sadc: Save HZ value in sa datafile header

This parameter gives the number of jiffies per second on the machine
that created the file. It is now saved in file's header.

Signed-off-by: Sebastien GODARD <sysstat@users.noreply.github.com>

diff --git a/sa.h b/sa.h
index b784c42a686aa069635ba30071c68c95085be39d..3c5446229119db55086eff17c7ad06a007b24a5b 100644 (file)
--- a/sa.h
+++ b/sa.h
@@ -427,10 +427,14 @@ struct file_header {
         * Timestamp in seconds since the epoch.
         */
        unsigned long long sa_ust_time;
+       /*
+        * Number of jiffies per second.
+        */
+       unsigned long sa_hz             __attribute__ ((aligned (8)));
        /*
         * Number of CPU items (1 .. CPU_NR + 1) for the last sample in file.
         */
-       unsigned int sa_last_cpu_nr;
+       unsigned int sa_last_cpu_nr     __attribute__ ((aligned (8)));
        /*
         * Number of activities saved in file.
         */

diff --git a/sadc.c b/sadc.c
index 65541e59475e1ae0c4771d104ddf9726e733c58d..9cabc0dc951733a13db8f19911ef4aa75c7f39b3 100644 (file)
--- a/sadc.c
+++ b/sadc.c
@@ -514,6 +514,7 @@ void setup_file_hdr(int fd)
        file_hdr.sa_month       = rectime.tm_mon;
        file_hdr.sa_year        = rectime.tm_year;
        file_hdr.sa_sizeof_long = sizeof(long);
+       file_hdr.sa_hz          = HZ;
 
        for (i = 0; i < 3; i++) {
                file_hdr.act_types_nr[i] = act_types_nr[i];

diff --git a/sadf_misc.c b/sadf_misc.c
index 6a37a88ef94c8176d655c3510f91eefa929167af..b1ec39577e513072cdbf1241aee7b3ae809d396d 100644 (file)
--- a/sadf_misc.c
+++ b/sadf_misc.c
@@ -866,6 +866,7 @@ __printf_funct_t print_hdr_header(void *parm, int action, char *dfile,
                }
 
                printf(_("Size of a long int: %d\n"), file_hdr->sa_sizeof_long);
+               printf("HZ = %lu\n", file_hdr->sa_hz);
 
                /* Number of activities (number of volatile activities) in file */
                printf("sa_act_nr (sa_vol_act_nr): %u (%u)\n",