A simple setup for SSH connection multiplexing using ControlMaster, plus a watchdog script that checks the master connection and restarts it when needed.
Useful when you frequently create short-lived SSH sessions but want them to reuse one long-lived underlying SSH connection.
Add to:
| /* Copyright (c) 2026 Nenad Mićić <nenad@micic.be> https://be.linkedin.com/in/nenadmicic | |
| * SPDX-License-Identifier: Apache-2.0 | |
| * | |
| * microgpt.c — Minimal GPT training and inference in 655 lines of pure C. | |
| * Hand-written forward and backward pass, two-phase gradient accumulation. | |
| * Trains a 1-layer, 4-head, 4192-parameter character-level transformer. | |
| * | |
| * Inspired by Andrej Karpathy's microgpt.py (200 lines of Python): | |
| * https://gist.github.com/karpathy/8627fe009c40f57531cb18360106ce95 | |
| * |
| date;cli show card table | grep "Service Function" | tr -d : | awk '{print exec="ssh card"$1"-cpu0 /usr/bin64/iftask_dump_stats -d ";print(exec);system(exec);print "===END==="}' | grep -vE '\s+0\s+0\s+0\s+0' |
| #!/usr/bin/awk -f | |
| #Use: chmod +x ./extract_egtpc_peers.awk; | |
| # cat SSD.txt | ./extract_egtpc_peers.awk | |
| # Example to use on multiple SSD's: | |
| # cat SSD1.txt | ./extract_egtpc_peers.awk > peers1.txt | |
| # cat SSD2.txt | ./extract_egtpc_peers.awk > peers2.txt | |
| # cat SSD3.txt | ./extract_egtpc_peers.awk > peers3.txt | |
| # then agregate outputs into one: | |
| # cat peers*.txt | sort | uniq > all.txt | |
| # -> if SSD1,2,3 are from different nodes, then all.txt will have agregated view from all. |
First execute
| #!/bin/sh | |
| # To run: | |
| # | |
| # chmod +x crypto_chip_detect.sh; | |
| # ./crypto_chip_detect.sh support_summary | |
| # | |
| # In short script check Alloc-Free for crypto counters which will be very low for working cards - usually less then 100 or more around 10. | |
| # Note threshold is set to 3000, in some corener cases during very high load may go to this value, but will go back in second back to low value. | |
| # BUT, if you see 4 lines: Issue deteceted delta for same card then it is 100% crypto chip issue. | |
| # This threshold is assumed as we are little bit bellow 4K buffers. In 21.28.mX buffers are increased to 4k. In older version this could be close to 1K. |
| #!/bin/bash | |
| ### Ver 5.0 # 14th Dec 2023 | |
| ###Contact: [email protected] | |
| ### | |
| ### NOTE: Please copy/paste script from begin #!/bin/bash to the ###END | |
| ### NOTE: Please copy/paste script from begin #!/bin/bash to the ###END | |
| ### NOTE: Please copy/paste script from begin #!/bin/bash to the ###END | |
| read -r -d '' HELP_README << README_BEGIN_END | |
| # get to debug shell after cli test-commands password ... | |
| To run: |
| #!/bin/bash | |
| echo "Impacted card is one where you see the line: ERROR: Qat is not responding. Please restart the device" | |
| ping bcast -c 2 -w 0.2 -b >& /dev/null | |
| IpNeighShowReach=( $( ip neigh show | grep 172.16 | grep REACHABLE | awk '{print $1}' | sort -n )) | |
| i=0;for IP in "${IpNeighShowReach[@]}";do i=$(( $i + 1 )); IPX[$i]=$IP;done;iLAST=$i; | |
| for ((i=1;i<=$iLAST;i++)); do | |
| IP=${IPX[$i]}; | |
| echo === $IP === | |
| grep $IP" " /etc/hosts | |
| ssh $IP 'grep -e "ERROR" -e "Qat is not responding" -e "Please restart the device" /proc/icp*/qat* /proc/icp*/heartbeat*' |
| #NOTE: This just generate output. You have to paste back this into CLI and configure it! | |
| cli test-commands password ..... | |
| debug shell | |
| cli show task table facility sessmgr all | grep sessmgr | awk 'BEGIN{print "configure"} {if ($3<5000){print "no logging enable-debug facility sessmgr instance "$3 }} END{print "exit"}' | |
| exit | |
| #NOTE: This just generate output. You have to paste back this into CLI and configure it! |