added correct commands and removed duplicate stress functions

.gitignore

@@ -1,3 +1,2 @@
-Maximum_limit_stress_test/count_file.txt
 creation_time_experiment/creation_time_results.txt
 thread_recursive_scaling/runs/

Maximum_limit_stress_test/stress.c

@@ -1,78 +0,0 @@
-#include <stdio.h>
-#include <unistd.h>
-#include <sys/wait.h>
-#include <fcntl.h>
-#include <string.h>
-
-#define DEFAULT_NUM_LEN 512
-
-char *itoa(long num, char *strnum, size_t size){
-  int isNegative = 0;
-
-  
-  if(num == 0){
-    strnum[0] = '0';
-    strnum[1] = '\0';
-    return strnum;
-  }
-  
-  if(num < 0){
-    isNegative = 1;
-    num = -num;
-  }
-  
-  int counter = 0;
-  while(num > 0 && counter <(int)(size-1)){
-      strnum[counter] = num % 10 + '0';
-      num /= 10;
-      counter ++;
-  }
-  
-  if(isNegative){
-    strnum[counter] = '-';
-    counter++;
-  } 
-  
-  strnum[counter] = '\0';
-  
-  for(int i=0; i<counter/2; i++){
-    char temp = strnum[i];
-    strnum[i] = strnum[counter-1-i];
-    strnum[counter-1-i] = temp; 
-  }
-
-  return strnum;
-}
-
-int main(){
-  int fd = open("count_file.txt",O_CREAT | O_WRONLY | O_TRUNC,0600);
-  long count = 0; 
-  char intstr[DEFAULT_NUM_LEN];
-  while(1){
-    pid_t pid = fork();
-    
-    if(pid < 0){
-      perror("fork");
-      break;
-    }
-
-    if(pid == 0){
-      sleep(100);
-      return 0;
-    }
-
-    count++;
-    lseek(fd,0,SEEK_SET);
-    memset(intstr,0,sizeof(intstr));
-    itoa(count,intstr,DEFAULT_NUM_LEN);
-    write(fd,intstr,strlen(intstr));
-  }
-  
-  close(fd);
-  printf("Max forks: %ld\n",count);
-
-  while(wait(NULL) > 0);
-  
-
-  return 0;
-}

README.md

@@ -19,16 +19,42 @@ bash creation_time_experiment/bash_test_iter.sh
 bash thread_recursive_scaling/run_thread_recursive.sh
 ```
 
-Enable the dangerous stress tests (timeboxed):
+Enable the dangerous stress test (timeboxed):
 
 ```sh
-ALLOW_DANGEROUS=1 FORK_BOMB_SECONDS=5 MAX_LIMIT_SECONDS=5 bash run_all_experiments.sh
+ALLOW_DANGEROUS=1 FORK_BOMB_SECONDS=5 bash run_all_experiments.sh
+```
+
+## Key Commands for lifting linux kernel restrictions on alpine linux for threads & processes:
+
+```
+# Lift shell nproc limit
+ulimit -u unlimited
+
+# Raise kernel PID/thread caps (temporary until reboot)
+sysctl -w kernel.pid_max=131072
+sysctl -w kernel.threads-max=131072
+
+
+# cgroup v2 setup (Alpine Linux)
+mkdir -p /sys/fs/cgroup/test
+echo max > /sys/fs/cgroup/test/pids.max
+echo $$ > /sys/fs/cgroup/test/cgroup.procs
+```
+
+
+
+## Clean-up commands run after tests:
+```
+# Cleanup to make it non-persistent (move out, then delete)
+echo $$ > /sys/fs/cgroup/cgroup.procs
+rmdir /sys/fs/cgroup/test
 ```
 
 ## Potential dangers
 
-- The fork bomb and max-limit stress tests can freeze your machine or make it
+- The fork bomb can freeze your machine or make it unresponsive by exhausting
-  unresponsive by exhausting processes/threads.
+  processes/threads.
 - You may need elevated limits (ulimit or sysctl) to run high-stress tests.
 - Running heavy tests on shared systems or laptops can disrupt other users and
   risk data loss if the system becomes unstable.

run_all_experiments.sh

@@ -142,12 +142,6 @@ compile_fork_bomb() {
     "$ROOT_DIR/fork_bomb/fork_bomb.c"
 }
 
-compile_max_limit() {
-  log "Compiling stress"
-  gcc -O2 -o "$ROOT_DIR/Maximum_limit_stress_test/stress" \
-    "$ROOT_DIR/Maximum_limit_stress_test/stress.c"
-}
-
 compile_thread_stress() {
   log "Compiling thread_stress"
   gcc -O2 -pthread -o "$ROOT_DIR/thread_stress_test/thread_stress" \
@@ -156,13 +150,11 @@ compile_thread_stress() {
 
 compile_creation_time
 compile_fork_bomb
-compile_max_limit
 compile_thread_stress
 
 # Defaults (override by env vars)
 ALLOW_DANGEROUS=${ALLOW_DANGEROUS:-0}
 FORK_BOMB_SECONDS=${FORK_BOMB_SECONDS:-5}
-MAX_LIMIT_SECONDS=${MAX_LIMIT_SECONDS:-5}
 CREATION_TIME_ITERS=${CREATION_TIME_ITERS:-"100 1000 10000"}
 CREATION_TIME_SECONDS=${CREATION_TIME_SECONDS:-60}
 
@@ -186,17 +178,6 @@ else
   echo "timestamp,elapsed_s,load1,load5,load15,mem_total_kb,mem_available_kb,mem_used_kb,proc_count,thread_count_total,pid,cpu_pct,rss_kb,vsz_kb,stack_kb,heap_kb,proc_threads" > "$OUT_DIR/fork_bomb.csv"
 fi
 
-if [ "$ALLOW_DANGEROUS" -eq 1 ]; then
-  run_with_sampling \
-    "max_limit_stress" \
-    "cd '$ROOT_DIR/Maximum_limit_stress_test' && ./stress" \
-    "$OUT_DIR/max_limit_stress.csv" \
-    "$MAX_LIMIT_SECONDS"
-else
-  log "Skipping max_limit_stress (set ALLOW_DANGEROUS=1 to run)"
-  echo "timestamp,elapsed_s,load1,load5,load15,mem_total_kb,mem_available_kb,mem_used_kb,proc_count,thread_count_total,pid,cpu_pct,rss_kb,vsz_kb,stack_kb,heap_kb,proc_threads" > "$OUT_DIR/max_limit_stress.csv"
-fi
-
 run_with_sampling \
   "thread_recursive_scaling" \
   "cd '$ROOT_DIR/thread_recursive_scaling' && ./run_thread_recursive.sh" \

tasks.md

@@ -29,9 +29,6 @@ to understand how the operating system balances efficiency and isolation.
 - [x] Thread Recursive Scaling:  
     Similar recursive creation using threads to compare scalability and resource usage against  
     fork().
-- [x] Maximum Limit Stress Test:  
-    Continuously creates processes or threads until the system refuses further creation,  
-    revealing OS-enforced limits on concurrency.
 - [ ] Memory and Stability Observation(removed max forks with ulimit -u 20000):  
     Monitors system memory usage and system responsiveness during heavy process and  
     thread creation.
@@ -59,23 +56,34 @@ Citations will include:
 ulimit -u unlimited
 
 # Raise kernel PID/thread caps (temporary until reboot)
-sudo sysctl -w kernel.pid_max=131072
+sysctl -w kernel.pid_max=131072
-sudo sysctl -w kernel.threads-max=131072
+sysctl -w kernel.threads-max=131072
 
-# Lift cgroup v2 pids limit (temporary until reboot)
+
-sudo sh -c 'echo max > /sys/fs/cgroup/pids.max'
+# cgroup v2 setup (Alpine Linux)
+mkdir -p /sys/fs/cgroup/test
+echo max > /sys/fs/cgroup/test/pids.max
+echo $$ > /sys/fs/cgroup/test/cgroup.procs
+```
+
+
+
+## Clean-up commands run after tests:
+```
+# Cleanup to make it non-persistent (move out, then delete)
+echo $$ > /sys/fs/cgroup/cgroup.procs
+rmdir /sys/fs/cgroup/test
 ```
 
 ## Crash/Stress Behavior (Runner Env Vars)
 
 The runner script uses the following environment variables to control risky experiments:
 
-- `ALLOW_DANGEROUS=1` to enable `fork_bomb` and `max_limit_stress` (default: 0).
+- `ALLOW_DANGEROUS=1` to enable `fork_bomb` (default: 0).
 - `FORK_BOMB_SECONDS=<seconds>` to timebox `fork_bomb` runtime.
-- `MAX_LIMIT_SECONDS=<seconds>` to timebox `max_limit_stress` runtime.
 
 Example:
 
 ```sh
-ALLOW_DANGEROUS=1 FORK_BOMB_SECONDS=5 MAX_LIMIT_SECONDS=5 bash run_all_experiments.sh
+ALLOW_DANGEROUS=1 FORK_BOMB_SECONDS=5 bash run_all_experiments.sh
 ```