remove depreciated pmu contention detection

src/perf_helpers.py

@@ -161,82 +161,6 @@ def enumerate_uncore(event, n):
     return event_list
 
 
-# read the MSR register and return the value in dec format
-def readmsr(msr, cpu=0):
-    f = os.open("/dev/cpu/%d/msr" % (cpu,), os.O_RDONLY)
-    os.lseek(f, msr, os.SEEK_SET)
-    val = struct.unpack("Q", os.read(f, 8))[0]
-    os.close(f)
-    return val
-
-
-# parse hex to int
-def parse_hex(s):
-    try:
-        return int(s, 16)
-    except ValueError:
-        raise argparse.ArgumentError("Bad hex number %s" % (s))
-
-
-# detect if PMU counters are in use
-def pmu_contention_detect(iterations=6):
-    interval = 10
-    msrregs = [
-        "0x309",
-        "0x30a",
-        "0x30b",
-        "0x30c",
-        "0xc1",
-        "0xc2",
-        "0xc3",
-        "0xc4",
-        "0xc5",
-        "0xc6",
-        "0xc7",
-        "0xc8",
-    ]
-    values = [0] * len(msrregs)
-    prev_values = [0] * len(msrregs)
-
-    for count in range(iterations):
-        for i, reg in enumerate(msrregs):
-            msrreg = parse_hex(reg)
-            values[i] = readmsr(msrreg)
-
-            in_use = 0
-        if count > 0:
-            for j, val in enumerate(values):
-                if val != prev_values[j]:
-                    in_use = 1
-                    if msrregs[j] == "0x309":
-                        print("PMU in use, hint: instructions")
-                    if msrregs[j] == "0x30a":
-                        print(
-                            "PMU in use, hint: cpu-cycles or Check NMI watchdog. Try: echo 0 > /proc/sys/kernel/nmi_watchdog as sudo"
-                        )
-                    if msrregs[j] == "0x30b":
-                        print("PMU in use, hint: ref-cycles")
-                    if (
-                        msrregs[j] == "0xc1"
-                        or msrregs[j] == "0xc2"
-                        or msrregs[j] == "0xc3"
-                        or msrregs[j] == "0xc4"
-                    ):
-                        print("Some PMUs in use")
-        if in_use != 0:
-            print("FAIL: PMUs in use")
-            return True
-
-        print(
-            "checking iteration= %d waiting for %d seconds " % ((count + 1), interval)
-        )
-        time.sleep(interval)
-        prev_values = values[:]
-
-    print("PASS: PMUs not in use")
-    return False
-
-
 # get linux kernel version
 def get_version():
     version = ""