diff options
| author | Chris Redpath <chris.redpath@arm.com> | 2015-02-03 17:26:54 +0900 |
|---|---|---|
| committer | Seung-Woo Kim <sw0312.kim@samsung.com> | 2016-12-14 13:41:48 +0900 |
| commit | da7debdb62bcd558948f54404c2d4530bc10335a (patch) | |
| tree | 0e12339b3ceec29dfd554b6d9323b887ed8632bc /kernel | |
| parent | 519aaf480b302512edad375022be5d9050585ef1 (diff) | |
smp: smp_cross_call function pointer tracing
generic tracing for smp_cross_call function calls
Signed-off-by: Chris Redpath <chris.redpath@arm.com>
Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>
Signed-off-by: Jon Medhurst <tixy@linaro.org>
[k.kozlowski: rebased on 4.1, no signed-off-by of previous committer]
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/smp.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/kernel/smp.c b/kernel/smp.c index 07854477c164..8eb18ff6c523 100644 --- a/kernel/smp.c +++ b/kernel/smp.c @@ -14,6 +14,8 @@ #include <linux/smp.h> #include <linux/cpu.h> #include <linux/sched.h> +#define CREATE_TRACE_POINTS +#include <trace/events/smp.h> #include "smpboot.h" @@ -153,7 +155,9 @@ static int generic_exec_single(int cpu, struct call_single_data *csd, */ csd_unlock(csd); local_irq_save(flags); + trace_smp_call_func_entry(func); func(info); + trace_smp_call_func_exit(func); local_irq_restore(flags); return 0; } @@ -178,8 +182,10 @@ static int generic_exec_single(int cpu, struct call_single_data *csd, * locking and barrier primitives. Generic code isn't really * equipped to do the right thing... */ - if (llist_add(&csd->llist, &per_cpu(call_single_queue, cpu))) + if (llist_add(&csd->llist, &per_cpu(call_single_queue, cpu))) { + trace_smp_call_func_send(csd->func, cpu); arch_send_call_function_single_ipi(cpu); + } return 0; } @@ -240,14 +246,17 @@ static void flush_smp_call_function_queue(bool warn_cpu_offline) llist_for_each_entry_safe(csd, csd_next, entry, llist) { smp_call_func_t func = csd->func; void *info = csd->info; - /* Do we wait until *after* callback? */ if (csd->flags & CSD_FLAG_SYNCHRONOUS) { + trace_smp_call_func_entry(func); func(info); + trace_smp_call_func_exit(func); csd_unlock(csd); } else { csd_unlock(csd); + trace_smp_call_func_entry(func); func(info); + trace_smp_call_func_exit(func); } } @@ -276,6 +285,7 @@ int smp_call_function_single(int cpu, smp_call_func_t func, void *info, int this_cpu; int err; + trace_smp_call_func_send(func, cpu); /* * prevent preemption and reschedule on another processor, * as well as CPU removal |