIME) { ret = print_graph_abs_time(iter->ts, s); if (!ret) return TRACE_TYPE_PARTIAL_LINE; } /* Cpu */ - if (tracer_flags.val & TRACE_GRAPH_PRINT_CPU) { + if (flags & TRACE_GRAPH_PRINT_CPU) { ret = print_graph_cpu(s, cpu); if (ret == TRACE_TYPE_PARTIAL_LINE) return TRACE_TYPE_PARTIAL_LINE; } /* Proc */ - if (tracer_flags.val & TRACE_GRAPH_PRINT_PROC) { + if (flags & TRACE_GRAPH_PRINT_PROC) { ret = print_graph_proc(s, pid); if (ret == TRACE_TYPE_PARTIAL_LINE) return TRACE_TYPE_PARTIAL_LINE; @@ -597,7 +598,7 @@ print_graph_irq(struct trace_iterator *iter, unsigned long addr, } /* No overhead */ - ret = print_graph_overhead(-1, s); + ret = print_graph_overhead(-1, s, flags); if (!ret) return TRACE_TYPE_PARTIAL_LINE; @@ -610,7 +611,7 @@ print_graph_irq(struct trace_iterator *iter, unsigned long addr, return TRACE_TYPE_PARTIAL_LINE; /* Don't close the duration column if haven't one */ - if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION) + if (flags & TRACE_GRAPH_PRINT_DURATION) trace_seq_printf(s, " |"); ret = trace_seq_printf(s, "\n"); @@ -680,7 +681,8 @@ print_graph_duration(unsigned long long duration, struct trace_seq *s) static enum print_line_t print_graph_entry_leaf(struct trace_iterator *iter, struct ftrace_graph_ent_entry *entry, - struct ftrace_graph_ret_entry *ret_entry, struct trace_seq *s) + struct ftrace_graph_ret_entry *ret_entry, + struct trace_seq *s, u32 flags) { struct fgraph_data *data = iter->private; struct ftrace_graph_ret *graph_ret; @@ -712,12 +714,12 @@ print_graph_entry_leaf(struct trace_iterator *iter, } /* Overhead */ - ret = print_graph_overhead(duration, s); + ret = print_graph_overhead(duration, s, flags); if (!ret) return TRACE_TYPE_PARTIAL_LINE; /* Duration */ - if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION) { + if (flags & TRACE_GRAPH_PRINT_DURATION) { ret = print_graph_duration(duration, s); if (ret == TRACE_TYPE_PARTIAL_LINE) return TRACE_TYPE_PARTIAL_LINE; @@ -740,7 +742,7 @@ print_graph_entry_leaf(struct trace_iterator *iter, static enum print_line_t print_graph_entry_nested(struct trace_iterator *iter, struct ftrace_graph_ent_entry *entry, - struct trace_seq *s, int cpu) + struct trace_seq *s, int cpu, u32 flags) { struct ftrace_graph_ent *call = &entry->graph_ent; struct fgraph_data *data = iter->private; @@ -760,12 +762,12 @@ print_graph_entry_nested(struct trace_iterator *iter, } /* No overhead */ - ret = print_graph_overhead(-1, s); + ret = print_graph_overhead(-1, s, flags); if (!ret) return TRACE_TYPE_PARTIAL_LINE; /* No time */ - if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION) { + if (flags & TRACE_GRAPH_PRINT_DURATION) { ret = trace_seq_printf(s, " | "); if (!ret) return TRACE_TYPE_PARTIAL_LINE; @@ -791,7 +793,7 @@ print_graph_entry_nested(struct trace_iterator *iter, static enum print_line_t print_graph_prologue(struct trace_iterator *iter, struct trace_seq *s, - int type, unsigned long addr) + int type, unsigned long addr, u32 flags) { struct fgraph_data *data = iter->private; struct trace_entry *ent = iter->ent; @@ -804,27 +806,27 @@ print_graph_prologue(struct trace_iterator *iter, struct trace_seq *s, if (type) { /* Interrupt */ - ret = print_graph_irq(iter, addr, type, cpu, ent->pid); + ret = print_graph_irq(iter, addr, type, cpu, ent->pid, flags); if (ret == TRACE_TYPE_PARTIAL_LINE) return TRACE_TYPE_PARTIAL_LINE; } /* Absolute time */ - if (tracer_flags.val & TRACE_GRAPH_PRINT_ABS_TIME) { + if (flags & TRACE_GRAPH_PRINT_ABS_TIME) { ret = print_graph_abs_time(iter->ts, s); if (!ret) return TRACE_TYPE_PARTIAL_LINE; } /* Cpu */ - if (tracer_flags.val & TRACE_GRAPH_PRINT_CPU) { + if (flags & TRACE_GRAPH_PRINT_CPU) { ret = print_graph_cpu(s, cpu); if (ret == TRACE_TYPE_PARTIAL_LINE) return TRACE_TYPE_PARTIAL_LINE; } /* Proc */ - if (tracer_flags.val & TRACE_GRAPH_PRINT_PROC) { + if (flags & TRACE_GRAPH_PRINT_PROC) { ret = print_graph_proc(s, ent->pid); if (ret == TRACE_TYPE_PARTIAL_LINE) return TRACE_TYPE_PARTIAL_LINE; @@ -846,7 +848,7 @@ print_graph_prologue(struct trace_iterator *iter, struct trace_seq *s, static enum print_line_t print_graph_entry(struct ftrace_graph_ent_entry *field, struct trace_seq *s, - struct trace_iterator *iter) + struct trace_iterator *iter, u32 flags) { struct fgraph_data *data = iter->private; struct ftrace_graph_ent *call = &field->graph_ent; @@ -854,14 +856,14 @@ print_graph_entry(struct ftrace_graph_ent_entry *field, struct trace_seq *s, static enum print_line_t ret; int cpu = iter->cpu; - if (print_graph_prologue(iter, s, TRACE_GRAPH_ENT, call->func)) + if (print_graph_prologue(iter, s, TRACE_GRAPH_ENT, call->func, flags)) return TRACE_TYPE_PARTIAL_LINE; leaf_ret = get_return_for_leaf(iter, field); if (leaf_ret) - ret = print_graph_entry_leaf(iter, field, leaf_ret, s); + ret = print_graph_entry_leaf(iter, field, leaf_ret, s, flags); else - ret = print_graph_entry_nested(iter, field, s, cpu); + ret = print_graph_entry_nested(iter, field, s, cpu, flags); if (data) { /* @@ -880,7 +882,8 @@ print_graph_entry(struct ftrace_graph_ent_entry *field, struct trace_seq *s, static enum print_line_t print_graph_return(struct ftrace_graph_ret *trace, struct trace_seq *s, - struct trace_entry *ent, struct trace_iterator *iter) + struct trace_entry *ent, struct trace_iterator *iter, + u32 flags) { unsigned long long duration = trace->rettime - trace->calltime; struct fgraph_data *data = iter->private; @@ -910,16 +913,16 @@ print_graph_return(struct ftrace_graph_ret *trace, struct trace_seq *s, } } - if (print_graph_prologue(iter, s, 0, 0)) + if (print_graph_prologue(iter, s, 0, 0, flags)) return TRACE_TYPE_PARTIAL_LINE; /* Overhead */ - ret = print_graph_overhead(duration, s); + ret = print_graph_overhead(duration, s, flags); if (!ret) return TRACE_TYPE_PARTIAL_LINE; /* Duration */ - if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION) { + if (flags & TRACE_GRAPH_PRINT_DURATION) { ret = print_graph_duration(duration, s); if (ret == TRACE_TYPE_PARTIAL_LINE) return TRACE_TYPE_PARTIAL_LINE; @@ -949,14 +952,15 @@ print_graph_return(struct ftrace_graph_ret *trace, struct trace_seq *s, } /* Overrun */ - if (tracer_flags.val & TRACE_GRAPH_PRINT_OVERRUN) { + if (flags & TRACE_GRAPH_PRINT_OVERRUN) { ret = trace_seq_printf(s, " (Overruns: %lu)\n", trace->overrun); if (!ret) return TRACE_TYPE_PARTIAL_LINE; } - ret = print_graph_irq(iter, trace->func, TRACE_GRAPH_RET, cpu, pid); + ret = print_graph_irq(iter, trace->func, TRACE_GRAPH_RET, + cpu, pid, flags); if (ret == TRACE_TYPE_PARTIAL_LINE) return TRACE_TYPE_PARTIAL_LINE; @@ -964,8 +968,8 @@ print_graph_return(struct ftrace_graph_ret *trace, struct trace_seq *s, } static enum print_line_t -print_graph_comment(struct trace_seq *s, struct trace_entry *ent, - struct trace_iterator *iter) +print_graph_comment(struct trace_seq *s, struct trace_entry *ent, + struct trace_iterator *iter, u32 flags) { unsigned long sym_flags = (trace_flags & TRACE_ITER_SYM_MASK); struct fgraph_data *data = iter->private; @@ -977,16 +981,16 @@ print_graph_comment(struct trace_seq *s, struct trace_entry *ent, if (data) depth = per_cpu_ptr(data->cpu_data, iter->cpu)->depth; - if (print_graph_prologue(iter, s, 0, 0)) + if (print_graph_prologue(iter, s, 0, 0, flags)) return TRACE_TYPE_PARTIAL_LINE; /* No overhead */ - ret = print_graph_overhead(-1, s); + ret = print_graph_overhead(-1, s, flags); if (!ret) return TRACE_TYPE_PARTIAL_LINE; /* No time */ - if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION) { + if (flags & TRACE_GRAPH_PRINT_DURATION) { ret = trace_seq_printf(s, " | "); if (!ret) return TRACE_TYPE_PARTIAL_LINE; @@ -1041,7 +1045,7 @@ print_graph_comment(struct trace_seq *s, struct trace_entry *ent, enum print_line_t -print_graph_function(struct trace_iterator *iter) +print_graph_function_flags(struct trace_iterator *iter, u32 flags) { struct ftrace_graph_ent_entry *field; struct fgraph_data *data = iter->private; @@ -1062,7 +1066,7 @@ print_graph_function(struct trace_iterator *iter) if (data && data->failed) { field = &data->ent; iter->cpu = data->cpu; - ret = print_graph_entry(field, s, iter); + ret = print_graph_entry(field, s, iter, flags); if (ret == TRACE_TYPE_HANDLED && iter->cpu != cpu) { per_cpu_ptr(data->cpu_data, iter->cpu)->ignore = 1; ret = TRACE_TYPE_NO_CONSUME; @@ -1082,38 +1086,44 @@ print_graph_function(struct trace_iterator *iter) struct ftrace_graph_ent_entry saved; trace_assign_type(field, entry); saved = *field; - return print_graph_entry(&saved, s, iter); + return print_graph_entry(&saved, s, iter, flags); } case TRACE_GRAPH_RET: { struct ftrace_graph_ret_entry *field; trace_assign_type(field, entry); - return print_graph_return(&field->ret, s, entry, iter); + return print_graph_return(&field->ret, s, entry, iter, flags); } default: - return print_graph_comment(s, entry, iter); + return print_graph_comment(s, entry, iter, flags); } return TRACE_TYPE_HANDLED; } +static enum print_line_t +print_graph_function(struct trace_iterator *iter) +{ + return print_graph_function_flags(iter, tracer_flags.val); +} + static enum print_line_t print_graph_function_event(struct trace_iterator *iter, int flags) { return print_graph_function(iter); } -static void print_lat_header(struct seq_file *s) +static void print_lat_header(struct seq_file *s, u32 flags) { static const char spaces[] = " " /* 16 spaces */ " " /* 4 spaces */ " "; /* 17 spaces */ int size = 0; - if (tracer_flags.val & TRACE_GRAPH_PRINT_ABS_TIME) + if (flags & TRACE_GRAPH_PRINT_ABS_TIME) size += 16; - if (tracer_flags.val & TRACE_GRAPH_PRINT_CPU) + if (flags & TRACE_GRAPH_PRINT_CPU) size += 4; - if (tracer_flags.val & TRACE_GRAPH_PRINT_PROC) + if (flags & TRACE_GRAPH_PRINT_PROC) size += 17; seq_printf(s, "#%.*s _-----=> irqs-off \n", size, spaces); @@ -1124,42 +1134,47 @@ static void print_lat_header(struct seq_file *s) seq_printf(s, "#%.*s|||| / \n", size, spaces); } -static void print_graph_headers(struct seq_file *s) +void print_graph_headers_flags(struct seq_file *s, u32 flags) { int lat = trace_flags & TRACE_ITER_LATENCY_FMT; if (lat) - print_lat_header(s); + print_lat_header(s, flags); /* 1st line */ seq_printf(s, "#"); - if (tracer_flags.val & TRACE_GRAPH_PRINT_ABS_TIME) + if (flags & TRACE_GRAPH_PRINT_ABS_TIME) seq_printf(s, " TIME "); - if (tracer_flags.val & TRACE_GRAPH_PRINT_CPU) + if (flags & TRACE_GRAPH_PRINT_CPU) seq_printf(s, " CPU"); - if (tracer_flags.val & TRACE_GRAPH_PRINT_PROC) + if (flags & TRACE_GRAPH_PRINT_PROC) seq_printf(s, " TASK/PID "); if (lat) seq_printf(s, "|||||"); - if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION) + if (flags & TRACE_GRAPH_PRINT_DURATION) seq_printf(s, " DURATION "); seq_printf(s, " FUNCTION CALLS\n"); /* 2nd line */ seq_printf(s, "#"); - if (tracer_flags.val & TRACE_GRAPH_PRINT_ABS_TIME) + if (flags & TRACE_GRAPH_PRINT_ABS_TIME) seq_printf(s, " | "); - if (tracer_flags.val & TRACE_GRAPH_PRINT_CPU) + if (flags & TRACE_GRAPH_PRINT_CPU) seq_printf(s, " | "); - if (tracer_flags.val & TRACE_GRAPH_PRINT_PROC) + if (flags & TRACE_GRAPH_PRINT_PROC) seq_printf(s, " | | "); if (lat) seq_printf(s, "|||||"); - if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION) + if (flags & TRACE_GRAPH_PRINT_DURATION) seq_printf(s, " | | "); seq_printf(s, " | | | |\n"); } +static void print_graph_headers(struct seq_file *s) +{ + print_graph_headers_flags(s, tracer_flags.val); +} + static void graph_trace_open(struct trace_iterator *iter) { /* pid and depth on the last trace processed */ -- cgit v1.2.3 From 62b915f1060996a8e1f69be50e3b8e9e43b710cb Mon Sep 17 00:00:00 2001 From: Jiri Olsa Date: Fri, 2 Apr 2010 19:01:22 +0200 Subject: tracing: Add graph output support for irqsoff tracer Add function graph output to irqsoff tracer. The graph output is enabled by setting new 'display-graph' trace option. Signed-off-by: Jiri Olsa LKML-Reference: <1270227683-14631-4-git-send-email-jolsa@redhat.com> Signed-off-by: Steven Rostedt --- include/linux/ftrace.h | 15 +- kernel/trace/trace.c | 35 +++-- kernel/trace/trace.h | 21 +++ kernel/trace/trace_functions_graph.c | 15 +- kernel/trace/trace_irqsoff.c | 271 +++++++++++++++++++++++++++++++++-- 5 files changed, 324 insertions(+), 33 deletions(-) (limited to 'kernel/trace/trace_functions_graph.c') diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h index ea5b1aae0e8b..8415a522f430 100644 --- a/include/linux/ftrace.h +++ b/include/linux/ftrace.h @@ -352,6 +352,10 @@ struct ftrace_graph_ret { int depth; }; +/* Type of the callback handlers for tracing function graph*/ +typedef void (*trace_func_graph_ret_t)(struct ftrace_graph_ret *); /* return */ +typedef int (*trace_func_graph_ent_t)(struct ftrace_graph_ent *); /* entry */ + #ifdef CONFIG_FUNCTION_GRAPH_TRACER /* for init task */ @@ -400,10 +404,6 @@ extern char __irqentry_text_end[]; #define FTRACE_RETFUNC_DEPTH 50 #define FTRACE_RETSTACK_ALLOC_SIZE 32 -/* Type of the callback handlers for tracing function graph*/ -typedef void (*trace_func_graph_ret_t)(struct ftrace_graph_ret *); /* return */ -typedef int (*trace_func_graph_ent_t)(struct ftrace_graph_ent *); /* entry */ - extern int register_ftrace_graph(trace_func_graph_ret_t retfunc, trace_func_graph_ent_t entryfunc); @@ -441,6 +441,13 @@ static inline void unpause_graph_tracing(void) static inline void ftrace_graph_init_task(struct task_struct *t) { } static inline void ftrace_graph_exit_task(struct task_struct *t) { } +static inline int register_ftrace_graph(trace_func_graph_ret_t retfunc, + trace_func_graph_ent_t entryfunc) +{ + return -1; +} +static inline void unregister_ftrace_graph(void) { } + static inline int task_curr_ret_stack(struct task_struct *tsk) { return -1; diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 7b516c7ef9a0..8b9ba41ec146 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -1808,7 +1808,7 @@ static void print_func_help_header(struct seq_file *m) } -static void +void print_trace_header(struct seq_file *m, struct trace_iterator *iter) { unsigned long sym_flags = (trace_flags & TRACE_ITER_SYM_MASK); @@ -2017,7 +2017,7 @@ static enum print_line_t print_bin_fmt(struct trace_iterator *iter) return event ? event->binary(iter, 0) : TRACE_TYPE_HANDLED; } -static int trace_empty(struct trace_iterator *iter) +int trace_empty(struct trace_iterator *iter) { int cpu; @@ -2084,6 +2084,23 @@ static enum print_line_t print_trace_line(struct trace_iterator *iter) return print_trace_fmt(iter); } +void trace_default_header(struct seq_file *m) +{ + struct trace_iterator *iter = m->private; + + if (iter->iter_flags & TRACE_FILE_LAT_FMT) { + /* print nothing if the buffers are empty */ + if (trace_empty(iter)) + return; + print_trace_header(m, iter); + if (!(trace_flags & TRACE_ITER_VERBOSE)) + print_lat_help_header(m); + } else { + if (!(trace_flags & TRACE_ITER_VERBOSE)) + print_func_help_header(m); + } +} + static int s_show(struct seq_file *m, void *v) { struct trace_iterator *iter = v; @@ -2096,17 +2113,9 @@ static int s_show(struct seq_file *m, void *v) } if (iter->trace && iter->trace->print_header) iter->trace->print_header(m); - else if (iter->iter_flags & TRACE_FILE_LAT_FMT) { - /* print nothing if the buffers are empty */ - if (trace_empty(iter)) - return 0; - print_trace_header(m, iter); - if (!(trace_flags & TRACE_ITER_VERBOSE)) - print_lat_help_header(m); - } else { - if (!(trace_flags & TRACE_ITER_VERBOSE)) - print_func_help_header(m); - } + else + trace_default_header(m); + } else if (iter->leftover) { /* * If we filled the seq_file buffer earlier, we diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 970004c5fa79..911e9864e94a 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -378,6 +378,9 @@ void trace_function(struct trace_array *tr, unsigned long ip, unsigned long parent_ip, unsigned long flags, int pc); +void trace_default_header(struct seq_file *m); +void print_trace_header(struct seq_file *m, struct trace_iterator *iter); +int trace_empty(struct trace_iterator *iter); void trace_graph_return(struct ftrace_graph_ret *trace); int trace_graph_entry(struct ftrace_graph_ent *trace); @@ -491,11 +494,29 @@ extern int trace_clock_id; /* Standard output formatting function used for function return traces */ #ifdef CONFIG_FUNCTION_GRAPH_TRACER + +/* Flag options */ +#define TRACE_GRAPH_PRINT_OVERRUN 0x1 +#define TRACE_GRAPH_PRINT_CPU 0x2 +#define TRACE_GRAPH_PRINT_OVERHEAD 0x4 +#define TRACE_GRAPH_PRINT_PROC 0x8 +#define TRACE_GRAPH_PRINT_DURATION 0x10 +#define TRACE_GRAPH_PRINT_ABS_TIME 0x20 + extern enum print_line_t print_graph_function_flags(struct trace_iterator *iter, u32 flags); extern void print_graph_headers_flags(struct seq_file *s, u32 flags); extern enum print_line_t trace_print_graph_duration(unsigned long long duration, struct trace_seq *s); +extern void graph_trace_open(struct trace_iterator *iter); +extern void graph_trace_close(struct trace_iterator *iter); +extern int __trace_graph_entry(struct trace_array *tr, + struct ftrace_graph_ent *trace, + unsigned long flags, int pc); +extern void __trace_graph_return(struct trace_array *tr, + struct ftrace_graph_ret *trace, + unsigned long flags, int pc); + #ifdef CONFIG_DYNAMIC_FTRACE /* TODO: make this variable */ diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c index de5f6518aba0..dd11c830eb84 100644 --- a/kernel/trace/trace_functions_graph.c +++ b/kernel/trace/trace_functions_graph.c @@ -179,7 +179,7 @@ unsigned long ftrace_return_to_handler(unsigned long frame_pointer) return ret; } -static int __trace_graph_entry(struct trace_array *tr, +int __trace_graph_entry(struct trace_array *tr, struct ftrace_graph_ent *trace, unsigned long flags, int pc) @@ -246,7 +246,7 @@ int trace_graph_thresh_entry(struct ftrace_graph_ent *trace) return trace_graph_entry(trace); } -static void __trace_graph_return(struct trace_array *tr, +void __trace_graph_return(struct trace_array *tr, struct ftrace_graph_ret *trace, unsigned long flags, int pc) @@ -1093,6 +1093,11 @@ print_graph_function_flags(struct trace_iterator *iter, u32 flags) trace_assign_type(field, entry); return print_graph_return(&field->ret, s, entry, iter, flags); } + case TRACE_STACK: + case TRACE_FN: + /* dont trace stack and functions as comments */ + return TRACE_TYPE_UNHANDLED; + default: return print_graph_comment(s, entry, iter, flags); } @@ -1170,12 +1175,12 @@ void print_graph_headers_flags(struct seq_file *s, u32 flags) seq_printf(s, " | | | |\n"); } -static void print_graph_headers(struct seq_file *s) +void print_graph_headers(struct seq_file *s) { print_graph_headers_flags(s, tracer_flags.val); } -static void graph_trace_open(struct trace_iterator *iter) +void graph_trace_open(struct trace_iterator *iter) { /* pid and depth on the last trace processed */ struct fgraph_data *data; @@ -1210,7 +1215,7 @@ static void graph_trace_open(struct trace_iterator *iter) pr_warning("function graph tracer: not enough memory\n"); } -static void graph_trace_close(struct trace_iterator *iter) +void graph_trace_close(struct trace_iterator *iter) { struct fgraph_data *data = iter->private; diff --git a/kernel/trace/trace_irqsoff.c b/kernel/trace/trace_irqsoff.c index 2974bc7538c7..6fd486e0cef4 100644 --- a/kernel/trace/trace_irqsoff.c +++ b/kernel/trace/trace_irqsoff.c @@ -34,6 +34,9 @@ static int trace_type __read_mostly; static int save_lat_flag; +static void stop_irqsoff_tracer(struct trace_array *tr, int graph); +static int start_irqsoff_tracer(struct trace_array *tr, int graph); + #ifdef CONFIG_PREEMPT_TRACER static inline int preempt_trace(void) @@ -55,6 +58,23 @@ irq_trace(void) # define irq_trace() (0) #endif +#define TRACE_DISPLAY_GRAPH 1 + +static struct tracer_opt trace_opts[] = { +#ifdef CONFIG_FUNCTION_GRAPH_TRACER + /* display latency trace as call graph */ + { TRACER_OPT(display-graph, TRACE_DISPLAY_GRAPH) }, +#endif + { } /* Empty entry */ +}; + +static struct tracer_flags tracer_flags = { + .val = 0, + .opts = trace_opts, +}; + +#define is_graph() (tracer_flags.val & TRACE_DISPLAY_GRAPH) + /* * Sequence count - we record it when starting a measurement and * skip the latency if the sequence has changed - some other section @@ -108,6 +128,202 @@ static struct ftrace_ops trace_ops __read_mostly = }; #endif /* CONFIG_FUNCTION_TRACER */ +#ifdef CONFIG_FUNCTION_GRAPH_TRACER +static int irqsoff_set_flag(u32 old_flags, u32 bit, int set) +{ + int cpu; + + if (!(bit & TRACE_DISPLAY_GRAPH)) + return -EINVAL; + + if (!(is_graph() ^ set)) + return 0; + + stop_irqsoff_tracer(irqsoff_trace, !set); + + for_each_possible_cpu(cpu) + per_cpu(tracing_cpu, cpu) = 0; + + tracing_max_latency = 0; + tracing_reset_online_cpus(irqsoff_trace); + + return start_irqsoff_tracer(irqsoff_trace, set); +} + +static int irqsoff_graph_entry(struct ftrace_graph_ent *trace) +{ + struct trace_array *tr = irqsoff_trace; + struct trace_array_cpu *data; + unsigned long flags; + long disabled; + int ret; + int cpu; + int pc; + + cpu = raw_smp_processor_id(); + if (likely(!per_cpu(tracing_cpu, cpu))) + return 0; + + local_save_flags(flags); + /* slight chance to get a false positive on tracing_cpu */ + if (!irqs_disabled_flags(flags)) + return 0; + + data = tr->data[cpu]; + disabled = atomic_inc_return(&data->disabled); + + if (likely(disabled == 1)) { + pc = preempt_count(); + ret = __trace_graph_entry(tr, trace, flags, pc); + } else + ret = 0; + + atomic_dec(&data->disabled); + return ret; +} + +static void irqsoff_graph_return(struct ftrace_graph_ret *trace) +{ + struct trace_array *tr = irqsoff_trace; + struct trace_array_cpu *data; + unsigned long flags; + long disabled; + int cpu; + int pc; + + cpu = raw_smp_processor_id(); + if (likely(!per_cpu(tracing_cpu, cpu))) + return; + + local_save_flags(flags); + /* slight chance to get a false positive on tracing_cpu */ + if (!irqs_disabled_flags(flags)) + return; + + data = tr->data[cpu]; + disabled = atomic_inc_return(&data->disabled); + + if (likely(disabled == 1)) { + pc = preempt_count(); + __trace_graph_return(tr, trace, flags, pc); + } + + atomic_dec(&data->disabled); +} + +static void irqsoff_trace_open(struct trace_iterator *iter) +{ + if (is_graph()) + graph_trace_open(iter); + +} + +static void irqsoff_trace_close(struct trace_iterator *iter) +{ + if (iter->private) + graph_trace_close(iter); +} + +#define GRAPH_TRACER_FLAGS (TRACE_GRAPH_PRINT_CPU | \ + TRACE_GRAPH_PRINT_PROC) + +static enum print_line_t irqsoff_print_line(struct trace_iterator *iter) +{ + u32 flags = GRAPH_TRACER_FLAGS; + + if (trace_flags & TRACE_ITER_LATENCY_FMT) + flags |= TRACE_GRAPH_PRINT_DURATION; + else + flags |= TRACE_GRAPH_PRINT_ABS_TIME; + + /* + * In graph mode call the graph tracer output function, + * otherwise go with the TRACE_FN event handler + */ + if (is_graph()) + return print_graph_function_flags(iter, flags); + + return TRACE_TYPE_UNHANDLED; +} + +static void irqsoff_print_header(struct seq_file *s) +{ + if (is_graph()) { + struct trace_iterator *iter = s->private; + u32 flags = GRAPH_TRACER_FLAGS; + + if (trace_flags & TRACE_ITER_LATENCY_FMT) { + /* print nothing if the buffers are empty */ + if (trace_empty(iter)) + return; + + print_trace_header(s, iter); + flags |= TRACE_GRAPH_PRINT_DURATION; + } else + flags |= TRACE_GRAPH_PRINT_ABS_TIME; + + print_graph_headers_flags(s, flags); + } else + trace_default_header(s); +} + +static void +trace_graph_function(struct trace_array *tr, + unsigned long ip, unsigned long flags, int pc) +{ + u64 time = trace_clock_local(); + struct ftrace_graph_ent ent = { + .func = ip, + .depth = 0, + }; + struct ftrace_graph_ret ret = { + .func = ip, + .depth = 0, + .calltime = time, + .rettime = time, + }; + + __trace_graph_entry(tr, &ent, flags, pc); + __trace_graph_return(tr, &ret, flags, pc); +} + +static void +__trace_function(struct trace_array *tr, + unsigned long ip, unsigned long parent_ip, + unsigned long flags, int pc) +{ + if (!is_graph()) + trace_function(tr, ip, parent_ip, flags, pc); + else { + trace_graph_function(tr, parent_ip, flags, pc); + trace_graph_function(tr, ip, flags, pc); + } +} + +#else +#define __trace_function trace_function + +static int irqsoff_set_flag(u32 old_flags, u32 bit, int set) +{ + return -EINVAL; +} + +static int irqsoff_graph_entry(struct ftrace_graph_ent *trace) +{ + return -1; +} + +static enum print_line_t irqsoff_print_line(struct trace_iterator *iter) +{ + return TRACE_TYPE_UNHANDLED; +} + +static void irqsoff_graph_return(struct ftrace_graph_ret *trace) { } +static void irqsoff_print_header(struct seq_file *s) { } +static void irqsoff_trace_open(struct trace_iterator *iter) { } +static void irqsoff_trace_close(struct trace_iterator *iter) { } +#endif /* CONFIG_FUNCTION_GRAPH_TRACER */ + /* * Should this new latency be reported/recorded? */ @@ -150,7 +366,7 @@ check_critical_timing(struct trace_array *tr, if (!report_latency(delta)) goto out_unlock; - trace_function(tr, CALLER_ADDR0, parent_ip, flags, pc); + __trace_function(tr, CALLER_ADDR0, parent_ip, flags, pc); /* Skip 5 functions to get to the irq/preempt enable function */ __trace_stack(tr, flags, 5, pc); @@ -172,7 +388,7 @@ out_unlock: out: data->critical_sequence = max_sequence; data->preempt_timestamp = ftrace_now(cpu); - trace_function(tr, CALLER_ADDR0, parent_ip, flags, pc); + __trace_function(tr, CALLER_ADDR0, parent_ip, flags, pc); } static inline void @@ -204,7 +420,7 @@ start_critical_timing(unsigned long ip, unsigned long parent_ip) local_save_flags(flags); - trace_function(tr, ip, parent_ip, flags, preempt_count()); + __trace_function(tr, ip, parent_ip, flags, preempt_count()); per_cpu(tracing_cpu, cpu) = 1; @@ -238,7 +454,7 @@ stop_critical_timing(unsigned long ip, unsigned long parent_ip) atomic_inc(&data->disabled); local_save_flags(flags); - trace_function(tr, ip, parent_ip, flags, preempt_count()); + __trace_function(tr, ip, parent_ip, flags, preempt_count()); check_critical_timing(tr, data, parent_ip ? : ip, cpu); data->critical_start = 0; atomic_dec(&data->disabled); @@ -347,19 +563,32 @@ void trace_preempt_off(unsigned long a0, unsigned long a1) } #endif /* CONFIG_PREEMPT_TRACER */ -static void start_irqsoff_tracer(struct trace_array *tr) +static int start_irqsoff_tracer(struct trace_array *tr, int graph) { - register_ftrace_function(&trace_ops); - if (tracing_is_enabled()) + int ret = 0; + + if (!graph) + ret = register_ftrace_function(&trace_ops); + else + ret = register_ftrace_graph(&irqsoff_graph_return, + &irqsoff_graph_entry); + + if (!ret && tracing_is_enabled()) tracer_enabled = 1; else tracer_enabled = 0; + + return ret; } -static void stop_irqsoff_tracer(struct trace_array *tr) +static void stop_irqsoff_tracer(struct trace_array *tr, int graph) { tracer_enabled = 0; - unregister_ftrace_function(&trace_ops); + + if (!graph) + unregister_ftrace_function(&trace_ops); + else + unregister_ftrace_graph(); } static void __irqsoff_tracer_init(struct trace_array *tr) @@ -372,12 +601,14 @@ static void __irqsoff_tracer_init(struct trace_array *tr) /* make sure that the tracer is visible */ smp_wmb(); tracing_reset_online_cpus(tr); - start_irqsoff_tracer(tr); + + if (start_irqsoff_tracer(tr, is_graph())) + printk(KERN_ERR "failed to start irqsoff tracer\n"); } static void irqsoff_tracer_reset(struct trace_array *tr) { - stop_irqsoff_tracer(tr); + stop_irqsoff_tracer(tr, is_graph()); if (!save_lat_flag) trace_flags &= ~TRACE_ITER_LATENCY_FMT; @@ -409,9 +640,15 @@ static struct tracer irqsoff_tracer __read_mostly = .start = irqsoff_tracer_start, .stop = irqsoff_tracer_stop, .print_max = 1, + .print_header = irqsoff_print_header, + .print_line = irqsoff_print_line, + .flags = &tracer_flags, + .set_flag = irqsoff_set_flag, #ifdef CONFIG_FTRACE_SELFTEST .selftest = trace_selftest_startup_irqsoff, #endif + .open = irqsoff_trace_open, + .close = irqsoff_trace_close, }; # define register_irqsoff(trace) register_tracer(&trace) #else @@ -435,9 +672,15 @@ static struct tracer preemptoff_tracer __read_mostly = .start = irqsoff_tracer_start, .stop = irqsoff_tracer_stop, .print_max = 1, + .print_header = irqsoff_print_header, + .print_line = irqsoff_print_line, + .flags = &tracer_flags, + .set_flag = irqsoff_set_flag, #ifdef CONFIG_FTRACE_SELFTEST .selftest = trace_selftest_startup_preemptoff, #endif + .open = irqsoff_trace_open, + .close = irqsoff_trace_close, }; # define register_preemptoff(trace) register_tracer(&trace) #else @@ -463,9 +706,15 @@ static struct tracer preemptirqsoff_tracer __read_mostly = .start = irqsoff_tracer_start, .stop = irqsoff_tracer_stop, .print_max = 1, + .print_header = irqsoff_print_header, + .print_line = irqsoff_print_line, + .flags = &tracer_flags, + .set_flag = irqsoff_set_flag, #ifdef CONFIG_FTRACE_SELFTEST .selftest = trace_selftest_startup_preemptirqsoff, #endif + .open = irqsoff_trace_open, + .close = irqsoff_trace_close, }; # define register_preemptirqsoff(trace) register_tracer(&trace) -- cgit v1.2.3