Debug sleep should apply to all threads

Former-commit-id: 41b678814b2c2ff93935b57e630028aaf2e9ae62

src/debug.cpp

@@ -595,9 +595,19 @@ NULL
         double dtime = strtod(szFromObj(c->argv[2]),NULL);
         long long utime = dtime*1000000;
         struct timespec tv;
-
         tv.tv_sec = utime / 1000000;
         tv.tv_nsec = (utime % 1000000) * 1000;
+        
+        // Ensure all threads sleep
+        for (int iel = 0; iel < cserver.cthreads; ++iel)
+        {
+            if (iel == ielFromEventLoop(serverTL->el))
+                continue;   // we will sleep ourselves below
+            aePostFunction(g_pserver->rgthreadvar[iel].el, [tv]{
+                nanosleep(&tv, NULL);
+            });
+        }
+        
         nanosleep(&tv, NULL);
         addReply(c,shared.ok);
     } else if (!strcasecmp(szFromObj(c->argv[1]),"set-active-expire") &&