/*
***************************************************************************
* Read next sample statistics. If it's a special record (RESTART or COMMENT)
* then display it if requested. Also fill timestamps structures.
*
* IN:
* @ifd File descriptor
* @action Flags indicating if special records should be displayed or not.
*
* @curr Index in array for current sample statistics.
* @file System activity data file name (name of file being read).
* @rtype Record type (RESTART, COMMENT, etc.)
* @tab Number of tabulations to print.
* @file_actlst List of (known or unknown) activities in file.
* @file_magic System activity file magic header.
* @rectime Structure where timestamp (expressed in local time or in UTC
* depending on whether options -T/-t have been used or not) can
* be saved for current record.
* @loctime Structure where timestamp (expressed in local time) can be
* saved for current record.
*
* OUT:
* @rectime Structure where timestamp (expressed in local time or in UTC
* depending on whether options -T/-t have been used or not) has
* been saved for current record.
* @loctime Structure where timestamp (expressed in local time) has been
* saved for current record.
*
* RETURNS:
* TRUE if end of file has been reached.
***************************************************************************
*/
int read_next_sample(int ifd, int action, int curr, char *file, int *rtype, int tab,
struct file_magic *file_magic, struct file_activity *file_actlst,
struct tm *rectime, struct tm *loctime)
{
int eosaf;
/* Read current record */
eosaf = sa_fread(ifd, &record_hdr[curr], RECORD_HEADER_SIZE, SOFT_SIZE);
*rtype = record_hdr[curr].record_type;
if (!eosaf) {
if (*rtype == R_COMMENT) {
if (action & IGNORE_COMMENT) {
/* Ignore COMMENT record */
if (lseek(ifd, MAX_COMMENT_LEN, SEEK_CUR) < MAX_COMMENT_LEN) {
perror("lseek");
}
}
else {
/* Display COMMENT record */
print_special_record(curr, tm_start.use, tm_end.use, *rtype, ifd,
rectime, loctime, file, tab, file_magic);
}
}
else if (*rtype == R_RESTART) {
if (action & IGNORE_RESTART) {
/*
* Ignore RESTART record (don't display it)
* but anyway we have to reallocate volatile
* activities structures (unless we don't want to
* do it now).
*/
if (!(action & DONT_READ_VOLATILE)) {
read_vol_act_structures(ifd, act, file, file_magic,
file_hdr.sa_vol_act_nr);
}
}
else {
/* Display RESTART record */
print_special_record(curr, tm_start.use, tm_end.use, *rtype, ifd,
rectime, loctime, file, tab, file_magic);
}
}
else {
/*
* OK: Previous record was not a special one.
* So read now the extra fields.
*/
read_file_stat_bunch(act, curr, ifd, file_hdr.sa_act_nr,
file_actlst);
sa_get_record_timestamp_struct(flags, &record_hdr[curr], rectime, loctime);
}
}
return eosaf;
}
/*
***************************************************************************
* Display file contents in selected format (logic #2).
* Logic #2: Grouped by activity. Sorted by timestamp. Stop on RESTART
* records.
* Formats: ppc, CSV
*
* IN:
* @ifd File descriptor of input file.
* @file_actlst List of (known or unknown) activities in file.
* @cpu_nr Number of processors for current activity data file.
* @rectime Structure where timestamp (expressed in local time or in UTC
* depending on whether options -T/-t have been used or not) can
* be saved for current record.
* @loctime Structure where timestamp (expressed in local time) can be
* saved for current record.
* @file Name of file being read.
* @file_magic file_magic structure filled with file magic header data.
***************************************************************************
*/
void logic2_display_loop(int ifd, struct file_activity *file_actlst, __nr_t cpu_nr,
struct tm *rectime, struct tm *loctime, char *file,
struct file_magic *file_magic)
{
int i, p;
int curr = 1, rtype;
int eosaf = TRUE, reset = FALSE;
long cnt = 1;
off_t fpos;
/* Read system statistics from file */
do {
/*
* If this record is a special (RESTART or COMMENT) one, print it and
* (try to) get another one.
*/
do {
if (read_next_sample(ifd, IGNORE_NOTHING, 0,
file, &rtype, 0, file_magic, file_actlst,
rectime, loctime))
/* End of sa data file */
return;
}
while ((rtype == R_RESTART) || (rtype == R_COMMENT) ||
(tm_start.use && (datecmp(loctime, &tm_start) < 0)) ||
(tm_end.use && (datecmp(loctime, &tm_end) >= 0)));
/* Save the first stats collected. Used for example in next_slice() function */
copy_structures(act, id_seq, record_hdr, 2, 0);
/* Set flag to reset last_uptime variable. Should be done after a LINUX RESTART record */
reset = TRUE;
/* Save current file position */
if ((fpos = lseek(ifd, 0, SEEK_CUR)) < 0) {
perror("lseek");
exit(2);
}
/* Read and write stats located between two possible Linux restarts */
if (DISPLAY_HORIZONTALLY(flags)) {
/*
* If stats are displayed horizontally, then all activities
* are printed on the same line.
*/
rw_curr_act_stats(ifd, fpos, &curr, &cnt, &eosaf,
ALL_ACTIVITIES, &reset, file_actlst,
cpu_nr, rectime, loctime, file, file_magic);
}
else {
/* For each requested activity... */
for (i = 0; i < NR_ACT; i++) {
if (!id_seq[i])
continue;
p = get_activity_position(act, id_seq[i], EXIT_IF_NOT_FOUND);
if (!IS_SELECTED(act[p]->options))
continue;
if (!HAS_MULTIPLE_OUTPUTS(act[p]->options)) {
rw_curr_act_stats(ifd, fpos, &curr, &cnt, &eosaf,
act[p]->id, &reset, file_actlst,
cpu_nr, rectime, loctime, file,
file_magic);
}
else {
unsigned int optf, msk;
optf = act[p]->opt_flags;
for (msk = 1; msk < 0x100; msk <<= 1) {
if ((act[p]->opt_flags & 0xff) & msk) {
act[p]->opt_flags &= (0xffffff00 + msk);
rw_curr_act_stats(ifd, fpos, &curr, &cnt, &eosaf,
act[p]->id, &reset, file_actlst,
cpu_nr, rectime, loctime, file,
file_magic);
act[p]->opt_flags = optf;
}
}
}
}
}
if (!cnt) {
/* Go to next Linux restart, if possible */
do {
eosaf = read_next_sample(ifd, IGNORE_RESTART | DONT_READ_VOLATILE,
curr, file, &rtype, 0, file_magic,
file_actlst, rectime, loctime);
}
while (!eosaf && (rtype != R_RESTART));
}
/*
* The last record we read was a RESTART one: Print it.
* NB: Unlike COMMENTS records (which are displayed for each
* activity), RESTART ones are only displayed once.
*/
if (!eosaf && (record_hdr[curr].record_type == R_RESTART)) {
print_special_record(&record_hdr[curr], flags, &tm_start, &tm_end,
R_RESTART, ifd, rectime, loctime, file, 0,
file_magic, &file_hdr, act, fmt[f_position]);
}
}
while (!eosaf);
}
