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atrun(8): scale default load average limit with the number of CPUs
Previously atrun refused to run jobs if load average was not below fixed limit of 1.5. PR: 173175 Reviewed by: peterj Approved by: trasz (mentor) MFC after: 2 weeks
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=242372
@ -33,6 +33,9 @@ static const char rcsid[] =
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#include <sys/fcntl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#ifdef __FreeBSD__
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#include <sys/sysctl.h>
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#endif
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#include <sys/wait.h>
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#include <sys/param.h>
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#include <ctype.h>
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@ -454,7 +457,12 @@ main(int argc, char *argv[])
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gid_t batch_gid;
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int c;
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int run_batch;
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#ifdef __FreeBSD__
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size_t ncpu, ncpusz;
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double load_avg = -1;
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#else
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double load_avg = LOADAVG_MX;
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#endif
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/* We don't need root privileges all the time; running under uid and gid daemon
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* is fine.
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@ -472,8 +480,10 @@ main(int argc, char *argv[])
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case 'l':
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if (sscanf(optarg, "%lf", &load_avg) != 1)
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perr("garbled option -l");
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#ifndef __FreeBSD__
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if (load_avg <= 0.)
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load_avg = LOADAVG_MX;
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#endif
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break;
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case 'd':
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@ -489,6 +499,15 @@ main(int argc, char *argv[])
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if (chdir(ATJOB_DIR) != 0)
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perr("cannot change to %s", ATJOB_DIR);
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#ifdef __FreeBSD__
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if (load_avg <= 0.) {
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ncpusz = sizeof(size_t);
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if (sysctlbyname("hw.ncpu", &ncpu, &ncpusz, NULL, 0) < 0)
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ncpu = 1;
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load_avg = LOADAVG_MX * ncpu;
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}
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#endif
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/* Main loop. Open spool directory for reading and look over all the
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* files in there. If the filename indicates that the job should be run
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* and the x bit is set, fork off a child which sets its user and group
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@ -1,5 +1,5 @@
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.\" $FreeBSD$
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.Dd June 17, 2007
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.Dd October 30, 2012
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.Dt ATRUN 8
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.Os
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.Sh NAME
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@ -45,7 +45,7 @@ e.g., locked out or expired.
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.Bl -tag -width indent
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.It Fl l Ar load_avg
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Specify a limiting load factor, over which batch jobs should
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not be run, instead of the compiled in default of 1.5.
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not be run, instead of the default of 1.5 * number of active CPUs.
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.It Fl d
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Debug; print error messages to standard error instead of using
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.Xr syslog 3 .
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