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perf/x86/intel: Support new data source for Lunar Lake

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A new PEBS data source format is introduced for the p-core of Lunar
Lake. The data source field is extended to 8 bits with new encodings.

A new layout is introduced into the union intel_x86_pebs_dse.
Introduce the lnl_latency_data() to parse the new format.
Enlarge the pebs_data_source[] accordingly to include new encodings.

Only the mem load and the mem store events can generate the data source.
Introduce INTEL_HYBRID_LDLAT_CONSTRAINT and
INTEL_HYBRID_STLAT_CONSTRAINT to mark them.

Add two new bits for the new cache-related data src, L2_MHB and MSC.
The L2_MHB is short for L2 Miss Handling Buffer, which is similar to
LFB (Line Fill Buffer), but to track the L2 Cache misses.
The MSC stands for the memory-side cache.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Reviewed-by: Ian Rogers <irogers@google.com>
Link: https://lkml.kernel.org/r/20240626143545.480761-6-kan.liang@linux.intel.com
This commit is contained in:
Kan Liang 2024-06-26 07:35:37 -07:00 committed by Peter Zijlstra
parent 090262439f
commit 608f6976c3
4 changed files with 113 additions and 5 deletions
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2
arch/x86/events/intel/core.c
View File

@ -6960,6 +6960,7 @@ __init int intel_pmu_init(void)
case INTEL_ARROWLAKE:
intel_pmu_init_hybrid(hybrid_big_small);
x86_pmu.pebs_latency_data = lnl_latency_data;
x86_pmu.get_event_constraints = mtl_get_event_constraints;
x86_pmu.hw_config = adl_hw_config;
@ -6977,6 +6978,7 @@ __init int intel_pmu_init(void)
pmu = &x86_pmu.hybrid_pmu[X86_HYBRID_PMU_ATOM_IDX];
intel_pmu_init_skt(&pmu->pmu);
intel_pmu_pebs_data_source_lnl();
pr_cont("Lunarlake Hybrid events, ");
name = "lunarlake_hybrid";
break;

94
arch/x86/events/intel/ds.c
View File

@ -63,6 +63,15 @@ union intel_x86_pebs_dse {
unsigned int mtl_fwd_blk:1;
unsigned int ld_reserved4:24;
};
struct {
unsigned int lnc_dse:8;
unsigned int ld_reserved5:2;
unsigned int lnc_stlb_miss:1;
unsigned int lnc_locked:1;
unsigned int lnc_data_blk:1;
unsigned int lnc_addr_blk:1;
unsigned int ld_reserved6:18;
};
};
@ -77,7 +86,7 @@ union intel_x86_pebs_dse {
#define SNOOP_NONE_MISS (P(SNOOP, NONE) | P(SNOOP, MISS))
/* Version for Sandy Bridge and later */
static u64 pebs_data_source[] = {
static u64 pebs_data_source[PERF_PEBS_DATA_SOURCE_MAX] = {
P(OP, LOAD) | P(LVL, MISS) | LEVEL(L3) | P(SNOOP, NA),/* 0x00:ukn L3 */
OP_LH | P(LVL, L1) | LEVEL(L1) | P(SNOOP, NONE), /* 0x01: L1 local */
OP_LH | P(LVL, LFB) | LEVEL(LFB) | P(SNOOP, NONE), /* 0x02: LFB hit */
@ -173,6 +182,40 @@ void __init intel_pmu_pebs_data_source_cmt(void)
__intel_pmu_pebs_data_source_cmt(pebs_data_source);
}
/* Version for Lion Cove and later */
static u64 lnc_pebs_data_source[PERF_PEBS_DATA_SOURCE_MAX] = {
P(OP, LOAD) | P(LVL, MISS) | LEVEL(L3) | P(SNOOP, NA), /* 0x00: ukn L3 */
OP_LH | P(LVL, L1) | LEVEL(L1) | P(SNOOP, NONE), /* 0x01: L1 hit */
OP_LH | P(LVL, L1) | LEVEL(L1) | P(SNOOP, NONE), /* 0x02: L1 hit */
OP_LH | P(LVL, LFB) | LEVEL(LFB) | P(SNOOP, NONE), /* 0x03: LFB/L1 Miss Handling Buffer hit */
0, /* 0x04: Reserved */
OP_LH | P(LVL, L2) | LEVEL(L2) | P(SNOOP, NONE), /* 0x05: L2 Hit */
OP_LH | LEVEL(L2_MHB) | P(SNOOP, NONE), /* 0x06: L2 Miss Handling Buffer Hit */
0, /* 0x07: Reserved */
OP_LH | P(LVL, L3) | LEVEL(L3) | P(SNOOP, NONE), /* 0x08: L3 Hit */
0, /* 0x09: Reserved */
0, /* 0x0a: Reserved */
0, /* 0x0b: Reserved */
OP_LH | P(LVL, L3) | LEVEL(L3) | P(SNOOPX, FWD), /* 0x0c: L3 Hit Snoop Fwd */
OP_LH | P(LVL, L3) | LEVEL(L3) | P(SNOOP, HITM), /* 0x0d: L3 Hit Snoop HitM */
0, /* 0x0e: Reserved */
P(OP, LOAD) | P(LVL, MISS) | P(LVL, L3) | LEVEL(L3) | P(SNOOP, HITM), /* 0x0f: L3 Miss Snoop HitM */
OP_LH | LEVEL(MSC) | P(SNOOP, NONE), /* 0x10: Memory-side Cache Hit */
OP_LH | P(LVL, LOC_RAM) | LEVEL(RAM) | P(SNOOP, NONE), /* 0x11: Local Memory Hit */
};
void __init intel_pmu_pebs_data_source_lnl(void)
{
u64 *data_source;
data_source = x86_pmu.hybrid_pmu[X86_HYBRID_PMU_CORE_IDX].pebs_data_source;
memcpy(data_source, lnc_pebs_data_source, sizeof(lnc_pebs_data_source));
data_source = x86_pmu.hybrid_pmu[X86_HYBRID_PMU_ATOM_IDX].pebs_data_source;
memcpy(data_source, pebs_data_source, sizeof(pebs_data_source));
__intel_pmu_pebs_data_source_cmt(data_source);
}
static u64 precise_store_data(u64 status)
{
union intel_x86_pebs_dse dse;
@ -264,7 +307,7 @@ static u64 __grt_latency_data(struct perf_event *event, u64 status,
WARN_ON_ONCE(hybrid_pmu(event->pmu)->pmu_type == hybrid_big);
dse &= PERF_PEBS_DATA_SOURCE_MASK;
dse &= PERF_PEBS_DATA_SOURCE_GRT_MASK;
val = hybrid_var(event->pmu, pebs_data_source)[dse];
pebs_set_tlb_lock(&val, tlb, lock);
@ -300,6 +343,51 @@ u64 cmt_latency_data(struct perf_event *event, u64 status)
dse.mtl_fwd_blk);
}
static u64 lnc_latency_data(struct perf_event *event, u64 status)
{
union intel_x86_pebs_dse dse;
union perf_mem_data_src src;
u64 val;
dse.val = status;
/* LNC core latency data */
val = hybrid_var(event->pmu, pebs_data_source)[status & PERF_PEBS_DATA_SOURCE_MASK];
if (!val)
val = P(OP, LOAD) | LEVEL(NA) | P(SNOOP, NA);
if (dse.lnc_stlb_miss)
val |= P(TLB, MISS) | P(TLB, L2);
else
val |= P(TLB, HIT) | P(TLB, L1) | P(TLB, L2);
if (dse.lnc_locked)
val |= P(LOCK, LOCKED);
if (dse.lnc_data_blk)
val |= P(BLK, DATA);
if (dse.lnc_addr_blk)
val |= P(BLK, ADDR);
if (!dse.lnc_data_blk && !dse.lnc_addr_blk)
val |= P(BLK, NA);
src.val = val;
if (event->hw.flags & PERF_X86_EVENT_PEBS_ST_HSW)
src.mem_op = P(OP, STORE);
return src.val;
}
u64 lnl_latency_data(struct perf_event *event, u64 status)
{
struct x86_hybrid_pmu *pmu = hybrid_pmu(event->pmu);
if (pmu->pmu_type == hybrid_small)
return cmt_latency_data(event, status);
return lnc_latency_data(event, status);
}
static u64 load_latency_data(struct perf_event *event, u64 status)
{
union intel_x86_pebs_dse dse;
@ -1090,6 +1178,8 @@ struct event_constraint intel_lnc_pebs_event_constraints[] = {
INTEL_FLAGS_UEVENT_CONSTRAINT(0x100, 0x100000000ULL), /* INST_RETIRED.PREC_DIST */
INTEL_FLAGS_UEVENT_CONSTRAINT(0x0400, 0x800000000ULL),
INTEL_HYBRID_LDLAT_CONSTRAINT(0x1cd, 0x3ff),
INTEL_HYBRID_STLAT_CONSTRAINT(0x2cd, 0x3),
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x11d0, 0xf), /* MEM_INST_RETIRED.STLB_MISS_LOADS */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_ST(0x12d0, 0xf), /* MEM_INST_RETIRED.STLB_MISS_STORES */
INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x21d0, 0xf), /* MEM_INST_RETIRED.LOCK_LOADS */

16
arch/x86/events/perf_event.h
View File

@ -476,6 +476,14 @@ struct cpu_hw_events {
__EVENT_CONSTRAINT(c, n, INTEL_ARCH_EVENT_MASK|X86_ALL_EVENT_FLAGS, \
HWEIGHT(n), 0, PERF_X86_EVENT_PEBS_LAT_HYBRID)
#define INTEL_HYBRID_LDLAT_CONSTRAINT(c, n) \
__EVENT_CONSTRAINT(c, n, INTEL_ARCH_EVENT_MASK|X86_ALL_EVENT_FLAGS, \
HWEIGHT(n), 0, PERF_X86_EVENT_PEBS_LAT_HYBRID|PERF_X86_EVENT_PEBS_LD_HSW)
#define INTEL_HYBRID_STLAT_CONSTRAINT(c, n) \
__EVENT_CONSTRAINT(c, n, INTEL_ARCH_EVENT_MASK|X86_ALL_EVENT_FLAGS, \
HWEIGHT(n), 0, PERF_X86_EVENT_PEBS_LAT_HYBRID|PERF_X86_EVENT_PEBS_ST_HSW)
/* Event constraint, but match on all event flags too. */
#define INTEL_FLAGS_EVENT_CONSTRAINT(c, n) \
EVENT_CONSTRAINT(c, n, ARCH_PERFMON_EVENTSEL_EVENT|X86_ALL_EVENT_FLAGS)
@ -655,8 +663,10 @@ enum {
x86_lbr_exclusive_max,
};
#define PERF_PEBS_DATA_SOURCE_MAX 0x10
#define PERF_PEBS_DATA_SOURCE_MAX 0x100
#define PERF_PEBS_DATA_SOURCE_MASK (PERF_PEBS_DATA_SOURCE_MAX - 1)
#define PERF_PEBS_DATA_SOURCE_GRT_MAX 0x10
#define PERF_PEBS_DATA_SOURCE_GRT_MASK (PERF_PEBS_DATA_SOURCE_GRT_MAX - 1)
enum hybrid_cpu_type {
HYBRID_INTEL_NONE,
@ -1552,6 +1562,8 @@ u64 grt_latency_data(struct perf_event *event, u64 status);
u64 cmt_latency_data(struct perf_event *event, u64 status);
u64 lnl_latency_data(struct perf_event *event, u64 status);
extern struct event_constraint intel_core2_pebs_event_constraints[];
extern struct event_constraint intel_atom_pebs_event_constraints[];
@ -1673,6 +1685,8 @@ void intel_pmu_pebs_data_source_mtl(void);
void intel_pmu_pebs_data_source_cmt(void);
void intel_pmu_pebs_data_source_lnl(void);
int intel_pmu_setup_lbr_filter(struct perf_event *event);
void intel_pt_interrupt(void);

6
include/uapi/linux/perf_event.h
View File

@ -1349,12 +1349,14 @@ union perf_mem_data_src {
#define PERF_MEM_LVLNUM_L2 0x02 /* L2 */
#define PERF_MEM_LVLNUM_L3 0x03 /* L3 */
#define PERF_MEM_LVLNUM_L4 0x04 /* L4 */
/* 5-0x7 available */
#define PERF_MEM_LVLNUM_L2_MHB 0x05 /* L2 Miss Handling Buffer */
#define PERF_MEM_LVLNUM_MSC 0x06 /* Memory-side Cache */
/* 0x7 available */
#define PERF_MEM_LVLNUM_UNC 0x08 /* Uncached */
#define PERF_MEM_LVLNUM_CXL 0x09 /* CXL */
#define PERF_MEM_LVLNUM_IO 0x0a /* I/O */
#define PERF_MEM_LVLNUM_ANY_CACHE 0x0b /* Any cache */
#define PERF_MEM_LVLNUM_LFB 0x0c /* LFB */
#define PERF_MEM_LVLNUM_LFB 0x0c /* LFB / L1 Miss Handling Buffer */
#define PERF_MEM_LVLNUM_RAM 0x0d /* RAM */
#define PERF_MEM_LVLNUM_PMEM 0x0e /* PMEM */
#define PERF_MEM_LVLNUM_NA 0x0f /* N/A */