/**
* @brief Function to set the descriptions and cores for each core group
*
* Takes a string containing individual cores and groups of cores and
* breaks it into substrings which are used to set core group values
*
* @param s string containing cores to be divided into substrings
* @param tab table of core groups to set values in
* @param max maximum number of core groups allowed
*
* @return Number of core groups set up
* @retval -1 on error
*/
static int
strtocgrps(char *s, struct core_group *tab, const unsigned max)
{
unsigned i, n, index = 0;
uint64_t cbuf[PQOS_MAX_CORES];
char *non_grp = NULL;
ASSERT(tab != NULL);
ASSERT(max > 0);
if (s == NULL)
return index;
while ((non_grp = strsep(&s, "[")) != NULL) {
int ret;
/**
* If group contains single core
*/
if ((strlen(non_grp)) > 0) {
n = strlisttotab(non_grp, cbuf, (max-index));
if ((index+n) > max)
return -1;
/* set core group info */
for (i = 0; i < n; i++) {
char *desc = uinttostr((unsigned)cbuf[i]);
ret = set_cgrp(&tab[index], desc, &cbuf[i], 1);
if (ret < 0)
return -1;
index++;
}
}
/**
* If group contains multiple cores
*/
char *grp = strsep(&s, "]");
if (grp != NULL) {
char *desc = NULL;
selfn_strdup(&desc, grp);
n = strlisttotab(grp, cbuf, (max-index));
if (index+n > max) {
free(desc);
return -1;
}
/* set core group info */
ret = set_cgrp(&tab[index], desc, cbuf, n);
if (ret < 0) {
free(desc);
return -1;
}
index++;
}
}
return index;
}
/**
* @brief Stores the process id's given in a table for future use
*
* @param str string of process id's
*/
static void
sel_store_process_id(char *str)
{
uint64_t processes[PQOS_MAX_PIDS];
unsigned i = 0, n = 0;
enum pqos_mon_event evt = 0;
parse_event(str, &evt);
n = strlisttotab(strchr(str, ':') + 1, processes, DIM(processes));
if (n == 0)
parse_error(str, "No process id selected for monitoring");
if (n >= DIM(sel_monitor_pid_tab))
parse_error(str,
"too many processes selected "
"for monitoring");
/**
* For each process:
* - if it's already there in the sel_monitor_pid_tab
* - update the entry
* - else - add it to the sel_monitor_pid_tab
*/
for (i = 0; i < n; i++) {
int j, found = 0;
for (j = 0; j < sel_process_num &&
j < (int) DIM(sel_monitor_pid_tab); j++) {
if (sel_monitor_pid_tab[j].pid == (pid_t)processes[i]) {
sel_monitor_pid_tab[j].events |= evt;
found = 1;
break;
}
}
if (!found &&
sel_process_num < (int) DIM(sel_monitor_pid_tab)) {
struct pid_group *pg =
&sel_monitor_pid_tab[sel_process_num];
pg->pid = (pid_t)processes[i];
pg->events = evt;
pg->pgrp = malloc(sizeof(*pg->pgrp));
if (pg->pgrp == NULL) {
printf("Error with memory allocation");
exit(EXIT_FAILURE);
}
++sel_process_num;
}
}
}
/**
* @brief Verifies and translates allocation association config string into
* internal configuration.
*
* @param str string passed to -a command line option
*/
static void
parse_allocation_assoc(char *str)
{
uint64_t cores[PQOS_MAX_CORES];
unsigned i = 0, n = 0, cos = 0;
char *p = NULL;
if (strncasecmp(str, "llc:", 4) != 0)
parse_error(str, "Unrecognized allocation type");
str += strlen("llc:");
p = strchr(str, '=');
if (p == NULL)
parse_error(str,
"Invalid allocation class of service "
"association format");
*p = '\0';
cos = (unsigned) strtouint64(str);
n = strlisttotab(p+1, cores, DIM(cores));
if (n == 0)
return;
if (sel_cat_assoc_num <= 0) {
for (i = 0; i < n; i++) {
if (i >= DIM(sel_cat_assoc_tab))
parse_error(str,
"too many cores selected for "
"allocation association");
sel_cat_assoc_tab[i].core = (unsigned) cores[i];
sel_cat_assoc_tab[i].class_id = cos;
}
sel_cat_assoc_num = (int) n;
return;
}
for (i = 0; i < n; i++) {
int j;
for (j = 0; j < sel_cat_assoc_num; j++)
if (sel_cat_assoc_tab[j].core == (unsigned) cores[i])
break;
if (j < sel_cat_assoc_num) {
/**
* this core is already on the list
* - update COS but warn about it
*/
printf("warn: updating COS for core %u from %u to %u\n",
(unsigned) cores[i],
sel_cat_assoc_tab[j].class_id, cos);
sel_cat_assoc_tab[j].class_id = cos;
} else {
/**
* New core is selected - extend the list
*/
unsigned k = (unsigned) sel_cat_assoc_num;
if (k >= DIM(sel_cat_assoc_tab))
parse_error(str,
"too many cores selected for "
"allocation association");
sel_cat_assoc_tab[k].core = (unsigned) cores[i];
sel_cat_assoc_tab[k].class_id = cos;
sel_cat_assoc_num++;
}
}
}
/**
* @brief Verifies and translates definition of allocation class of service
* from text string into internal configuration.
*
* @param str string passed to -e command line option
*/
static void
parse_allocation_class(char *str)
{
char *s, *q, *p = NULL;
char *saveptr = NULL;
uint64_t *sp = NULL;
uint64_t sockets[PQOS_MAX_SOCKETS];
unsigned i, n = 1;
enum sel_cat_type type;
s = strdup(str);
if (s == NULL)
s = str;
p = strchr(str, ':');
if (p == NULL)
parse_error(str, "Unrecognized allocation format");
/**
* Set up selected sockets table
*/
q = strchr(str, '@');
if (q != NULL) {
/**
* Socket ID's selected - set up sockets table
*/
*p = '\0';
*q = '\0';
n = strlisttotab(++q, sockets, DIM(sockets));
if (n == 0)
parse_error(s, "No socket ID specified");
/**
* Check selected sockets are within range
*/
for (i = 0; i < n; i++)
if (sockets[i] >= PQOS_MAX_SOCKETS)
parse_error(s, "Socket ID out of range");
sp = sockets;
} else
*p = '\0';
/**
* Determine selected CAT type (L3/L2)
*/
if (strcasecmp(str, "llc") == 0)
type = L3CA;
else if (strcasecmp(str, "l2") == 0)
type = L2CA;
else
parse_error(s, "Unrecognized allocation type");
/**
* Parse COS masks and apply to selected sockets
*/
for (++p; ; p = NULL) {
char *token = NULL;
token = strtok_r(p, ",", &saveptr);
if (token == NULL)
break;
parse_allocation_cos(token, sp, n, type);
}
free(s);
}
