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authorChangbin Du <changbin.du@gmail.com>2019-02-10 00:19:19 +0800
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2019-02-11 14:53:43 -0500
commit85acbb21b9310043692cf18b1fd14067b5a25ccd (patch)
tree7ed6875971c33ecc34d0658410e8778fb63d944c /kernel/trace
parentd325c402964e7c63db94e9138c530832269a1297 (diff)
downloadlinux-85acbb21b9310043692cf18b1fd14067b5a25ccd.tar.bz2
tracing: Change the function format to display function names by perf
Here is an example for this change. $ sudo perf record -e 'ftrace:function' --filter='ip==schedule' $ sudo perf report The output of perf before this patch: \# Samples: 100 of event 'ftrace:function' \# Event count (approx.): 100 \# \# Overhead Trace output \# ........ ...................................... \# 51.00% ffffffff81f6aaa0 <-- ffffffff81158e8d 29.00% ffffffff81f6aaa0 <-- ffffffff8116ccb2 8.00% ffffffff81f6aaa0 <-- ffffffff81f6f2ed 4.00% ffffffff81f6aaa0 <-- ffffffff811628db 4.00% ffffffff81f6aaa0 <-- ffffffff81f6ec5b 2.00% ffffffff81f6aaa0 <-- ffffffff81f6f21a 1.00% ffffffff81f6aaa0 <-- ffffffff811b04af 1.00% ffffffff81f6aaa0 <-- ffffffff8143ce17 After this patch: \# Samples: 36 of event 'ftrace:function' \# Event count (approx.): 36 \# \# Overhead Trace output \# ........ ............................................ \# 38.89% schedule <-- schedule_hrtimeout_range_clock 27.78% schedule <-- worker_thread 13.89% schedule <-- schedule_timeout 11.11% schedule <-- smpboot_thread_fn 5.56% schedule <-- rcu_gp_kthread 2.78% schedule <-- exit_to_usermode_loop Link: http://lkml.kernel.org/r/20190209161919.32350-1-changbin.du@gmail.com Signed-off-by: Changbin Du <changbin.du@gmail.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace')
-rw-r--r--kernel/trace/trace_entries.h41
1 files changed, 19 insertions, 22 deletions
diff --git a/kernel/trace/trace_entries.h b/kernel/trace/trace_entries.h
index 06bb2fd9a56c..fc8e97328e54 100644
--- a/kernel/trace/trace_entries.h
+++ b/kernel/trace/trace_entries.h
@@ -65,7 +65,8 @@ FTRACE_ENTRY_REG(function, ftrace_entry,
__field( unsigned long, parent_ip )
),
- F_printk(" %lx <-- %lx", __entry->ip, __entry->parent_ip),
+ F_printk(" %ps <-- %ps",
+ (void *)__entry->ip, (void *)__entry->parent_ip),
FILTER_TRACE_FN,
@@ -83,7 +84,7 @@ FTRACE_ENTRY_PACKED(funcgraph_entry, ftrace_graph_ent_entry,
__field_desc( int, graph_ent, depth )
),
- F_printk("--> %lx (%d)", __entry->func, __entry->depth),
+ F_printk("--> %ps (%d)", (void *)__entry->func, __entry->depth),
FILTER_OTHER
);
@@ -102,8 +103,8 @@ FTRACE_ENTRY_PACKED(funcgraph_exit, ftrace_graph_ret_entry,
__field_desc( int, ret, depth )
),
- F_printk("<-- %lx (%d) (start: %llx end: %llx) over: %d",
- __entry->func, __entry->depth,
+ F_printk("<-- %ps (%d) (start: %llx end: %llx) over: %d",
+ (void *)__entry->func, __entry->depth,
__entry->calltime, __entry->rettime,
__entry->depth),
@@ -167,12 +168,6 @@ FTRACE_ENTRY_DUP(wakeup, ctx_switch_entry,
#define FTRACE_STACK_ENTRIES 8
-#ifndef CONFIG_64BIT
-# define IP_FMT "%08lx"
-#else
-# define IP_FMT "%016lx"
-#endif
-
FTRACE_ENTRY(kernel_stack, stack_entry,
TRACE_STACK,
@@ -182,12 +177,13 @@ FTRACE_ENTRY(kernel_stack, stack_entry,
__dynamic_array(unsigned long, caller )
),
- F_printk("\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n"
- "\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n"
- "\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n",
- __entry->caller[0], __entry->caller[1], __entry->caller[2],
- __entry->caller[3], __entry->caller[4], __entry->caller[5],
- __entry->caller[6], __entry->caller[7]),
+ F_printk("\t=> %ps\n\t=> %ps\n\t=> %ps\n"
+ "\t=> %ps\n\t=> %ps\n\t=> %ps\n"
+ "\t=> %ps\n\t=> %ps\n",
+ (void *)__entry->caller[0], (void *)__entry->caller[1],
+ (void *)__entry->caller[2], (void *)__entry->caller[3],
+ (void *)__entry->caller[4], (void *)__entry->caller[5],
+ (void *)__entry->caller[6], (void *)__entry->caller[7]),
FILTER_OTHER
);
@@ -201,12 +197,13 @@ FTRACE_ENTRY(user_stack, userstack_entry,
__array( unsigned long, caller, FTRACE_STACK_ENTRIES )
),
- F_printk("\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n"
- "\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n"
- "\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n",
- __entry->caller[0], __entry->caller[1], __entry->caller[2],
- __entry->caller[3], __entry->caller[4], __entry->caller[5],
- __entry->caller[6], __entry->caller[7]),
+ F_printk("\t=> %ps\n\t=> %ps\n\t=> %ps\n"
+ "\t=> %ps\n\t=> %ps\n\t=> %ps\n"
+ "\t=> %ps\n\t=> %ps\n",
+ (void *)__entry->caller[0], (void *)__entry->caller[1],
+ (void *)__entry->caller[2], (void *)__entry->caller[3],
+ (void *)__entry->caller[4], (void *)__entry->caller[5],
+ (void *)__entry->caller[6], (void *)__entry->caller[7]),
FILTER_OTHER
);