| Message ID | 20181004062337.14252-1-anton@ozlabs.org (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | 5b2a15296210d3b70e06d0f09a8e701ff74ccbe8 |
| Headers | show |
| Series | powerpc: Add doorbell tracepoints | expand |
| Context | Check | Description |
|---|---|---|
| snowpatch_ozlabs/apply_patch | success | next/apply_patch Successfully applied |
| snowpatch_ozlabs/checkpatch | warning | Test checkpatch on branch next |
| snowpatch_ozlabs/build-ppc64le | fail | Test build-ppc64le on branch next |
| snowpatch_ozlabs/build-ppc64be | fail | Test build-ppc64be on branch next |
| snowpatch_ozlabs/build-ppc64e | fail | Test build-ppc64e on branch next |
| snowpatch_ozlabs/build-ppc32 | success | Test build-ppc32 on branch next |
diff --git a/arch/powerpc/include/asm/trace.h b/arch/powerpc/include/asm/trace.h index d018e8602694..2f1f8cd7b6c8 100644 --- a/arch/powerpc/include/asm/trace.h +++ b/arch/powerpc/include/asm/trace.h @@ -54,6 +54,22 @@ DEFINE_EVENT(ppc64_interrupt_class, timer_interrupt_exit, TP_ARGS(regs) ); +#ifdef CONFIG_PPC_DOORBELL +DEFINE_EVENT(ppc64_interrupt_class, doorbell_entry, + + TP_PROTO(struct pt_regs *regs), + + TP_ARGS(regs) +); + +DEFINE_EVENT(ppc64_interrupt_class, doorbell_exit, + + TP_PROTO(struct pt_regs *regs), + + TP_ARGS(regs) +); +#endif + #ifdef CONFIG_PPC_PSERIES extern int hcall_tracepoint_regfunc(void); extern void hcall_tracepoint_unregfunc(void); diff --git a/arch/powerpc/kernel/dbell.c b/arch/powerpc/kernel/dbell.c index b6fe883b1016..5ec3b3835925 100644 --- a/arch/powerpc/kernel/dbell.c +++ b/arch/powerpc/kernel/dbell.c @@ -18,6 +18,7 @@ #include <asm/dbell.h> #include <asm/irq_regs.h> #include <asm/kvm_ppc.h> +#include <asm/trace.h> #ifdef CONFIG_SMP @@ -81,6 +82,7 @@ void doorbell_exception(struct pt_regs *regs) struct pt_regs *old_regs = set_irq_regs(regs); irq_enter(); + trace_doorbell_entry(regs); ppc_msgsync(); @@ -91,6 +93,7 @@ void doorbell_exception(struct pt_regs *regs) smp_ipi_demux_relaxed(); /* already performed the barrier */ + trace_doorbell_exit(regs); irq_exit(); set_irq_regs(old_regs); }
When analysing sources of OS jitter, I noticed that doorbells cannot be traced. Signed-off-by: Anton Blanchard <anton@ozlabs.org> --- arch/powerpc/include/asm/trace.h | 16 ++++++++++++++++ arch/powerpc/kernel/dbell.c | 3 +++ 2 files changed, 19 insertions(+)