RISC-V: paravirt: pvqspinlock: Add trace point for pv_kick/wait
Add trace point for pv_kick/wait, here is the output: entries-in-buffer/entries-written: 33927/33927 #P:12 _-----=> irqs-off/BH-disabled / _----=> need-resched | / _---=> hardirq/softirq || / _--=> preempt-depth ||| / _-=> migrate-disable |||| / delay TASK-PID CPU# ||||| TIMESTAMP FUNCTION | | | ||||| | | sh-100 [001] d..2. 28.312294: pv_wait: cpu 1 out of wfi <idle>-0 [000] d.h4. 28.322030: pv_kick: cpu 0 kick target cpu 1 sh-100 [001] d..2. 30.982631: pv_wait: cpu 1 out of wfi <idle>-0 [000] d.h4. 30.993289: pv_kick: cpu 0 kick target cpu 1 sh-100 [002] d..2. 44.987573: pv_wait: cpu 2 out of wfi <idle>-0 [000] d.h4. 44.989000: pv_kick: cpu 0 kick target cpu 2 <idle>-0 [003] d.s3. 51.593978: pv_kick: cpu 3 kick target cpu 4 rcu_sched-15 [004] d..2. 51.595192: pv_wait: cpu 4 out of wfi lock_torture_wr-115 [004] ...2. 52.656482: pv_kick: cpu 4 kick target cpu 2 lock_torture_wr-113 [002] d..2. 52.659146: pv_wait: cpu 2 out of wfi lock_torture_wr-114 [008] d..2. 52.659507: pv_wait: cpu 8 out of wfi lock_torture_wr-114 [008] d..2. 52.663503: pv_wait: cpu 8 out of wfi lock_torture_wr-113 [002] ...2. 52.666128: pv_kick: cpu 2 kick target cpu 8 lock_torture_wr-114 [008] d..2. 52.667261: pv_wait: cpu 8 out of wfi lock_torture_wr-114 [009] .n.2. 53.141515: pv_kick: cpu 9 kick target cpu 11 lock_torture_wr-113 [002] d..2. 53.143339: pv_wait: cpu 2 out of wfi lock_torture_wr-116 [007] d..2. 53.143412: pv_wait: cpu 7 out of wfi lock_torture_wr-118 [000] d..2. 53.143457: pv_wait: cpu 0 out of wfi lock_torture_wr-115 [008] d..2. 53.143481: pv_wait: cpu 8 out of wfi lock_torture_wr-117 [011] d..2. 53.143522: pv_wait: cpu 11 out of wfi lock_torture_wr-117 [011] ...2. 53.143987: pv_kick: cpu 11 kick target cpu 8 lock_torture_wr-115 [008] ...2. 53.144269: pv_kick: cpu 8 kick target cpu 7 Signed-off-by:Guo Ren <guoren@linux.alibaba.com> Signed-off-by:
Guo Ren <guoren@kernel.org>
parent
acc1f81b
Please register or sign in to comment