In addition to displaying kvm_exit as an aggregate counter, use perf_event's
filter capability to count individual exit reasons.
Signed-off-by: Avi Kivity <avi@xxxxxxxxxx>
---
kvm/kvm_stat | 156 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 155 insertions(+), 1 deletions(-)
diff --git a/kvm/kvm_stat b/kvm/kvm_stat
index 9b0392b..677683a 100755
--- a/kvm/kvm_stat
+++ b/kvm/kvm_stat
@@ -16,6 +16,143 @@ class DebugfsProvider(object):
return int(file(self.base + '/' + key).read())
return dict([(key, val(key)) for key in self._fields])
+vmx_exit_reasons = {
+ 0: 'EXCEPTION_NMI',
+ 1: 'EXTERNAL_INTERRUPT',
+ 2: 'TRIPLE_FAULT',
+ 7: 'PENDING_INTERRUPT',
+ 8: 'NMI_WINDOW',
+ 9: 'TASK_SWITCH',
+ 10: 'CPUID',
+ 12: 'HLT',
+ 14: 'INVLPG',
+ 15: 'RDPMC',
+ 16: 'RDTSC',
+ 18: 'VMCALL',
+ 19: 'VMCLEAR',
+ 20: 'VMLAUNCH',
+ 21: 'VMPTRLD',
+ 22: 'VMPTRST',
+ 23: 'VMREAD',
+ 24: 'VMRESUME',
+ 25: 'VMWRITE',
+ 26: 'VMOFF',
+ 27: 'VMON',
+ 28: 'CR_ACCESS',
+ 29: 'DR_ACCESS',
+ 30: 'IO_INSTRUCTION',
+ 31: 'MSR_READ',
+ 32: 'MSR_WRITE',
+ 33: 'INVALID_STATE',
+ 36: 'MWAIT_INSTRUCTION',
+ 39: 'MONITOR_INSTRUCTION',
+ 40: 'PAUSE_INSTRUCTION',
+ 41: 'MCE_DURING_VMENTRY',
+ 43: 'TPR_BELOW_THRESHOLD',
+ 44: 'APIC_ACCESS',
+ 48: 'EPT_VIOLATION',
+ 49: 'EPT_MISCONFIG',
+ 54: 'WBINVD',
+ 55: 'XSETBV',
+}
+
+svm_exit_reasons = {
+ 0x000: 'READ_CR0',
+ 0x003: 'READ_CR3',
+ 0x004: 'READ_CR4',
+ 0x008: 'READ_CR8',
+ 0x010: 'WRITE_CR0',
+ 0x013: 'WRITE_CR3',
+ 0x014: 'WRITE_CR4',
+ 0x018: 'WRITE_CR8',
+ 0x020: 'READ_DR0',
+ 0x021: 'READ_DR1',
+ 0x022: 'READ_DR2',
+ 0x023: 'READ_DR3',
+ 0x024: 'READ_DR4',
+ 0x025: 'READ_DR5',
+ 0x026: 'READ_DR6',
+ 0x027: 'READ_DR7',
+ 0x030: 'WRITE_DR0',
+ 0x031: 'WRITE_DR1',
+ 0x032: 'WRITE_DR2',
+ 0x033: 'WRITE_DR3',
+ 0x034: 'WRITE_DR4',
+ 0x035: 'WRITE_DR5',
+ 0x036: 'WRITE_DR6',
+ 0x037: 'WRITE_DR7',
+ 0x040: 'EXCP_BASE',
+ 0x060: 'INTR',
+ 0x061: 'NMI',
+ 0x062: 'SMI',
+ 0x063: 'INIT',
+ 0x064: 'VINTR',
+ 0x065: 'CR0_SEL_WRITE',
+ 0x066: 'IDTR_READ',
+ 0x067: 'GDTR_READ',
+ 0x068: 'LDTR_READ',
+ 0x069: 'TR_READ',
+ 0x06a: 'IDTR_WRITE',
+ 0x06b: 'GDTR_WRITE',
+ 0x06c: 'LDTR_WRITE',
+ 0x06d: 'TR_WRITE',
+ 0x06e: 'RDTSC',
+ 0x06f: 'RDPMC',
+ 0x070: 'PUSHF',
+ 0x071: 'POPF',
+ 0x072: 'CPUID',
+ 0x073: 'RSM',
+ 0x074: 'IRET',
+ 0x075: 'SWINT',
+ 0x076: 'INVD',
+ 0x077: 'PAUSE',
+ 0x078: 'HLT',
+ 0x079: 'INVLPG',
+ 0x07a: 'INVLPGA',
+ 0x07b: 'IOIO',
+ 0x07c: 'MSR',
+ 0x07d: 'TASK_SWITCH',
+ 0x07e: 'FERR_FREEZE',
+ 0x07f: 'SHUTDOWN',
+ 0x080: 'VMRUN',
+ 0x081: 'VMMCALL',
+ 0x082: 'VMLOAD',
+ 0x083: 'VMSAVE',
+ 0x084: 'STGI',
+ 0x085: 'CLGI',
+ 0x086: 'SKINIT',
+ 0x087: 'RDTSCP',
+ 0x088: 'ICEBP',
+ 0x089: 'WBINVD',
+ 0x08a: 'MONITOR',
+ 0x08b: 'MWAIT',
+ 0x08c: 'MWAIT_COND',
+ 0x400: 'NPF',
+}
+
+vendor_exit_reasons = {
+ 'vmx': vmx_exit_reasons,
+ 'svm': svm_exit_reasons,
+}
+
+exit_reasons = None
+
+for line in file('/proc/cpuinfo').readlines():
+ if line.startswith('flags'):
+ for flag in line.split():
+ if flag in vendor_exit_reasons:
+ exit_reasons = vendor_exit_reasons[flag]
+
+filters = {
+ 'kvm_exit': ('exit_reason', exit_reasons)
+}
+
+def invert(d):
+ return dict((x[1], x[0]) for x in d.iteritems())
+
+for f in filters:
+ filters[f] = (filters[f][0], invert(filters[f][1]))
+
import ctypes, struct, array
libc = ctypes.CDLL('libc.so.6')
@@ -62,6 +199,7 @@ PERF_FORMAT_TOTAL_TIME_RUNNING = 1 << 1
PERF_FORMAT_ID = 1 << 2
PERF_FORMAT_GROUP = 1 << 3
+import re
class TracepointProvider(object):
def __init__(self):
@@ -69,6 +207,13 @@ class TracepointProvider(object):
fields = [f
for f in os.listdir(self.base)
if os.path.isdir(self.base + '/' + f)]
+ extra = []
+ for f in fields:
+ if f in filters:
+ subfield, values = filters[f]
+ for name, number in values.iteritems():
+ extra.append(f + '(' + name + ')')
+ fields += extra
self.select(fields)
def fields(self):
return self._fields
@@ -80,10 +225,14 @@ class TracepointProvider(object):
for cpu in self.cpus:
group_leader = -1
for f in _fields:
+ fbase, sub = f, None
+ m = re.match(r'(.*)\((.*)\)', f)
+ if m:
+ fbase, sub = m.groups()
attr = perf_event_attr()
attr.type = PERF_TYPE_TRACEPOINT
attr.size = ctypes.sizeof(attr)
- id = int(file(self.base + f + '/id').read())
+ id = int(file(self.base + fbase + '/id').read())
attr.config = id
attr.sample_type = (PERF_SAMPLE_RAW
| PERF_SAMPLE_TIME
@@ -93,6 +242,11 @@ class TracepointProvider(object):
fd = _perf_event_open(attr, -1, cpu, group_leader, 0)
if fd == -1:
raise Exception('perf_event_open failed')
+ if sub:
+ import fcntl
+ filter = '%s==%d\0' % (filters[fbase][0],
+ filters[fbase][1][sub])
+ fcntl.ioctl(fd, 0x40082406, filter)
if group_leader == -1:
group_leader = fd
fds.append(fd)
--
1.7.1
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