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Date: Fri, 22 Jan 2010 22:05:07 +0330
From: Ali Gholami Rudi <ali@...i.ir>
To: linux-acpi@...r.kernel.org
Cc: Alexey Starikovskiy <astarikovskiy@...e.de>,
Len Brown <lenb@...nel.org>, linux-kernel@...r.kernel.org
Subject: kacpi_notify_wq and kacpid_wq use a lot of cpu
Hi,
Sometimes kacpi_notify_wq and kacpid_wq workqueues use a lot of cpu.
I'm using yesterday's tip. At times kacpi_notify_wq uses 30-50% of
my cpu and kacpid_wq uses 3-5%:
# uptime
12:49:54 up 4:16, 1 user, load average: 0.52, 0.55, 0.40
# ps -e | grep kacpi
189 ? 00:00:52 kacpid
190 ? 00:10:26 kacpi_notify
191 ? 00:00:00 kacpi_hotplug
This sometimes happens after a few hours of uptime; so this is
very hard to bisect (by the way, I think the same thing causes
the fans to work fullspeed sometimes when I reboot the machine).
I tried this patch to find out which of the callers of
acpi_os_execute() is the culprit:
=== patch ====
diff --git a/drivers/acpi/acpica/evgpe.c b/drivers/acpi/acpica/evgpe.c
index afacf44..eded044 100644
--- a/drivers/acpi/acpica/evgpe.c
+++ b/drivers/acpi/acpica/evgpe.c
@@ -504,6 +504,7 @@ static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context)
acpi_status status;
struct acpi_gpe_event_info local_gpe_event_info;
struct acpi_evaluate_info *info;
+ printk("acpi_ev_asynch_execute_gpe_method\n");
ACPI_FUNCTION_TRACE(ev_asynch_execute_gpe_method);
@@ -577,6 +578,7 @@ static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context)
static void acpi_ev_asynch_enable_gpe(void *context)
{
struct acpi_gpe_event_info *gpe_event_info = context;
+ printk("acpi_ev_asynch_enable_gpe\n");
acpi_status status;
if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) ==
ACPI_GPE_LEVEL_TRIGGERED) {
diff --git a/drivers/acpi/acpica/evmisc.c b/drivers/acpi/acpica/evmisc.c
index ce224e1..e2307d1 100644
--- a/drivers/acpi/acpica/evmisc.c
+++ b/drivers/acpi/acpica/evmisc.c
@@ -224,6 +224,7 @@ static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context)
acpi_notify_handler global_handler = NULL;
void *global_context = NULL;
union acpi_operand_object *handler_obj;
+ printk("acpi_ev_notify_dispatch\n");
ACPI_FUNCTION_ENTRY();
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index fd1801b..f3d8cc1 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -514,6 +514,7 @@ static void acpi_ec_gpe_query(void *ec_cxt)
struct acpi_ec *ec = ec_cxt;
u8 value = 0;
struct acpi_ec_query_handler *handler, copy;
+ printk("acpi_ec_gpe_query\n");
if (!ec || acpi_ec_query(ec, &value))
return;
diff --git a/drivers/acpi/sbshc.c b/drivers/acpi/sbshc.c
index d933980..99f39db 100644
--- a/drivers/acpi/sbshc.c
+++ b/drivers/acpi/sbshc.c
@@ -217,6 +217,7 @@ EXPORT_SYMBOL_GPL(acpi_smbus_unregister_callback);
static inline void acpi_smbus_callback(void *context)
{
struct acpi_smb_hc *hc = context;
+ printk("acpi_smbus_callback\n");
if (hc->callback)
hc->callback(hc->context);
}
=== patch ====
This was produced when the kacpi_notify high cpu usage happened:
=== dmesg ====
..
[12786.473794] acpi_ev_asynch_enable_gpe
[12786.473803] acpi_ev_notify_dispatch
[12786.476741] acpi_ev_asynch_execute_gpe_method
[12786.477109] acpi_ev_notify_dispatch
[12786.482973] acpi_ev_asynch_enable_gpe
[12786.482982] acpi_ev_notify_dispatch
[12786.483033] acpi_ev_asynch_execute_gpe_method
[12786.489049] acpi_ev_notify_dispatch
[12786.494038] acpi_ev_asynch_enable_gpe
[12786.494083] acpi_ev_asynch_execute_gpe_method
[12786.494434] acpi_ev_notify_dispatch
[12786.496798] acpi_ev_asynch_enable_gpe
[12786.496845] acpi_ev_asynch_execute_gpe_method
[12786.497210] acpi_ev_notify_dispatch
[12786.503034] acpi_ev_asynch_enable_gpe
[12786.503043] acpi_ev_notify_dispatch
[12786.504363] acpi_ev_asynch_execute_gpe_method
[12786.505198] acpi_ev_notify_dispatch
[12786.511051] acpi_ev_asynch_enable_gpe
[12786.511093] acpi_ev_notify_dispatch
[12786.511100] acpi_ev_asynch_execute_gpe_method
[12786.517091] acpi_ev_notify_dispatch
[12786.518697] acpi_ev_asynch_enable_gpe
[12786.518706] acpi_ev_notify_dispatch
[12786.524051] acpi_ev_asynch_execute_gpe_method
[12786.524409] acpi_ev_notify_dispatch
[12786.530079] acpi_ev_asynch_enable_gpe
[12786.530089] acpi_ev_notify_dispatch
[12786.530128] acpi_ev_asynch_execute_gpe_method
[12786.536094] acpi_ev_notify_dispatch
[12786.537761] acpi_ev_asynch_enable_gpe
[12786.537770] acpi_ev_notify_dispatch
[12786.537936] acpi_ev_asynch_execute_gpe_method
[12786.543131] acpi_ev_notify_dispatch
[12786.545642] acpi_ev_asynch_enable_gpe
[12786.545651] acpi_ev_notify_dispatch
[12786.545692] acpi_ev_asynch_execute_gpe_method
[12786.552133] acpi_ev_notify_dispatch
[12786.557167] acpi_ev_asynch_enable_gpe
[12786.557176] acpi_ev_notify_dispatch
[12786.557215] acpi_ev_asynch_execute_gpe_method
[12786.560062] acpi_ev_notify_dispatch
[12786.565185] acpi_ev_asynch_enable_gpe
[12786.565227] acpi_ev_notify_dispatch
[12786.565234] acpi_ev_asynch_execute_gpe_method
[12786.571202] acpi_ev_notify_dispatch
[12786.572811] acpi_ev_asynch_enable_gpe
[12786.575307] acpi_ev_asynch_execute_gpe_method
[12786.575664] acpi_ev_notify_dispatch
[12786.581250] acpi_ev_asynch_enable_gpe
[12786.581260] acpi_ev_notify_dispatch
[12786.581307] acpi_ev_asynch_execute_gpe_method
[12786.587251] acpi_ev_notify_dispatch
[12786.588854] acpi_ev_asynch_enable_gpe
[12786.588863] acpi_ev_notify_dispatch
[12786.822334] acpi_ev_asynch_execute_gpe_method
[12786.822710] acpi_ev_notify_dispatch
[12786.828829] acpi_ev_asynch_enable_gpe
[12786.828838] acpi_ev_notify_dispatch
[12786.828881] acpi_ev_asynch_execute_gpe_method
[12786.833867] acpi_ev_notify_dispatch
[12786.836233] acpi_ev_asynch_enable_gpe
[12786.836242] acpi_ev_notify_dispatch
[12786.957678] acpi_ev_asynch_execute_gpe_method
[12786.958065] acpi_ev_notify_dispatch
[12786.964196] acpi_ev_asynch_enable_gpe
[12786.964205] acpi_ev_notify_dispatch
[12786.964244] acpi_ev_asynch_execute_gpe_method
[12786.970213] acpi_ev_notify_dispatch
[12786.971816] acpi_ev_asynch_enable_gpe
[12786.971825] acpi_ev_notify_dispatch
[12786.997100] acpi_ev_asynch_execute_gpe_method
[12786.997472] acpi_ev_notify_dispatch
[12787.003279] acpi_ev_asynch_enable_gpe
[12787.003290] acpi_ev_notify_dispatch
[12787.003317] acpi_ev_asynch_execute_gpe_method
[12787.008331] acpi_ev_notify_dispatch
[12787.010682] acpi_ev_asynch_enable_gpe
[12787.010692] acpi_ev_notify_dispatch
[12787.309017] acpi_ev_asynch_execute_gpe_method
[12787.313035] acpi_ev_notify_dispatch
[12787.315300] acpi_ev_asynch_enable_gpe
[12787.319026] acpi_ev_asynch_execute_gpe_method
[12787.319387] acpi_ev_notify_dispatch
[12787.326065] acpi_ev_asynch_enable_gpe
[12787.326075] acpi_ev_notify_dispatch
[12787.326113] acpi_ev_asynch_execute_gpe_method
[12787.332078] acpi_ev_notify_dispatch
[12787.333685] acpi_ev_asynch_enable_gpe
[12787.333694] acpi_ev_notify_dispatch
[12788.338728] acpi_ev_asynch_execute_gpe_method
[12788.339140] acpi_ev_notify_dispatch
[12788.345606] acpi_ev_asynch_enable_gpe
[12788.345616] acpi_ev_notify_dispatch
[12788.345660] acpi_ev_asynch_execute_gpe_method
[12788.350599] acpi_ev_notify_dispatch
[12788.352955] acpi_ev_asynch_enable_gpe
[12788.352965] acpi_ev_notify_dispatch
[12789.646199] acpi_ev_asynch_execute_gpe_method
[12789.646595] acpi_ev_notify_dispatch
[12789.652861] acpi_ev_asynch_enable_gpe
[12789.652871] acpi_ev_notify_dispatch
[12789.652913] acpi_ev_asynch_execute_gpe_method
[12789.658870] acpi_ev_notify_dispatch
[12789.660495] acpi_ev_asynch_enable_gpe
[12789.660505] acpi_ev_notify_dispatch
[12791.535774] acpi_ev_asynch_execute_gpe_method
[12791.536210] acpi_ev_notify_dispatch
[12791.542525] acpi_ev_asynch_enable_gpe
[12791.542535] acpi_ev_notify_dispatch
[12791.542580] acpi_ev_asynch_execute_gpe_method
[12791.547545] acpi_ev_notify_dispatch
[12791.549935] acpi_ev_asynch_enable_gpe
[12791.549944] acpi_ev_notify_dispatch
[12791.593592] acpi_ev_asynch_execute_gpe_method
[12791.593976] acpi_ev_notify_dispatch
[12791.599677] acpi_ev_asynch_enable_gpe
[12791.599686] acpi_ev_notify_dispatch
[12791.599730] acpi_ev_asynch_execute_gpe_method
[12791.604667] acpi_ev_notify_dispatch
[12791.607042] acpi_ev_asynch_enable_gpe
[12791.607052] acpi_ev_notify_dispatch
[12791.672433] acpi_ev_asynch_execute_gpe_method
[12791.672801] acpi_ev_notify_dispatch
[12791.678850] acpi_ev_asynch_enable_gpe
[12791.678859] acpi_ev_notify_dispatch
[12791.678902] acpi_ev_asynch_execute_gpe_method
[12791.683884] acpi_ev_notify_dispatch
[12791.686249] acpi_ev_asynch_enable_gpe
[12791.686259] acpi_ev_notify_dispatch
[12791.689514] acpi_ev_asynch_execute_gpe_method
[12791.689868] acpi_ev_notify_dispatch
[12791.696055] acpi_ev_asynch_enable_gpe
[12791.696064] acpi_ev_notify_dispatch
[12791.696103] acpi_ev_asynch_execute_gpe_method
[12791.701927] acpi_ev_notify_dispatch
[12791.703545] acpi_ev_asynch_enable_gpe
[12791.703554] acpi_ev_notify_dispatch
[12791.705273] acpi_ev_asynch_execute_gpe_method
[12791.705698] acpi_ev_notify_dispatch
[12791.711953] acpi_ev_asynch_enable_gpe
[12791.711962] acpi_ev_notify_dispatch
[12791.712031] acpi_ev_asynch_execute_gpe_method
[12791.716945] acpi_ev_notify_dispatch
[12791.719313] acpi_ev_asynch_enable_gpe
[12791.719322] acpi_ev_notify_dispatch
=== dmesg ====
Is there something I can do to trace the problem? dmesg and lspci
are attached.
Thanks,
Ali
View attachment "dmesg" of type "text/plain" (37147 bytes)
View attachment "lspci" of type "text/plain" (6892 bytes)
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