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a8d7d1101a
* cpu: Support processor-less (memory-only) NUMA nodes
Processor-less (memory-only) NUMA nodes exist e.g. in systems that use
Intel Optane drives for RAM expansion using Intel Memory Drive
Technology (IMDT).
IMDT RAM expansion supports two modes:
* "Unify Remote Memory domains": present a processor-less (memory-only)
NUMA domain, which is the default
* "Expand local memory domains": to expand each processor’s memory domain
with a portion of the memory made available by Optane and IMDT
This commit fixes a crash in the first case (when "cpulist" is empty).
Here's an example of such a system:
$ numastat -m|head -n5
Per-node system memory usage (in MBs):
Node 0 Node 1 Node 2 Total
--------------- --------------- --------------- ---------------
MemTotal 118239.56 130816.00 464384.00 713439.56
$ for i in {0..2}; do echo -n "$i: " ; cat /sys/bus/node/devices/node$i/cpulist ; done
0: 0-7,16-23
1: 8-15,24-31
2:
$ /opt/vsmp/bin/vsmpversion -vvv
Memory Drive Technology: 8.2.1455.74 (Sep 28 2017 13:09:59)
System configuration:
Boards: 3
1 x Proc. + I/O + Memory
2 x NVM devices (Intel SSDPED1K375GAQ)
Processors: 2, Cores: 16, Threads: 32
Intel(R) Xeon(R) CPU E5-2667 v4 @ 3.20GHz Stepping 01
Memory (MB): 713472 (of 977450), Cache: 251416, Private: 12562
1 x 249088MB [262036/ 678/12270]
1 x 232192MB [357707/125369/ 146] 82:00.0#1
1 x 232192MB [357707/125369/ 146] 83:00.0#1
* cpu: rename some variables (pkg => node)
* cpu: Use %v not %q in log.Debugf() format strings
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|---|---|---|
| .. | ||
| proc | ||
| qdisc | ||
| textfile | ||
| wifi | ||
| e2e-output.txt | ||
| ip_vs_result.txt | ||
| megacli | ||
| megacli_adapter.txt | ||
| megacli_disks.txt | ||
| sys.ttar | ||