From 4c168eaf7ea39f25a45a3d8c7eebc3fedb633a1d Mon Sep 17 00:00:00 2001 From: Robert Richter Date: Wed, 24 Sep 2008 11:08:52 +0200 Subject: Revert "Oprofile Multiplexing Patch" Reverting commit 1a960b402a51d80abf54e3f8e4972374ffe5f22d for the main branch. Multiplexing will be tracked on a separate feature branch. Conflicts: arch/x86/oprofile/nmi_int.c --- drivers/oprofile/oprof.c | 58 +++--------------------------------------------- 1 file changed, 3 insertions(+), 55 deletions(-) (limited to 'drivers/oprofile/oprof.c') diff --git a/drivers/oprofile/oprof.c b/drivers/oprofile/oprof.c index b2fa5df64a62..2c645170f06e 100644 --- a/drivers/oprofile/oprof.c +++ b/drivers/oprofile/oprof.c @@ -12,8 +12,6 @@ #include #include #include -#include -#include #include #include "oprof.h" @@ -21,18 +19,13 @@ #include "cpu_buffer.h" #include "buffer_sync.h" #include "oprofile_stats.h" - -static unsigned long is_setup; -static void switch_worker(struct work_struct *work); -static DECLARE_DELAYED_WORK(switch_work, switch_worker); -static DEFINE_MUTEX(start_mutex); struct oprofile_operations oprofile_ops; -unsigned long timeout_jiffies; unsigned long oprofile_started; unsigned long backtrace_depth; -/* Multiplexing defaults at 1 msec*/ +static unsigned long is_setup; +static DEFINE_MUTEX(start_mutex); /* timer 0 - use performance monitoring hardware if available @@ -94,16 +87,6 @@ out: return err; } -static void start_switch_worker(void) -{ - schedule_delayed_work(&switch_work, timeout_jiffies); -} - -static void switch_worker(struct work_struct *work) -{ - if (!oprofile_ops.switch_events()) - start_switch_worker(); -} /* Actually start profiling (echo 1>/dev/oprofile/enable) */ int oprofile_start(void) @@ -111,6 +94,7 @@ int oprofile_start(void) int err = -EINVAL; mutex_lock(&start_mutex); + if (!is_setup) goto out; @@ -124,9 +108,6 @@ int oprofile_start(void) if ((err = oprofile_ops.start())) goto out; - if (oprofile_ops.switch_events) - start_switch_worker(); - oprofile_started = 1; out: mutex_unlock(&start_mutex); @@ -142,7 +123,6 @@ void oprofile_stop(void) goto out; oprofile_ops.stop(); oprofile_started = 0; - cancel_delayed_work_sync(&switch_work); /* wake up the daemon to read what remains */ wake_up_buffer_waiter(); out: @@ -175,32 +155,6 @@ post_sync: mutex_unlock(&start_mutex); } -/* User inputs in ms, converts to jiffies */ -int oprofile_set_timeout(unsigned long val_msec) -{ - int err = 0; - - mutex_lock(&start_mutex); - - if (oprofile_started) { - err = -EBUSY; - goto out; - } - - if (!oprofile_ops.switch_events) { - err = -EINVAL; - goto out; - } - - timeout_jiffies = msecs_to_jiffies(val_msec); - if (timeout_jiffies == MAX_JIFFY_OFFSET) - timeout_jiffies = msecs_to_jiffies(1); - -out: - mutex_unlock(&start_mutex); - return err; - -} int oprofile_set_backtrace(unsigned long val) { @@ -225,16 +179,10 @@ out: return err; } -static void __init oprofile_switch_timer_init(void) -{ - timeout_jiffies = msecs_to_jiffies(1); -} - static int __init oprofile_init(void) { int err; - oprofile_switch_timer_init(); err = oprofile_arch_init(&oprofile_ops); if (err < 0 || timer) { -- cgit v1.2.2