diff options
| author | Antti P Miettinen <amiettinen@nvidia.com> | 2012-03-28 20:42:55 +0300 |
|---|---|---|
| committer | Dan Willemsen <dwillemsen@nvidia.com> | 2013-09-14 01:32:38 -0700 |
| commit | 90c5c20f058c62e593641d042b98c57d80e1f963 (patch) | |
| tree | 4d448bc62190bb554839067c7b8fbec719370442 /kernel | |
| parent | d9799e098c1c711e9108457fab304882446b7361 (diff) | |
tracing: Add tracepoints for hotplug
Simple trace points for measuring hotplug up/down times.
Bug 960310
Change-Id: I1927aae6edb74cba7ca3e9522d138407b48325dc
Signed-off-by: Antti P Miettinen <amiettinen@nvidia.com>
Reviewed-on: http://git-master/r/92920
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Satya Popuri <spopuri@nvidia.com>
Reviewed-by: Diwakar Tundlam <dtundlam@nvidia.com>
Reviewed-by: Juha Tukkinen <jtukkinen@nvidia.com>
Rebase-Id: R9a5ff4f33d9d5f06ea7b4660a6567680398eefb1
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/cpu.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/cpu.c b/kernel/cpu.c index 198a38883e64..d0a9b076a6fb 100644 --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -19,6 +19,7 @@ #include <linux/mutex.h> #include <linux/gfp.h> #include <linux/suspend.h> +#include <trace/events/power.h> #include "smpboot.h" @@ -349,6 +350,8 @@ int __ref cpu_down(unsigned int cpu) { int err; + trace_cpu_hotplug(cpu, POWER_CPU_DOWN_START); + cpu_maps_update_begin(); if (cpu_hotplug_disabled) { @@ -360,6 +363,7 @@ int __ref cpu_down(unsigned int cpu) out: cpu_maps_update_done(); + trace_cpu_hotplug(cpu, POWER_CPU_DOWN_DONE); return err; } EXPORT_SYMBOL(cpu_down); @@ -428,6 +432,8 @@ int __cpuinit cpu_up(unsigned int cpu) pg_data_t *pgdat; #endif + trace_cpu_hotplug(cpu, POWER_CPU_UP_START); + if (!cpu_possible(cpu)) { printk(KERN_ERR "can't online cpu %d because it is not " "configured as may-hotadd at boot time\n", cpu); @@ -471,6 +477,7 @@ int __cpuinit cpu_up(unsigned int cpu) out: cpu_maps_update_done(); + trace_cpu_hotplug(cpu, POWER_CPU_UP_DONE); return err; } EXPORT_SYMBOL_GPL(cpu_up); |