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pcu: refactor into a device

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This commit is contained in:
Robert Jördens 2017-02-19 19:31:28 +01:00
parent b05d1bb7e3
commit e323e37829
1 changed files with 40 additions and 35 deletions
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75
artiq/coredevice/pcu.py
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@ -31,42 +31,47 @@ def _PCMR(n):
return _SPRGROUP_PC + 8 + n
@kernel
def pc_start():
"""
Configure and clear the kernel CPU performance counters.
class CorePCU:
"""Core device performance counter unit (PCU) access"""
def __init__(self, dmgr, core_device="core"):
self.core = dmgr.get(core_device)
The eight counters are configures to count the folloging events:
* Load or store
* Instruction fetch
* Data cache miss
* Instruction cache miss
* Instruction fetch stall
* Load-store-unit stall
* Branch stall
* Data dependency stall
"""
for i in range(8):
if not mfspr(_PCMR(i)) & _SPR_PCMR_CP:
raise ValueError("counter not present")
mtspr(_PCMR(i), 0)
mtspr(_PCCR(i), 0)
mtspr(_PCMR(0), _SPR_PCMR_CISM | _SPR_PCMR_LA | _SPR_PCMR_SA)
mtspr(_PCMR(1), _SPR_PCMR_CISM | _SPR_PCMR_IF)
mtspr(_PCMR(2), _SPR_PCMR_CISM | _SPR_PCMR_DCM)
mtspr(_PCMR(3), _SPR_PCMR_CISM | _SPR_PCMR_ICM)
mtspr(_PCMR(4), _SPR_PCMR_CISM | _SPR_PCMR_IFS)
mtspr(_PCMR(5), _SPR_PCMR_CISM | _SPR_PCMR_LSUS)
mtspr(_PCMR(6), _SPR_PCMR_CISM | _SPR_PCMR_BS)
mtspr(_PCMR(7), _SPR_PCMR_CISM | _SPR_PCMR_DDS)
@kernel
def start(self):
"""
Configure and clear the kernel CPU performance counters.
The eight counters are configures to count the folloging events:
* Load or store
* Instruction fetch
* Data cache miss
* Instruction cache miss
* Instruction fetch stall
* Load-store-unit stall
* Branch stall
* Data dependency stall
"""
for i in range(8):
if not mfspr(_PCMR(i)) & _SPR_PCMR_CP:
raise ValueError("counter not present")
mtspr(_PCMR(i), 0)
mtspr(_PCCR(i), 0)
mtspr(_PCMR(0), _SPR_PCMR_CISM | _SPR_PCMR_LA | _SPR_PCMR_SA)
mtspr(_PCMR(1), _SPR_PCMR_CISM | _SPR_PCMR_IF)
mtspr(_PCMR(2), _SPR_PCMR_CISM | _SPR_PCMR_DCM)
mtspr(_PCMR(3), _SPR_PCMR_CISM | _SPR_PCMR_ICM)
mtspr(_PCMR(4), _SPR_PCMR_CISM | _SPR_PCMR_IFS)
mtspr(_PCMR(5), _SPR_PCMR_CISM | _SPR_PCMR_LSUS)
mtspr(_PCMR(6), _SPR_PCMR_CISM | _SPR_PCMR_BS)
mtspr(_PCMR(7), _SPR_PCMR_CISM | _SPR_PCMR_DDS)
@kernel
def pc_get(r):
"""
Read the performance counters and store the counts in the array provided.
@kernel
def get(self, r):
"""
Read the performance counters and store the counts in the
array provided.
:param list[int] r: array to store the counter values
"""
for i in range(8):
r[i] = mfspr(_PCCR(i))
:param list[int] r: array to store the counter values
"""
for i in range(8):
r[i] = mfspr(_PCCR(i))