diff options
Diffstat (limited to 'src/backend/utils')
| -rw-r--r-- | src/backend/utils/misc/Makefile | 4 | ||||
| -rw-r--r-- | src/backend/utils/misc/pg_rusage.c | 75 |
2 files changed, 77 insertions, 2 deletions
diff --git a/src/backend/utils/misc/Makefile b/src/backend/utils/misc/Makefile index afa3216558..5153366b28 100644 --- a/src/backend/utils/misc/Makefile +++ b/src/backend/utils/misc/Makefile @@ -4,7 +4,7 @@ # Makefile for utils/misc # # IDENTIFICATION -# $PostgreSQL: pgsql/src/backend/utils/misc/Makefile,v 1.23 2005/02/26 18:43:33 tgl Exp $ +# $PostgreSQL: pgsql/src/backend/utils/misc/Makefile,v 1.24 2005/10/03 22:52:23 tgl Exp $ # #------------------------------------------------------------------------- @@ -14,7 +14,7 @@ include $(top_builddir)/src/Makefile.global override CPPFLAGS := -I$(srcdir) $(CPPFLAGS) -OBJS = guc.o help_config.o ps_status.o superuser.o +OBJS = guc.o help_config.o pg_rusage.o ps_status.o superuser.o # This location might depend on the installation directories. Therefore # we can't subsitute it into pg_config.h. diff --git a/src/backend/utils/misc/pg_rusage.c b/src/backend/utils/misc/pg_rusage.c new file mode 100644 index 0000000000..a4a6d9e586 --- /dev/null +++ b/src/backend/utils/misc/pg_rusage.c @@ -0,0 +1,75 @@ +/*------------------------------------------------------------------------- + * + * pg_rusage.c + * Resource usage measurement support routines. + * + * + * Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group + * Portions Copyright (c) 1994, Regents of the University of California + * + * + * IDENTIFICATION + * $PostgreSQL: pgsql/src/backend/utils/misc/pg_rusage.c,v 1.1 2005/10/03 22:52:23 tgl Exp $ + * + *------------------------------------------------------------------------- + */ +#include "postgres.h" + +#include <unistd.h> + +#include "utils/pg_rusage.h" + + +/* + * Initialize usage snapshot. + */ +void +pg_rusage_init(PGRUsage *ru0) +{ + struct timezone tz; + + getrusage(RUSAGE_SELF, &ru0->ru); + gettimeofday(&ru0->tv, &tz); +} + +/* + * Compute elapsed time since ru0 usage snapshot, and format into + * a displayable string. Result is in a static string, which is + * tacky, but no one ever claimed that the Postgres backend is + * threadable... + */ +const char * +pg_rusage_show(const PGRUsage *ru0) +{ + static char result[100]; + PGRUsage ru1; + + pg_rusage_init(&ru1); + + if (ru1.tv.tv_usec < ru0->tv.tv_usec) + { + ru1.tv.tv_sec--; + ru1.tv.tv_usec += 1000000; + } + if (ru1.ru.ru_stime.tv_usec < ru0->ru.ru_stime.tv_usec) + { + ru1.ru.ru_stime.tv_sec--; + ru1.ru.ru_stime.tv_usec += 1000000; + } + if (ru1.ru.ru_utime.tv_usec < ru0->ru.ru_utime.tv_usec) + { + ru1.ru.ru_utime.tv_sec--; + ru1.ru.ru_utime.tv_usec += 1000000; + } + + snprintf(result, sizeof(result), + "CPU %d.%02ds/%d.%02du sec elapsed %d.%02d sec", + (int) (ru1.ru.ru_stime.tv_sec - ru0->ru.ru_stime.tv_sec), + (int) (ru1.ru.ru_stime.tv_usec - ru0->ru.ru_stime.tv_usec) / 10000, + (int) (ru1.ru.ru_utime.tv_sec - ru0->ru.ru_utime.tv_sec), + (int) (ru1.ru.ru_utime.tv_usec - ru0->ru.ru_utime.tv_usec) / 10000, + (int) (ru1.tv.tv_sec - ru0->tv.tv_sec), + (int) (ru1.tv.tv_usec - ru0->tv.tv_usec) / 10000); + + return result; +} |