【发布时间】：2017-11-01 22:35:01
【问题描述】：
这是$ipmitool -sensor 的输出，它们显示了所有 DIMM 信息。但是FreeIPMI只有被插件的DIMM信息。如何在 C 中使用 FreeIPMI API 获取所有内存 DIMM 信息？
$ sudo ipmitool sensor
CPU Temp | 59.000 | degrees C | ok | 0.000 | 0.000 | 0.000 | 99.000 | 104.000 | 104.000
System Temp | 35.000 | degrees C | ok | -10.000 | -5.000 | 0.000 | 80.000 | 85.000 | 90.000
Peripheral Temp | 49.000 | degrees C | ok | -10.000 | -5.000 | 0.000 | 80.000 | 85.000 | 90.000
DIMMA1 Temp | na | | na | na | na | na | na | na | na
DIMMA2 Temp | na | | na | na | na | na | na | na | na
DIMMB1 Temp | 36.000 | degrees C | ok | -5.000 | 0.000 | 5.000 | 80.000 | 85.000 | 90.000
DIMMB2 Temp | na | | na | na | na | na | na | na | na
FAN1 | 3800.000 | RPM | ok | 300.000 | 500.000 | 700.000 | 25300.000 | 25400.000 | 25500.000
FAN2 | 4100.000 | RPM | ok | 300.000 | 500.000 | 700.000 | 25300.000 | 25400.000 | 25500.000
FAN3 | 4100.000 | RPM | ok | 300.000 | 500.000 | 700.000 | 25300.000 | 25400.000 | 25500.000
FANA | 4400.000 | RPM | ok | 300.000 | 500.000 | 700.000 | 25300.000 | 25400.000 | 25500.000
12V | 12.000 | Volts | ok | 10.173 | 10.299 | 10.740 | 12.945 | 13.260 | 13.386
5VCC | 4.922 | Volts | ok | 4.246 | 4.298 | 4.480 | 5.390 | 5.546 | 5.598
3.3VCC | 3.248 | Volts | ok | 2.789 | 2.823 | 2.959 | 3.554 | 3.656 | 3.690
VBAT | 3.047 | Volts | ok | 2.375 | 2.487 | 2.599 | 3.775 | 3.887 | 3.999
Vcpu | 1.809 | Volts | ok | 1.242 | 1.260 | 1.395 | 1.899 | 2.088 | 2.106
VDIMMAB | 1.191 | Volts | ok | 0.948 | 0.975 | 1.047 | 1.344 | 1.425 | 1.443
VDIMMCD | 1.209 | Volts | ok | 0.948 | 0.975 | 1.047 | 1.344 | 1.425 | 1.443
5VSB | 4.974 | Volts | ok | 4.246 | 4.298 | 4.480 | 5.390 | 5.546 | 5.598
3.3VSB | 3.197 | Volts | ok | 2.789 | 2.823 | 2.959 | 3.554 | 3.656 | 3.690
1.5V PCH | 1.509 | Volts | ok | 1.320 | 1.347 | 1.401 | 1.644 | 1.671 | 1.698
1.2V BMC | 1.218 | Volts | ok | 1.020 | 1.047 | 1.092 | 1.344 | 1.371 | 1.398
1.05V PCH | 1.041 | Volts | ok | 0.870 | 0.897 | 0.942 | 1.194 | 1.221 | 1.248
Chassis Intru | 0x0 | discrete | 0x0000| na | na | na | na | na | na
关于内存信息，我知道DIMMA1、A2和B2没有被插件，DIMMB1的温度是36.0度。
这是来自 FreeIPMI 的ipmimonitoring-sensors 的输出：
Record ID, Sensor Name, Sensor Number, Sensor Type, Sensor State, Sensor Reading, Sensor Units, Sensor Event/Reading Type Code, Sensor Event Bitmask, Sensor Event String
4, Processor 1 CPU Temp, 1, Temperature, Nominal, 60.00, C, 1h, C0h, 'OK'
71, System Board 1 System Temp, 11, Temperature, Nominal, 36.00, C, 1h, C0h, 'OK'
138, System Board 2 Peripheral Temp, 14, Temperature, Nominal, 50.00, C, 1h, C0h, 'OK'
339, Memory Device 68 DIMMB1 Temp, 180, Temperature, Nominal, 37.00, C, 1h, C0h, 'OK'
473, Fan 1 FAN1, 65, Fan, Nominal, 3800.00, RPM, 1h, C0h, 'OK'
540, Fan 2 FAN2, 66, Fan, Nominal, 4100.00, RPM, 1h, C0h, 'OK'
607, Fan 3 FAN3, 67, Fan, Nominal, 4000.00, RPM, 1h, C0h, 'OK'
674, Fan 5 FANA, 69, Fan, Nominal, 4300.00, RPM, 1h, C0h, 'OK'
741, System Board 17 12V, 48, Voltage, Nominal, 12.00, V, 1h, C0h, 'OK'
808, System Board 33 5VCC, 49, Voltage, Nominal, 4.92, V, 1h, C0h, 'OK'
875, System Board 32 3.3VCC, 50, Voltage, Nominal, 3.25, V, 1h, C0h, 'OK'
942, System Board 18 VBAT, 51, Voltage, Nominal, 3.05, V, 1h, C0h, 'OK'
1009, Processor 2 Vcpu, 52, Voltage, Nominal, 1.81, V, 1h, C0h, 'OK'
1076, Memory Device 1 VDIMMAB, 53, Voltage, Nominal, 1.19, V, 1h, C0h, 'OK'
1143, Memory Device 2 VDIMMCD, 55, Voltage, Nominal, 1.21, V, 1h, C0h, 'OK'
1210, System Board 15 5VSB, 56, Voltage, Nominal, 4.97, V, 1h, C0h, 'OK'
1277, System Board 16 3.3VSB, 57, Voltage, Nominal, 3.20, V, 1h, C0h, 'OK'
1344, System Board 19 1.5V PCH, 60, Voltage, Nominal, 1.51, V, 1h, C0h, 'OK'
1411, System Board 20 1.2V BMC, 61, Voltage, Nominal, 1.22, V, 1h, C0h, 'OK'
1478, System Board 21 1.05V PCH, 62, Voltage, Nominal, 1.04, V, 1h, C0h, 'OK'
1545, System Chassis Chassis Intru, 170, Physical Security, Nominal, N/A, N/A, 6Fh, 0h, 'OK'
但没有关于 DIMMA1、A2 和 B2 的信息，因为它们不是插件。所以我追踪 impi-monitoring-sensor.c 的代码
if ((sensor_count = ipmi_monitoring_sensor_readings_by_record_id (ctx,
hostname,
ipmi_config,
sensor_reading_flags,
NULL, /* record_ids */
0, /* record_ids_length */
NULL,
NULL)) < 0)
和配置
static void
_init_ipmi_config (struct ipmi_monitoring_ipmi_config *ipmi_config)
{
assert (ipmi_config);
ipmi_config->driver_type = driver_type;
ipmi_config->disable_auto_probe = disable_auto_probe;
ipmi_config->driver_address = driver_address;
ipmi_config->register_spacing = register_spacing;
ipmi_config->driver_device = driver_device;
ipmi_config->protocol_version = protocol_version;
ipmi_config->username = username;
ipmi_config->password = password;
ipmi_config->k_g = k_g;
ipmi_config->k_g_len = k_g_len;
ipmi_config->privilege_level = privilege_level;
ipmi_config->authentication_type = authentication_type;
ipmi_config->cipher_suite_id = cipher_suite_id;
ipmi_config->session_timeout_len = session_timeout;
ipmi_config->retransmission_timeout_len = retransmission_timeout;
ipmi_config->workaround_flags = workaround_flags;
}
我可以假设主板有 4 个 DIMM 插槽，如果在 FreeIPMI 传感器输出中没有找到它们，我可以猜测它们不是插件。但是如何通过 IPMI 命令知道主板上的所有 DIMM 插槽呢？
【问题讨论】：
-
什么是主板？ IPMI 在哪里实施？我看到消费级 DIMM 模块上没有标准温度传感器，只有内存和小型 SPD EEPROM 芯片用于型号和时序，如何获得内存温度？如果“DIMM 温度”不是来自 DIMM 模块，或者只有部分模块有温度传感器怎么办？不应使用温度来检测 DIMM 插槽中的模块。可能，IPMI 不适用于 DIMM 检测（而 DMI 是 - 在目标 linux 上使用 dmidecode 命令和 ssh）。
-
据我了解，有 IPMI sdr 命令读取的 SDR 记录，会得到一个链表，一个一个，包含每个记录的值和名称。
Manufacturer: Supermicro Product Name: X10SDV-8C-TLN4F+来自sudo dmidecode -t 2。 -
dmidecode对您的调光器、数量和名称（型号）有何评价？ -
Number Of Devices is 4, DDR4, Manufacturer: Undefined通过命令$sudo dmidecode --type memory -
是否有 4 个 DDR4 具有任何非零字段，如“安装大小”？