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sched: walt: Add AMU based instructions and cycle counts

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Add AMU based cycle and instruction counts to sched_switch_with_ctrs
tracepoint. This will help get cycle and instruction counts if the
AMUs are supported by hardware.

Change-Id: Ia014b6b5afb143f4f790350843f37ae479075ae7
Signed-off-by: Rishabh Bhatnagar <rishabhb@codeaurora.org>
This commit is contained in:
Rishabh Bhatnagar 2021-06-28 19:49:01 -07:00 committed by Rishabh Bhatnagar
parent 6c47bb351e
commit a07c897772
2 changed files with 24 additions and 2 deletions
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25
kernel/sched/walt/perf_trace_counters.h
View File

@ -19,6 +19,7 @@
#define C5 0x20
#define C_ALL (CC | C0 | C1 | C2 | C3 | C4 | C5)
#define NUM_L1_CTRS 6
#define NUM_AMU_CTRS 2
#include <linux/sched.h>
#include <linux/cpumask.h>
@ -27,6 +28,7 @@
DECLARE_PER_CPU(u32, cntenset_val);
DECLARE_PER_CPU(u32, previous_ccnt);
DECLARE_PER_CPU(u32[NUM_L1_CTRS], previous_l1_cnts);
DECLARE_PER_CPU(u64[NUM_AMU_CTRS], previous_amu_cnts);
TRACE_EVENT(sched_switch_with_ctrs,
TP_PROTO(pid_t prev, pid_t next),
@ -43,6 +45,8 @@ TRACE_EVENT(sched_switch_with_ctrs,
__field(u32, ctr3)
__field(u32, ctr4)
__field(u32, ctr5)
__field(u64, amu0)
__field(u64, amu1)
),
TP_fast_assign(
@ -51,7 +55,9 @@ TRACE_EVENT(sched_switch_with_ctrs,
u32 cnten_val;
u32 total_ccnt = 0;
u32 total_cnt = 0;
u64 amu_cnt = 0;
u32 delta_l1_cnts[NUM_L1_CTRS];
u64 delta_amu_cnts[NUM_AMU_CTRS] = {0};
__entry->old_pid = prev;
__entry->new_pid = next;
@ -80,20 +86,35 @@ TRACE_EVENT(sched_switch_with_ctrs,
delta_l1_cnts[i] = 0;
}
if (IS_ENABLED(CONFIG_ARM64_AMU_EXTN)) {
amu_cnt = read_sysreg_s(SYS_AMEVCNTR0_CORE_EL0);
delta_amu_cnts[0] = amu_cnt -
per_cpu(previous_amu_cnts[0], cpu);
per_cpu(previous_amu_cnts[0], cpu) = amu_cnt;
amu_cnt = read_sysreg_s(SYS_AMEVCNTR0_INST_RET_EL0);
delta_amu_cnts[1] = amu_cnt -
per_cpu(previous_amu_cnts[1], cpu);
per_cpu(previous_amu_cnts[1], cpu) = amu_cnt;
}
__entry->ctr0 = delta_l1_cnts[0];
__entry->ctr1 = delta_l1_cnts[1];
__entry->ctr2 = delta_l1_cnts[2];
__entry->ctr3 = delta_l1_cnts[3];
__entry->ctr4 = delta_l1_cnts[4];
__entry->ctr5 = delta_l1_cnts[5];
__entry->amu0 = delta_amu_cnts[0];
__entry->amu1 = delta_amu_cnts[1];
),
TP_printk("prev_pid=%d, next_pid=%d, CCNTR: %u, CTR0: %u, CTR1: %u, CTR2: %u, CTR3: %u, CTR4: %u, CTR5: %u",
TP_printk("prev_pid=%d, next_pid=%d, CCNTR: %u, CTR0: %u, CTR1: %u, CTR2: %u, CTR3: %u, CTR4: %u, CTR5: %u, CYC: %llu, INST: %llu",
__entry->old_pid, __entry->new_pid,
__entry->cctr,
__entry->ctr0, __entry->ctr1,
__entry->ctr2, __entry->ctr3,
__entry->ctr4, __entry->ctr5)
__entry->ctr4, __entry->ctr5,
__entry->amu0, __entry->amu1)
);
#endif

1
kernel/sched/walt/walt_tp.c
View File

@ -17,6 +17,7 @@ unsigned int sysctl_sched_dynamic_tp_enable;
DEFINE_PER_CPU(u32, cntenset_val);
DEFINE_PER_CPU(u32, previous_ccnt);
DEFINE_PER_CPU(u32[NUM_L1_CTRS], previous_l1_cnts);
DEFINE_PER_CPU(u64[NUM_AMU_CTRS], previous_amu_cnts);
DEFINE_PER_CPU(u32, old_pid);
DEFINE_PER_CPU(u32, hotplug_flag);