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Fix #340, Add cpu affinity example #341

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merged 1 commit into from
May 19, 2022
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Fix #340, Add cpu affinity example #341

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18 changes: 17 additions & 1 deletion fsw/pc-linux/src/cfe_psp_start.c
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Original file line number Diff line number Diff line change
Expand Up @@ -151,7 +151,8 @@ static const struct option longOpts[] = {{"reset", required_argument, NULL, 'R'}
*/
int32 CFE_PSP_OS_EventHandler(OS_Event_t event, osal_id_t object_id, void *data)
{
char taskname[OS_MAX_API_NAME];
char taskname[OS_MAX_API_NAME];
cpu_set_t cpuset;

switch (event)
{
Expand All @@ -170,6 +171,21 @@ int32 CFE_PSP_OS_EventHandler(OS_Event_t event, osal_id_t object_id, void *data)
/* Get the name from OSAL and propagate to the pthread/system layer */
if (OS_GetResourceName(object_id, taskname, sizeof(taskname)) == OS_SUCCESS)
{
/*
* Example mechanism for setting thread affinity
*
* Could assign based on task name, pattern within name (CFE_* on 0,
* *_CN where N is desired core), round robin or whatever the requrements are.
*
* Just assigning all "CFE_*" tasks to core zero and let the rest float.
*/
if (strncmp(taskname, "CFE_", 4) == 0)
{
CPU_ZERO(&cpuset);
CPU_SET(0, &cpuset);
pthread_setaffinity_np(pthread_self(), sizeof(cpuset), &cpuset);
}

/*
* glibc/kernel has an internal limit for this name.
* If the OSAL name is longer, just truncate it.
Expand Down