- client: add --no_priority_change cmdline arg

(and <no_priority_change> flag in cc_config.xml).
    If set, run apps at same priority as client.

svn path=/trunk/boinc/; revision=17639

checkin_notes

@@ -3177,3 +3177,13 @@ David  20 Mar 2009
         cpu_sched.cpp
         cs_statefile.cpp
         log_flags.cpp,h
+
+David  20 Mar 2009
+    - client: add --no_priority_change cmdline arg
+        (and <no_priority_change> flag in cc_config.xml).
+        If set, run apps at same priority as client.
+
+    client/
+        app_start.cpp
+        cs_cmdline.cpp
+        log_flags.cpp,h

client/app_start.cpp

@@ -580,7 +580,14 @@ int ACTIVE_TASK::start(bool first_time) {
 
     relative_to_absolute(slot_dir, slotdirpath);
     bool success = false;
-    int prio_mask = high_priority?BELOW_NORMAL_PRIORITY_CLASS:IDLE_PRIORITY_CLASS;
+    int prio_mask;
+    if (config.no_priority_change) {
+        prio_mask = 0;
+    } else if (high_priority) {
+        prio_mask = BELOW_NORMAL_PRIORITY_CLASS;
+    } else {
+        prio_mask = IDLE_PRIORITY_CLASS;
+    }
 
     for (i=0; i<5; i++) {
         if (sandbox_account_service_token != NULL) {
@@ -736,10 +743,12 @@ int ACTIVE_TASK::start(bool first_time) {
         );
     }
 
-    if (setpriority(PRIO_PROCESS, pid,
-        high_priority?PROCESS_MEDIUM_PRIORITY:PROCESS_IDLE_PRIORITY)
-    ) {
-        perror("setpriority");
+    if (!config.no_priority_change) {
+        if (setpriority(PRIO_PROCESS, pid,
+            high_priority?PROCESS_MEDIUM_PRIORITY:PROCESS_IDLE_PRIORITY)
+        ) {
+            perror("setpriority");
+        }
     }
 
 #else
@@ -861,10 +870,12 @@ int ACTIVE_TASK::start(bool first_time) {
         freopen(STDERR_FILE, "a", stderr);
 
 #ifdef HAVE_SETPRIORITY
-        if (setpriority(PRIO_PROCESS, 0,
-            high_priority?PROCESS_MEDIUM_PRIORITY:PROCESS_IDLE_PRIORITY)
-        ) {
-            perror("setpriority");
+        if (!config.no_priority_change) {
+            if (setpriority(PRIO_PROCESS, 0,
+                high_priority?PROCESS_MEDIUM_PRIORITY:PROCESS_IDLE_PRIORITY)
+            ) {
+                perror("setpriority");
+            }
         }
 #endif
         sprintf(cmdline, "%s %s", wup->command_line.c_str(), app_version->cmdline);

client/cs_cmdline.cpp

@@ -64,6 +64,7 @@ static void print_options(char* prog) {
         "    --master_fetch_period N        reload master URL after N RPC failures\n"
         "    --master_fetch_retry_cap N     exponential backoff limit\n"
         "    --no_gui_rpc                   don't allow GUI RPC, don't make socket\n"
+        "    --no_priority_change           run apps at same priority as client\n"
         "    --pers_giveup N                giveup time for persistent file xfer\n"
         "    --pers_retry_delay_max N       max for file xfer exponential backoff\n"
         "    --pers_retry_delay_min N       min for file xfer exponential backoff\n"
@@ -173,6 +174,8 @@ void CLIENT_STATE::parse_cmdline(int argc, char** argv) {
             else master_fetch_retry_cap = atoi(argv[++i]);
         } else if (ARG(no_gui_rpc)) {
             no_gui_rpc = true;
+        } else if (ARG(no_priority_change)) {
+            config.no_priority_change = true;
         } else if (ARG(pers_giveup)) {
             if (i == argc-1) show_options = true;
             else pers_giveup = atoi(argv[++i]);

client/log_flags.cpp

@@ -193,6 +193,7 @@ void CONFIG::defaults() {
     network_test_url = "http://www.google.com/";
     no_gpus = false;
     zero_debts = false;
+    no_priority_change = false;
 }
 
 int CONFIG::parse_options(XML_PARSER& xp) {
@@ -263,6 +264,7 @@ int CONFIG::parse_options(XML_PARSER& xp) {
         }
         if (xp.parse_bool(tag, "no_gpus", no_gpus)) continue;
         if (xp.parse_bool(tag, "zero_debts", zero_debts)) continue;
+        if (xp.parse_bool(tag, "no_priority_change", no_priority_change)) continue;
         if (xp.parse_bool(tag, "abort_jobs_on_exit", btemp)) {
             gstate.abort_jobs_on_exit = true;
             continue;

client/log_flags.h

@@ -133,6 +133,7 @@ struct CONFIG {
     std::string network_test_url;
     bool no_gpus;
     bool zero_debts;
+    bool no_priority_change;
 
     CONFIG();
     void defaults();