at/at-adjust_load_to_cpu_count.patch

60 lines
1.9 KiB
Diff

Index: at-3.1.23/at.1.in
===================================================================
--- at-3.1.23.orig/at.1.in
+++ at-3.1.23/at.1.in
@@ -68,6 +68,9 @@ deletes jobs, identified by their job nu
executes commands when system load levels permit; in other words, when the load average
drops below @LOADAVG_MX@, or the value specified in the invocation of
.BR atd .
+Note that because of the load meaning on Linux,
+this number is multiplied by the amount of CPUs when compared to the
+system loadavg.
.PP
.B At
allows fairly complex time
Index: at-3.1.23/atd.c
===================================================================
--- at-3.1.23.orig/atd.c
+++ at-3.1.23/atd.c
@@ -625,6 +625,7 @@ run_loop()
int run_batch;
static time_t next_batch = 0;
double currlavg[3];
+ int cpu_count = 1;
/* Main loop. Open spool directory for reading and look over all the
* files in there. If the filename indicates that the job should be run,
@@ -775,7 +776,14 @@ run_loop()
#ifdef GETLOADAVG_PRIVILEGED
END_PRIV
#endif
- if (currlavg[0] < load_avg) {
+#ifdef _SC_NPROCESSORS_ONLN
+ cpu_count = sysconf(_SC_NPROCESSORS_ONLN);
+ if (cpu_count < 1) {
+ cpu_count = 1;
+ }
+#endif
+
+ if (currlavg[0] < load_avg * cpu_count) {
run_file(batch_name, batch_uid, batch_gid);
run_batch--;
}
Index: at-3.1.23/atd.8.in
===================================================================
--- at-3.1.23.orig/atd.8.in
+++ at-3.1.23/atd.8.in
@@ -20,10 +20,8 @@ runs jobs queued by
.B \-l
Specifies a limiting load factor, over which batch jobs should
not be run, instead of the compile-time choice of @LOADAVG_MX@.
-For an SMP system with
-.I n
-CPUs, you will probably want to set this higher than
-.IR n\-1.
+This number is multiplied by the amount of CPUs when comparing
+to /proc/loadavg, because loadavg is a sum over all processors on Linux.
.TP 8
.B \-b
Specify the minimum interval in seconds between the start of two