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acrn-config: dump CPU info from /sys/devices/system/cpu/possible

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/proc/cpuinfo represents online CPUs only, and the number of CPUs is
limited by the 'maxcpus' option.

/sys/devices/system/cpu/possible is a better option for our purpose
since it represents the possible CPUs that can ever be available in the
system, including the offline CPUs. And it's not limited by 'maxcpus'.

Though the Linux command line parameter nr_cpus and possible_cpus still
have impact on /sys/devices/system/cpu/possible.

Tracked-On: #3854
Signed-off-by: Zide Chen <zide.chen@intel.com>
Acked-by: Victor Sun <victor.sun@intel.com>
This commit is contained in:
Zide Chen 2019-12-20 14:51:19 -08:00 committed by wenlingz
parent 5d1a08fc88
commit 5f2c303a7e
1 changed files with 9 additions and 22 deletions
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29
misc/acrn-config/target/misc.py
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@ -9,7 +9,7 @@ import subprocess
MEM_PATH = ['/proc/iomem', '/proc/meminfo']
TTY_PATH = '/sys/class/tty/'
SYS_IRQ_PATH = '/proc/interrupts'
CPU_INFO_PATH = '/proc/cpuinfo'
CPU_INFO_PATH = '/sys/devices/system/cpu/possible'
ttys_type = {
'0': 'PORT',
@ -194,31 +194,18 @@ def dump_total_mem(config):
def dump_cpu_core_info(config):
print("\t<CPU_PROCESSOR_INFO>", file=config)
processor_id_list = []
with open(CPU_INFO_PATH, 'rt') as cpu_info:
while True:
line = cpu_info.readline()
if not line:
break
processor_id = int(line.split('-')[0].strip())
print("\t{}".format(processor_id), end="", file=config)
if ':' in line and line.split(':')[0].strip() == "processor":
processor_id = line.split(':')[1].strip()
processor_id_list.append(processor_id)
processor_len = len(processor_id_list)
for processor_id in processor_id_list:
if int(processor_id) == 0:
if processor_len == 1:
print("\t{},".format(processor_id.strip()), file=config)
else:
print("\t{},".format(processor_id.strip()), end="", file=config)
else:
if processor_len == int(processor_id) + 1:
print(" {}".format(processor_id.strip()), file=config)
else:
print(" {},".format(processor_id.strip()), end="", file=config)
processor_id += 1
while (processor_id < int(line.split('-')[1].strip())):
print(", {}".format(processor_id), end="", file=config)
processor_id += 1
print("", file=config)
print("\t</CPU_PROCESSOR_INFO>", file=config)
print("", file=config)