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freebsd-dev/sys/dev/hwpmc/hwpmc_e500.c
Matt Macy e6b475e0af hwpmc(9): Make pmclog buffer pcpu and update constants 
On non-trivial SMP systems the contention on the pmc_owner mutex leads
to a substantial number of samples captured being from the pmc process
itself. This change a) makes buffers larger to avoid contention on the
global list b) makes the working sample buffer per cpu.

Run pmcstat in the background (default event rate of 64k):
pmcstat -S UNHALTED_CORE_CYCLES -O /dev/null sleep 600 &

Before:
make -j96 buildkernel -s >&/dev/null 3336.68s user 24684.10s system 7442% cpu 6:16.50 total

After:
make -j96 buildkernel -s >&/dev/null 2697.82s user 1347.35s system 6058% cpu 1:06.77 total

For more realistic overhead measurement set the sample rate for ~2khz
on a 2.1Ghz processor:
pmcstat -n 1050000 -S UNHALTED_CORE_CYCLES -O /dev/null sleep 6000 &

Collecting 10 samples of `make -j96 buildkernel` from each:

x before
+ after

real time:
    N           Min           Max        Median           Avg        Stddev
x  10          76.4        127.62        84.845        88.577     15.100031
+  10         59.71         60.79        60.135        60.179    0.29957192
Difference at 95.0% confidence
        -28.398 +/- 10.0344
        -32.0602% +/- 7.69825%
        (Student's t, pooled s = 10.6794)

system time:
    N           Min           Max        Median           Avg        Stddev
x  10       2277.96       6948.53       2949.47      3341.492     1385.2677
+  10        1038.7       1081.06      1070.555      1064.017      15.85404
Difference at 95.0% confidence
        -2277.47 +/- 920.425
        -68.1574% +/- 8.77623%
        (Student's t, pooled s = 979.596)

x no pmc
+ pmc running
real time:

HEAD:
    N           Min           Max        Median           Avg        Stddev
x  10         58.38         59.15         58.86        58.847    0.22504567
+  10          76.4        127.62        84.845        88.577     15.100031
Difference at 95.0% confidence
        29.73 +/- 10.0335
        50.5208% +/- 17.0525%
        (Student's t, pooled s = 10.6785)

patched:
    N           Min           Max        Median           Avg        Stddev
x  10         58.38         59.15         58.86        58.847    0.22504567
+  10         59.71         60.79        60.135        60.179    0.29957192
Difference at 95.0% confidence
        1.332 +/- 0.248939
        2.2635% +/- 0.426506%
        (Student's t, pooled s = 0.264942)

system time:

HEAD:
    N           Min           Max        Median           Avg        Stddev
x  10       1010.15       1073.31      1025.465      1031.524     18.135705
+  10       2277.96       6948.53       2949.47      3341.492     1385.2677
Difference at 95.0% confidence
        2309.97 +/- 920.443
        223.937% +/- 89.3039%
        (Student's t, pooled s = 979.616)

patched:
    N           Min           Max        Median           Avg        Stddev
x  10       1010.15       1073.31      1025.465      1031.524     18.135705
+  10        1038.7       1081.06      1070.555      1064.017      15.85404
Difference at 95.0% confidence
        32.493 +/- 16.0042
        3.15% +/- 1.5794%
        (Student's t, pooled s = 17.0331)

Reviewed by:	jeff@
Approved by:	sbruno@
Differential Revision:	https://reviews.freebsd.org/D15155
2018-05-12 01:26:34 +00:00

662 lines
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/*-
* Copyright (c) 2015 Justin Hibbits
* Copyright (c) 2005, Joseph Koshy
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/pmc.h>
#include <sys/pmckern.h>
#include <sys/systm.h>
#include <machine/pmc_mdep.h>
#include <machine/cpu.h>
#include <ddb/ddb.h>
#include "hwpmc_powerpc.h"
#define POWERPC_PMC_CAPS (PMC_CAP_INTERRUPT | PMC_CAP_USER | \
PMC_CAP_SYSTEM | PMC_CAP_EDGE | \
PMC_CAP_THRESHOLD | PMC_CAP_READ | \
PMC_CAP_WRITE | PMC_CAP_INVERT | \
PMC_CAP_QUALIFIER)
#define E500_PMC_HAS_OVERFLOWED(x) (e500_pmcn_read(x) & (0x1 << 31))
struct e500_event_code_map {
enum pmc_event pe_ev; /* enum value */
uint8_t pe_counter_mask; /* Which counter this can be counted in. */
uint8_t pe_code; /* numeric code */
uint8_t pe_cpu; /* e500 core (v1,v2,mc), mask */
};
#define E500_MAX_PMCS 4
#define PMC_PPC_MASK0 0
#define PMC_PPC_MASK1 1
#define PMC_PPC_MASK2 2
#define PMC_PPC_MASK3 3
#define PMC_PPC_MASK_ALL 0x0f
#define PMC_PPC_E500V1 1
#define PMC_PPC_E500V2 2
#define PMC_PPC_E500MC 4
#define PMC_PPC_E500_ANY 7
#define PMC_E500_EVENT(id, mask, number, core) \
[PMC_EV_E500_##id - PMC_EV_E500_FIRST] = \
{ .pe_ev = PMC_EV_E500_##id, .pe_counter_mask = mask, \
.pe_code = number, .pe_cpu = core }
#define PMC_E500MC_ONLY(id, number) \
PMC_E500_EVENT(id, PMC_PPC_MASK_ALL, number, PMC_PPC_E500MC)
#define PMC_E500_COMMON(id, number) \
PMC_E500_EVENT(id, PMC_PPC_MASK_ALL, number, PMC_PPC_E500_ANY)
static struct e500_event_code_map e500_event_codes[] = {
PMC_E500_COMMON(CYCLES, 1),
PMC_E500_COMMON(INSTR_COMPLETED, 2),
PMC_E500_COMMON(UOPS_COMPLETED, 3),
PMC_E500_COMMON(INSTR_FETCHED, 4),
PMC_E500_COMMON(UOPS_DECODED, 5),
PMC_E500_COMMON(PM_EVENT_TRANSITIONS, 6),
PMC_E500_COMMON(PM_EVENT_CYCLES, 7),
PMC_E500_COMMON(BRANCH_INSTRS_COMPLETED, 8),
PMC_E500_COMMON(LOAD_UOPS_COMPLETED, 9),
PMC_E500_COMMON(STORE_UOPS_COMPLETED, 10),
PMC_E500_COMMON(CQ_REDIRECTS, 11),
PMC_E500_COMMON(BRANCHES_FINISHED, 12),
PMC_E500_COMMON(TAKEN_BRANCHES_FINISHED, 13),
PMC_E500_COMMON(FINISHED_UNCOND_BRANCHES_MISS_BTB, 14),
PMC_E500_COMMON(BRANCH_MISPRED, 15),
PMC_E500_COMMON(BTB_BRANCH_MISPRED_FROM_DIRECTION, 16),
PMC_E500_COMMON(BTB_HITS_PSEUDO_HITS, 17),
PMC_E500_COMMON(CYCLES_DECODE_STALLED, 18),
PMC_E500_COMMON(CYCLES_ISSUE_STALLED, 19),
PMC_E500_COMMON(CYCLES_BRANCH_ISSUE_STALLED, 20),
PMC_E500_COMMON(CYCLES_SU1_SCHED_STALLED, 21),
PMC_E500_COMMON(CYCLES_SU2_SCHED_STALLED, 22),
PMC_E500_COMMON(CYCLES_MU_SCHED_STALLED, 23),
PMC_E500_COMMON(CYCLES_LRU_SCHED_STALLED, 24),
PMC_E500_COMMON(CYCLES_BU_SCHED_STALLED, 25),
PMC_E500_COMMON(TOTAL_TRANSLATED, 26),
PMC_E500_COMMON(LOADS_TRANSLATED, 27),
PMC_E500_COMMON(STORES_TRANSLATED, 28),
PMC_E500_COMMON(TOUCHES_TRANSLATED, 29),
PMC_E500_COMMON(CACHEOPS_TRANSLATED, 30),
PMC_E500_COMMON(CACHE_INHIBITED_ACCESS_TRANSLATED, 31),
PMC_E500_COMMON(GUARDED_LOADS_TRANSLATED, 32),
PMC_E500_COMMON(WRITE_THROUGH_STORES_TRANSLATED, 33),
PMC_E500_COMMON(MISALIGNED_LOAD_STORE_ACCESS_TRANSLATED, 34),
PMC_E500_COMMON(TOTAL_ALLOCATED_TO_DLFB, 35),
PMC_E500_COMMON(LOADS_TRANSLATED_ALLOCATED_TO_DLFB, 36),
PMC_E500_COMMON(STORES_COMPLETED_ALLOCATED_TO_DLFB, 37),
PMC_E500_COMMON(TOUCHES_TRANSLATED_ALLOCATED_TO_DLFB, 38),
PMC_E500_COMMON(STORES_COMPLETED, 39),
PMC_E500_COMMON(DATA_L1_CACHE_LOCKS, 40),
PMC_E500_COMMON(DATA_L1_CACHE_RELOADS, 41),
PMC_E500_COMMON(DATA_L1_CACHE_CASTOUTS, 42),
PMC_E500_COMMON(LOAD_MISS_DLFB_FULL, 43),
PMC_E500_COMMON(LOAD_MISS_LDQ_FULL, 44),
PMC_E500_COMMON(LOAD_GUARDED_MISS, 45),
PMC_E500_COMMON(STORE_TRANSLATE_WHEN_QUEUE_FULL, 46),
PMC_E500_COMMON(ADDRESS_COLLISION, 47),
PMC_E500_COMMON(DATA_MMU_MISS, 48),
PMC_E500_COMMON(DATA_MMU_BUSY, 49),
PMC_E500_COMMON(PART2_MISALIGNED_CACHE_ACCESS, 50),
PMC_E500_COMMON(LOAD_MISS_DLFB_FULL_CYCLES, 51),
PMC_E500_COMMON(LOAD_MISS_LDQ_FULL_CYCLES, 52),
PMC_E500_COMMON(LOAD_GUARDED_MISS_CYCLES, 53),
PMC_E500_COMMON(STORE_TRANSLATE_WHEN_QUEUE_FULL_CYCLES, 54),
PMC_E500_COMMON(ADDRESS_COLLISION_CYCLES, 55),
PMC_E500_COMMON(DATA_MMU_MISS_CYCLES, 56),
PMC_E500_COMMON(DATA_MMU_BUSY_CYCLES, 57),
PMC_E500_COMMON(PART2_MISALIGNED_CACHE_ACCESS_CYCLES, 58),
PMC_E500_COMMON(INSTR_L1_CACHE_LOCKS, 59),
PMC_E500_COMMON(INSTR_L1_CACHE_RELOADS, 60),
PMC_E500_COMMON(INSTR_L1_CACHE_FETCHES, 61),
PMC_E500_COMMON(INSTR_MMU_TLB4K_RELOADS, 62),
PMC_E500_COMMON(INSTR_MMU_VSP_RELOADS, 63),
PMC_E500_COMMON(DATA_MMU_TLB4K_RELOADS, 64),
PMC_E500_COMMON(DATA_MMU_VSP_RELOADS, 65),
PMC_E500_COMMON(L2MMU_MISSES, 66),
PMC_E500_COMMON(BIU_MASTER_REQUESTS, 67),
PMC_E500_COMMON(BIU_MASTER_INSTR_SIDE_REQUESTS, 68),
PMC_E500_COMMON(BIU_MASTER_DATA_SIDE_REQUESTS, 69),
PMC_E500_COMMON(BIU_MASTER_DATA_SIDE_CASTOUT_REQUESTS, 70),
PMC_E500_COMMON(BIU_MASTER_RETRIES, 71),
PMC_E500_COMMON(SNOOP_REQUESTS, 72),
PMC_E500_COMMON(SNOOP_HITS, 73),
PMC_E500_COMMON(SNOOP_PUSHES, 74),
PMC_E500_COMMON(SNOOP_RETRIES, 75),
PMC_E500_EVENT(DLFB_LOAD_MISS_CYCLES, PMC_PPC_MASK0|PMC_PPC_MASK1,
76, PMC_PPC_E500_ANY),
PMC_E500_EVENT(ILFB_FETCH_MISS_CYCLES, PMC_PPC_MASK0|PMC_PPC_MASK1,
77, PMC_PPC_E500_ANY),
PMC_E500_EVENT(EXT_INPU_INTR_LATENCY_CYCLES, PMC_PPC_MASK0|PMC_PPC_MASK1,
78, PMC_PPC_E500_ANY),
PMC_E500_EVENT(CRIT_INPUT_INTR_LATENCY_CYCLES, PMC_PPC_MASK0|PMC_PPC_MASK1,
79, PMC_PPC_E500_ANY),
PMC_E500_EVENT(EXT_INPUT_INTR_PENDING_LATENCY_CYCLES,
PMC_PPC_MASK0|PMC_PPC_MASK1, 80, PMC_PPC_E500_ANY),
PMC_E500_EVENT(CRIT_INPUT_INTR_PENDING_LATENCY_CYCLES,
PMC_PPC_MASK0|PMC_PPC_MASK1, 81, PMC_PPC_E500_ANY),
PMC_E500_COMMON(PMC0_OVERFLOW, 82),
PMC_E500_COMMON(PMC1_OVERFLOW, 83),
PMC_E500_COMMON(PMC2_OVERFLOW, 84),
PMC_E500_COMMON(PMC3_OVERFLOW, 85),
PMC_E500_COMMON(INTERRUPTS_TAKEN, 86),
PMC_E500_COMMON(EXT_INPUT_INTR_TAKEN, 87),
PMC_E500_COMMON(CRIT_INPUT_INTR_TAKEN, 88),
PMC_E500_COMMON(SYSCALL_TRAP_INTR, 89),
PMC_E500_EVENT(TLB_BIT_TRANSITIONS, PMC_PPC_MASK_ALL, 90,
PMC_PPC_E500V2 | PMC_PPC_E500MC),
PMC_E500MC_ONLY(L2_LINEFILL_BUFFER, 91),
PMC_E500MC_ONLY(LV2_VS, 92),
PMC_E500MC_ONLY(CASTOUTS_RELEASED, 93),
PMC_E500MC_ONLY(INTV_ALLOCATIONS, 94),
PMC_E500MC_ONLY(DLFB_RETRIES_TO_MBAR, 95),
PMC_E500MC_ONLY(STORE_RETRIES, 96),
PMC_E500MC_ONLY(STASH_L1_HITS, 97),
PMC_E500MC_ONLY(STASH_L2_HITS, 98),
PMC_E500MC_ONLY(STASH_BUSY_1, 99),
PMC_E500MC_ONLY(STASH_BUSY_2, 100),
PMC_E500MC_ONLY(STASH_BUSY_3, 101),
PMC_E500MC_ONLY(STASH_HITS, 102),
PMC_E500MC_ONLY(STASH_HIT_DLFB, 103),
PMC_E500MC_ONLY(STASH_REQUESTS, 106),
PMC_E500MC_ONLY(STASH_REQUESTS_L1, 107),
PMC_E500MC_ONLY(STASH_REQUESTS_L2, 108),
PMC_E500MC_ONLY(STALLS_NO_CAQ_OR_COB, 109),
PMC_E500MC_ONLY(L2_CACHE_ACCESSES, 110),
PMC_E500MC_ONLY(L2_HIT_CACHE_ACCESSES, 111),
PMC_E500MC_ONLY(L2_CACHE_DATA_ACCESSES, 112),
PMC_E500MC_ONLY(L2_CACHE_DATA_HITS, 113),
PMC_E500MC_ONLY(L2_CACHE_INSTR_ACCESSES, 114),
PMC_E500MC_ONLY(L2_CACHE_INSTR_HITS, 115),
PMC_E500MC_ONLY(L2_CACHE_ALLOCATIONS, 116),
PMC_E500MC_ONLY(L2_CACHE_DATA_ALLOCATIONS, 117),
PMC_E500MC_ONLY(L2_CACHE_DIRTY_DATA_ALLOCATIONS, 118),
PMC_E500MC_ONLY(L2_CACHE_INSTR_ALLOCATIONS, 119),
PMC_E500MC_ONLY(L2_CACHE_UPDATES, 120),
PMC_E500MC_ONLY(L2_CACHE_CLEAN_UPDATES, 121),
PMC_E500MC_ONLY(L2_CACHE_DIRTY_UPDATES, 122),
PMC_E500MC_ONLY(L2_CACHE_CLEAN_REDUNDANT_UPDATES, 123),
PMC_E500MC_ONLY(L2_CACHE_DIRTY_REDUNDANT_UPDATES, 124),
PMC_E500MC_ONLY(L2_CACHE_LOCKS, 125),
PMC_E500MC_ONLY(L2_CACHE_CASTOUTS, 126),
PMC_E500MC_ONLY(L2_CACHE_DATA_DIRTY_HITS, 127),
PMC_E500MC_ONLY(INSTR_LFB_WENT_HIGH_PRIORITY, 128),
PMC_E500MC_ONLY(SNOOP_THROTTLING_TURNED_ON, 129),
PMC_E500MC_ONLY(L2_CLEAN_LINE_INVALIDATIONS, 130),
PMC_E500MC_ONLY(L2_INCOHERENT_LINE_INVALIDATIONS, 131),
PMC_E500MC_ONLY(L2_COHERENT_LINE_INVALIDATIONS, 132),
PMC_E500MC_ONLY(COHERENT_LOOKUP_MISS_DUE_TO_VALID_BUT_INCOHERENT_MATCHES, 133),
PMC_E500MC_ONLY(IAC1S_DETECTED, 140),
PMC_E500MC_ONLY(IAC2S_DETECTED, 141),
PMC_E500MC_ONLY(DAC1S_DTECTED, 144),
PMC_E500MC_ONLY(DAC2S_DTECTED, 145),
PMC_E500MC_ONLY(DVT0_DETECTED, 148),
PMC_E500MC_ONLY(DVT1_DETECTED, 149),
PMC_E500MC_ONLY(DVT2_DETECTED, 150),
PMC_E500MC_ONLY(DVT3_DETECTED, 151),
PMC_E500MC_ONLY(DVT4_DETECTED, 152),
PMC_E500MC_ONLY(DVT5_DETECTED, 153),
PMC_E500MC_ONLY(DVT6_DETECTED, 154),
PMC_E500MC_ONLY(DVT7_DETECTED, 155),
PMC_E500MC_ONLY(CYCLES_COMPLETION_STALLED_NEXUS_FIFO_FULL, 156),
PMC_E500MC_ONLY(FPU_DOUBLE_PUMP, 160),
PMC_E500MC_ONLY(FPU_FINISH, 161),
PMC_E500MC_ONLY(FPU_DIVIDE_CYCLES, 162),
PMC_E500MC_ONLY(FPU_DENORM_INPUT_CYCLES, 163),
PMC_E500MC_ONLY(FPU_RESULT_STALL_CYCLES, 164),
PMC_E500MC_ONLY(FPU_FPSCR_FULL_STALL, 165),
PMC_E500MC_ONLY(FPU_PIPE_SYNC_STALLS, 166),
PMC_E500MC_ONLY(FPU_INPUT_DATA_STALLS, 167),
PMC_E500MC_ONLY(DECORATED_LOADS, 176),
PMC_E500MC_ONLY(DECORATED_STORES, 177),
PMC_E500MC_ONLY(LOAD_RETRIES, 178),
PMC_E500MC_ONLY(STWCX_SUCCESSES, 179),
PMC_E500MC_ONLY(STWCX_FAILURES, 180),
};
static pmc_value_t
e500_pmcn_read(unsigned int pmc)
{
switch (pmc) {
case 0:
return mfpmr(PMR_PMC0);
break;
case 1:
return mfpmr(PMR_PMC1);
break;
case 2:
return mfpmr(PMR_PMC2);
break;
case 3:
return mfpmr(PMR_PMC3);
break;
default:
panic("Invalid PMC number: %d\n", pmc);
}
}
static void
e500_pmcn_write(unsigned int pmc, uint32_t val)
{
switch (pmc) {
case 0:
mtpmr(PMR_PMC0, val);
break;
case 1:
mtpmr(PMR_PMC1, val);
break;
case 2:
mtpmr(PMR_PMC2, val);
break;
case 3:
mtpmr(PMR_PMC3, val);
break;
default:
panic("Invalid PMC number: %d\n", pmc);
}
}
static int
e500_read_pmc(int cpu, int ri, pmc_value_t *v)
{
struct pmc *pm;
pmc_value_t tmp;
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[powerpc,%d] illegal CPU value %d", __LINE__, cpu));
KASSERT(ri >= 0 && ri < E500_MAX_PMCS,
("[powerpc,%d] illegal row index %d", __LINE__, ri));
pm = powerpc_pcpu[cpu]->pc_ppcpmcs[ri].phw_pmc;
KASSERT(pm,
("[core,%d] cpu %d ri %d pmc not configured", __LINE__, cpu,
ri));
tmp = e500_pmcn_read(ri);
PMCDBG2(MDP,REA,2,"ppc-read id=%d -> %jd", ri, tmp);
if (PMC_IS_SAMPLING_MODE(PMC_TO_MODE(pm)))
*v = POWERPC_PERFCTR_VALUE_TO_RELOAD_COUNT(tmp);
else
*v = tmp;
return 0;
}
static int
e500_write_pmc(int cpu, int ri, pmc_value_t v)
{
struct pmc *pm;
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[powerpc,%d] illegal CPU value %d", __LINE__, cpu));
KASSERT(ri >= 0 && ri < E500_MAX_PMCS,
("[powerpc,%d] illegal row-index %d", __LINE__, ri));
pm = powerpc_pcpu[cpu]->pc_ppcpmcs[ri].phw_pmc;
if (PMC_IS_SAMPLING_MODE(PMC_TO_MODE(pm)))
v = POWERPC_RELOAD_COUNT_TO_PERFCTR_VALUE(v);
PMCDBG3(MDP,WRI,1,"powerpc-write cpu=%d ri=%d v=%jx", cpu, ri, v);
e500_pmcn_write(ri, v);
return 0;
}
static int
e500_config_pmc(int cpu, int ri, struct pmc *pm)
{
struct pmc_hw *phw;
PMCDBG3(MDP,CFG,1, "cpu=%d ri=%d pm=%p", cpu, ri, pm);
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[powerpc,%d] illegal CPU value %d", __LINE__, cpu));
KASSERT(ri >= 0 && ri < E500_MAX_PMCS,
("[powerpc,%d] illegal row-index %d", __LINE__, ri));
phw = &powerpc_pcpu[cpu]->pc_ppcpmcs[ri];
KASSERT(pm == NULL || phw->phw_pmc == NULL,
("[powerpc,%d] pm=%p phw->pm=%p hwpmc not unconfigured",
__LINE__, pm, phw->phw_pmc));
phw->phw_pmc = pm;
return 0;
}
static int
e500_start_pmc(int cpu, int ri)
{
uint32_t config;
struct pmc *pm;
struct pmc_hw *phw;
phw = &powerpc_pcpu[cpu]->pc_ppcpmcs[ri];
pm = phw->phw_pmc;
config = pm->pm_md.pm_powerpc.pm_powerpc_evsel;
if (PMC_IS_SAMPLING_MODE(PMC_TO_MODE(pm)))
config |= PMLCax_CE;
/* Enable the PMC. */
switch (ri) {
case 0:
mtpmr(PMR_PMLCa0, config);
break;
case 1:
mtpmr(PMR_PMLCa1, config);
break;
case 2:
mtpmr(PMR_PMLCa2, config);
break;
case 3:
mtpmr(PMR_PMLCa3, config);
break;
default:
break;
}
return 0;
}
static int
e500_stop_pmc(int cpu, int ri)
{
struct pmc *pm;
struct pmc_hw *phw;
register_t pmc_pmlc;
phw = &powerpc_pcpu[cpu]->pc_ppcpmcs[ri];
pm = phw->phw_pmc;
/*
* Disable the PMCs.
*/
switch (ri) {
case 0:
pmc_pmlc = mfpmr(PMR_PMLCa0);
pmc_pmlc |= PMLCax_FC;
mtpmr(PMR_PMLCa0, pmc_pmlc);
break;
case 1:
pmc_pmlc = mfpmr(PMR_PMLCa1);
pmc_pmlc |= PMLCax_FC;
mtpmr(PMR_PMLCa1, pmc_pmlc);
break;
case 2:
pmc_pmlc = mfpmr(PMR_PMLCa2);
pmc_pmlc |= PMLCax_FC;
mtpmr(PMR_PMLCa2, pmc_pmlc);
break;
case 3:
pmc_pmlc = mfpmr(PMR_PMLCa3);
pmc_pmlc |= PMLCax_FC;
mtpmr(PMR_PMLCa3, pmc_pmlc);
break;
default:
break;
}
return 0;
}
static int
e500_pcpu_init(struct pmc_mdep *md, int cpu)
{
int first_ri, i;
struct pmc_cpu *pc;
struct powerpc_cpu *pac;
struct pmc_hw *phw;
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[powerpc,%d] wrong cpu number %d", __LINE__, cpu));
PMCDBG1(MDP,INI,1,"powerpc-init cpu=%d", cpu);
/* Freeze all counters. */
mtpmr(PMR_PMGC0, PMGC_FAC | PMGC_PMIE | PMGC_FCECE);
powerpc_pcpu[cpu] = pac = malloc(sizeof(struct powerpc_cpu), M_PMC,
M_WAITOK|M_ZERO);
pac->pc_ppcpmcs = malloc(sizeof(struct pmc_hw) * E500_MAX_PMCS,
M_PMC, M_WAITOK|M_ZERO);
pac->pc_class = PMC_CLASS_E500;
pc = pmc_pcpu[cpu];
first_ri = md->pmd_classdep[PMC_MDEP_CLASS_INDEX_POWERPC].pcd_ri;
KASSERT(pc != NULL, ("[powerpc,%d] NULL per-cpu pointer", __LINE__));
for (i = 0, phw = pac->pc_ppcpmcs; i < E500_MAX_PMCS; i++, phw++) {
phw->phw_state = PMC_PHW_FLAG_IS_ENABLED |
PMC_PHW_CPU_TO_STATE(cpu) | PMC_PHW_INDEX_TO_STATE(i);
phw->phw_pmc = NULL;
pc->pc_hwpmcs[i + first_ri] = phw;
/* Initialize the PMC to stopped */
e500_stop_pmc(cpu, i);
}
/* Unfreeze global register. */
mtpmr(PMR_PMGC0, PMGC_PMIE | PMGC_FCECE);
return 0;
}
static int
e500_pcpu_fini(struct pmc_mdep *md, int cpu)
{
uint32_t pmgc0 = mfpmr(PMR_PMGC0);
pmgc0 |= PMGC_FAC;
mtpmr(PMR_PMGC0, pmgc0);
mtmsr(mfmsr() & ~PSL_PMM);
free(powerpc_pcpu[cpu]->pc_ppcpmcs, M_PMC);
free(powerpc_pcpu[cpu], M_PMC);
return 0;
}
static int
e500_allocate_pmc(int cpu, int ri, struct pmc *pm,
const struct pmc_op_pmcallocate *a)
{
enum pmc_event pe;
uint32_t caps, config, counter;
struct e500_event_code_map *ev;
uint16_t vers;
uint8_t pe_cpu_mask;
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[powerpc,%d] illegal CPU value %d", __LINE__, cpu));
KASSERT(ri >= 0 && ri < E500_MAX_PMCS,
("[powerpc,%d] illegal row index %d", __LINE__, ri));
caps = a->pm_caps;
pe = a->pm_ev;
config = PMLCax_FCS | PMLCax_FCU |
PMLCax_FCM1 | PMLCax_FCM1;
if (pe < PMC_EV_E500_FIRST || pe > PMC_EV_E500_LAST)
return (EINVAL);
ev = &e500_event_codes[pe-PMC_EV_E500_FIRST];
if (ev->pe_code == 0)
return (EINVAL);
vers = mfpvr() >> 16;
switch (vers) {
case FSL_E500v1:
pe_cpu_mask = ev->pe_cpu & PMC_PPC_E500V1;
break;
case FSL_E500v2:
pe_cpu_mask = ev->pe_cpu & PMC_PPC_E500V2;
break;
case FSL_E500mc:
case FSL_E5500:
pe_cpu_mask = ev->pe_cpu & PMC_PPC_E500MC;
break;
}
if (pe_cpu_mask == 0)
return (EINVAL);
config |= PMLCax_EVENT(ev->pe_code);
counter = ev->pe_counter_mask;
if ((counter & (1 << ri)) == 0)
return (EINVAL);
if (caps & PMC_CAP_SYSTEM)
config &= ~PMLCax_FCS;
if (caps & PMC_CAP_USER)
config &= ~PMLCax_FCU;
if ((caps & (PMC_CAP_USER | PMC_CAP_SYSTEM)) == 0)
config &= ~(PMLCax_FCS|PMLCax_FCU);
pm->pm_md.pm_powerpc.pm_powerpc_evsel = config;
PMCDBG2(MDP,ALL,2,"powerpc-allocate ri=%d -> config=0x%x", ri, config);
return 0;
}
static int
e500_release_pmc(int cpu, int ri, struct pmc *pmc)
{
struct pmc_hw *phw;
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[powerpc,%d] illegal CPU value %d", __LINE__, cpu));
KASSERT(ri >= 0 && ri < E500_MAX_PMCS,
("[powerpc,%d] illegal row-index %d", __LINE__, ri));
phw = &powerpc_pcpu[cpu]->pc_ppcpmcs[ri];
KASSERT(phw->phw_pmc == NULL,
("[powerpc,%d] PHW pmc %p non-NULL", __LINE__, phw->phw_pmc));
return 0;
}
static int
e500_intr(int cpu, struct trapframe *tf)
{
int i, error, retval;
uint32_t config;
struct pmc *pm;
struct powerpc_cpu *pac;
KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
("[powerpc,%d] out of range CPU %d", __LINE__, cpu));
PMCDBG3(MDP,INT,1, "cpu=%d tf=%p um=%d", cpu, (void *) tf,
TRAPF_USERMODE(tf));
retval = 0;
pac = powerpc_pcpu[cpu];
config = mfpmr(PMR_PMGC0) & ~PMGC_FAC;
/*
* look for all PMCs that have interrupted:
* - look for a running, sampling PMC which has overflowed
* and which has a valid 'struct pmc' association
*
* If found, we call a helper to process the interrupt.
*/
for (i = 0; i < E500_MAX_PMCS; i++) {
if ((pm = pac->pc_ppcpmcs[i].phw_pmc) == NULL ||
!PMC_IS_SAMPLING_MODE(PMC_TO_MODE(pm))) {
continue;
}
if (!E500_PMC_HAS_OVERFLOWED(i))
continue;
retval = 1; /* Found an interrupting PMC. */
if (pm->pm_state != PMC_STATE_RUNNING)
continue;
/* Stop the counter if logging fails. */
error = pmc_process_interrupt(cpu, PMC_HR, pm, tf,
TRAPF_USERMODE(tf));
if (error != 0)
e500_stop_pmc(cpu, i);
/* reload count. */
e500_write_pmc(cpu, i, pm->pm_sc.pm_reloadcount);
}
if (retval)
counter_u64_add(pmc_stats.pm_intr_processed, 1);
else
counter_u64_add(pmc_stats.pm_intr_ignored, 1);
/* Re-enable PERF exceptions. */
if (retval)
mtpmr(PMR_PMGC0, config | PMGC_PMIE);
return (retval);
}
int
pmc_e500_initialize(struct pmc_mdep *pmc_mdep)
{
struct pmc_classdep *pcd;
pmc_mdep->pmd_cputype = PMC_CPU_PPC_E500;
pcd = &pmc_mdep->pmd_classdep[PMC_MDEP_CLASS_INDEX_POWERPC];
pcd->pcd_caps = POWERPC_PMC_CAPS;
pcd->pcd_class = PMC_CLASS_E500;
pcd->pcd_num = E500_MAX_PMCS;
pcd->pcd_ri = pmc_mdep->pmd_npmc;
pcd->pcd_width = 32;
pcd->pcd_allocate_pmc = e500_allocate_pmc;
pcd->pcd_config_pmc = e500_config_pmc;
pcd->pcd_pcpu_fini = e500_pcpu_fini;
pcd->pcd_pcpu_init = e500_pcpu_init;
pcd->pcd_describe = powerpc_describe;
pcd->pcd_get_config = powerpc_get_config;
pcd->pcd_read_pmc = e500_read_pmc;
pcd->pcd_release_pmc = e500_release_pmc;
pcd->pcd_start_pmc = e500_start_pmc;
pcd->pcd_stop_pmc = e500_stop_pmc;
pcd->pcd_write_pmc = e500_write_pmc;
pmc_mdep->pmd_npmc += E500_MAX_PMCS;
pmc_mdep->pmd_intr = e500_intr;
return (0);
}
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