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author | Jungseok Lee <jungseoklee85@gmail.com> | 2015-08-12 15:16:19 +0100 |
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committer | Will Deacon <will.deacon@arm.com> | 2015-08-12 17:23:45 +0100 |
commit | 9a5ad7d0e3e1c6c0c11df89fbc5376f8aaf7a90f (patch) | |
tree | 1f70eedb91c32649b1324188e985351a082d52a8 /arch/arm64/Kconfig | |
parent | d422e62562e0dcef0ace4cd4fc4b4519d0a55ab4 (diff) | |
download | linux-9a5ad7d0e3e1c6c0c11df89fbc5376f8aaf7a90f.tar.gz linux-9a5ad7d0e3e1c6c0c11df89fbc5376f8aaf7a90f.tar.bz2 linux-9a5ad7d0e3e1c6c0c11df89fbc5376f8aaf7a90f.zip |
arm64: Add __exception_irq_entry definition for function graph
The gic_handle_irq() is defined with __exception_irq_entry attribute.
A single remaining work is to add its definition as ARM did. Below
shows how function graph data is changed with these hunks.
A prologue of an interrupt handler is drawn as follows.
- current status
0) 0.208 us | cpuidle_not_available();
0) | default_idle_call() {
0) | arch_cpu_idle() {
0) | __handle_domain_irq() {
0) | irq_enter() {
0) 0.313 us | rcu_irq_enter();
0) 0.261 us | __local_bh_disable_ip();
- with this change
0) 0.625 us | cpuidle_not_available();
0) | default_idle_call() {
0) | arch_cpu_idle() {
0) ==========> |
0) | gic_handle_irq() {
0) | __handle_domain_irq() {
0) | irq_enter() {
0) 0.885 us | rcu_irq_enter();
0) 0.781 us | __local_bh_disable_ip();
An epilogue of an interrupt handler is recorded as follows.
- current status
0) 0.261 us | idle_cpu();
0) | rcu_irq_exit() {
0) 0.521 us | rcu_eqs_enter_common.isra.46();
0) 2.552 us | }
0) ! 322.448 us | }
0) ! 583.437 us | }
0) # 1656.041 us | }
0) # 1658.073 us | }
- with this change
0) 0.677 us | idle_cpu();
0) | rcu_irq_exit() {
0) 1.770 us | rcu_eqs_enter_common.isra.46();
0) 7.968 us | }
0) # 1803.541 us | }
0) # 2626.667 us | }
0) # 2632.969 us | }
0) <========== |
0) # 14425.00 us | }
0) # 14430.98 us | }
Cc: AKASHI Takahiro <takahiro.akashi@linaro.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Rabin Vincent <rabin@rab.in>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Jungseok Lee <jungseoklee85@gmail.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/Kconfig')
0 files changed, 0 insertions, 0 deletions