Manpages

NAME

drmaa_synchronize, drmaa_wait, drmaa_wifexited, drmaa_wexitstatus, drmaa_wifsignaled, drmaa_wtermsig, drmaa_wcoredump, drmaa_wifaborted - Waiting for jobs to finish

SYNOPSIS

#include "drmaa.h"

int drmaa_synchronize(

const char *job_ids[],
signed long timeout,
int dispose,
char *error_diagnosis,
size_t error_diag_len

);

int drmaa_wait(

const char *job_id,
char *job_id_out,
size_t job_id_out_len,
int *stat,
signed long timeout,
drmaa_attr_values_t **rusage,
char *error_diagnosis,
size_t error_diagnois_len

);

int drmaa_wifaborted(

int *aborted,
int stat,
char *error_diagnosis,
size_t error_diag_len

);

int drmaa_wifexited(

int *exited,
int stat,
char *error_diagnosis,
size_t error_diag_len

);

int drmaa_wifsignaled(

int *signaled,
int stat,
char *error_diagnosis,
size_t error_diag_len

);

int drmaa_wcoredump(

int *core_dumped,
int stat,
char *error_diagnosis,
size_t error_diag_len

);

int drmaa_wexitstatus(

int *exit_status,
int stat,
char *error_diagnosis,
size_t error_diag_len

);

int drmaa_wtermsig(

char *signal,
size_t signal_len,
int stat,
char *error_diagnosis,
size_t error_diag_len

);

DESCRIPTION

The drmaa_synchronize() function blocks the calling thread until all jobs specified in job_ids have failed or finished execution. If job_ids contains ’DRMAA_JOB_IDS_SESSION_ALL’, then this function waits for all jobs submitted during this DRMAA session. The job_ids pointer array must be NULL terminated.

To prevent blocking indefinitely in this call, the caller may use the timeout, specifying how many seconds to wait for this call to complete before timing out. The special value DRMAA_TIMEOUT_WAIT_FOREVER can be used to wait indefinitely for a result. The special value DRMAA_TIMEOUT_NO_WAIT can be used to return immediately. If the call exits before timeout seconds, all the specified jobs have completed or the calling thread received an interrupt. In both cases, the return code is DRMAA_ERRNO_EXIT_TIMEOUT.

The dispose parameter specifies how to treat reaping information. If ’0’ is passed to this parameter, job finish information will still be available when drmaa_wait(3) is used. If ’1’ is passed, drmaa_wait(3) will be unable to access this job’s finish information.

drmaa_wait()
The drmaa_wait() function blocks the calling thread until a job fails or finishes execution. This routine is modeled on the wait4(3) routine. If the special string ’DRMAA_JOB_IDS_SESSION_ANY’ is passed as job_id, this routine will wait for any job from the session. Otherwise the job_id must be the job identifier of a job or array job task that was submitted during the session.

To prevent blocking indefinitely in this call, the caller may use timeout, specifying how many seconds to wait for this call to complete before timing out. The special value DRMAA_TIMEOUT_WAIT_FOREVER can be to wait indefinitely for a result. The special value DRMAA_TIMEOUT_NO_WAIT can be used to return immediately. If the call exits before timeout seconds have passed, all the specified jobs have completed or the calling thread received an interrupt. In both cases, the return code is DRMAA_ERRNO_EXIT_TIMEOUT.

The routine reaps jobs on a successful call, so any subsequent calls to drmaa_wait(3) will fail returning a DRMAA_ERRNO_INVALID_JOB error, meaning that the job has already been reaped. This error is the same as if the job were unknown. Returning due to an elapsed timeout or an interrupt does not cause the job information to be reaped. This means that, in this case, it is possible to issue drmaa_wait(3) multiple times for the same job_id.

If job_id_out is not a null pointer, then on return from a successful drmaa_wait(3) call, up to job_id_out_len characters from the job id of the failed or finished job are returned.

If stat is not a null pointer, then on return from a successful drmaa_wait(3) call, the status of the job is stored in the integer pointed to by stat. stat indicates whether job failed or finished and other information. The information encoded in the integer value can be accessed via drmaa_wifaborted(3), drmaa_wifexited(3), drmaa_wifsignaled(3), drmaa_wcoredump(3), drmaa_wexitstatus(3), and drmaa_wtermsig(3).

If rusage is not a null pointer, then on return from a successful drmaa_wait(3) call, a summary of the resources used by the terminated job is returned in form of a DRMAA values string vector. The entries in the DRMAA values string vector can be extracted using drmaa_get_next_attr_value(3). Each string returned by drmaa_get_next_attr_value(3) will be of the format name=value, where name and value specify name and amount of resources consumed by the job, respectively. See accounting(5) for an explanation of the resource information.

drmaa_wifaborted()
The drmaa_wifaborted() function evaluates into the integer pointed to by aborted a non-zero value if stat was returned from a job that ended before entering the running state.

drmaa_wifexited()
The drmaa_wifexited() function evaluates into the integer pointed to by exited a non-zero value if stat was returned from a job that terminated normally. A zero value can also indicate that although the job has terminated normally, an exit status is not available, or that it is not known whether the job terminated normally. In both cases drmaa_wexitstatus(3) will not provide exit status information. A non-zero value returned in exited indicates more detailed diagnosis can be provided by means of drmaa_wifsignaled(3), drmaa_wtermsig(3) and drmaa_wcoredump(3).

drmaa_wifsignaled()
The drmaa_wifsignaled() function evaluates into the integer pointed to by signaled a non-zero value if stat was returned for a job that terminated due to the receipt of a signal. A zero value can also indicate that although the job has terminated due to the receipt of a signal, the signal is not available, or it is not known whether the job terminated due to the receipt of a signal. In both cases drmaa_wtermsig(3) will not provide signal information. A non-zero value returned in signaled indicates signal information can be retrieved by means of drmaa_wtermsig(3).

drmaa_wcoredump()
If drmaa_wifsignaled(3) returned a non-zero value in the signaled parameter, the drmaa_wcoredump() function evaluates into the integer pointed to by core_dumped a non-zero value if a core image of the terminated job was created.

drmaa_wexitstatus()
If drmaa_wifexited(3) returned a non-zero value in the exited parameter, the drmaa_wexitstatus() function evaluates into the integer pointed to by exit_code the exit code that the job passed to exit(2) or the value that the child process returned from main.

drmaa_wtermsig()
If drmaa_wifsignaled(3) returned a non-zero value in the signaled parameter, the drmaa_wtermsig() function evaluates into signal up to signal_len characters of a string representation of the signal that caused the termination of the job. For signals declared by POSIX.1, the symbolic names are returned (e.g., SIGABRT, SIGALRM). For signals not declared by POSIX, any other string may be returned.

ENVIRONMENTAL VARIABLES

The name of the cell specified in the environment variable SGE_CELL, if it is set.

The name of the default cell, i.e. default.

SGE_DEBUG_LEVEL

If set, specifies that debug information should be written to stderr. In addition the level of detail in which debug information is generated is defined.

SGE_QMASTER_PORT

If set, specifies the tcp port on which sge_qmaster(8) is expected to listen for communication requests. Most installations will use a services map entry instead to define that port.

RETURN VALUES

Upon successful completion, drmaa_run_job(), drmaa_run_bulk_jobs(), and drmaa_get_next_job_id() return DRMAA_ERRNO_SUCCESS. Other values indicate an error. Up to error_diag_len characters of error related diagnosis information is then provided in the buffer error_diagnosis.

ERRORS

The drmaa_synchronize(), drmaa_wait(), drmaa_wifexited(), drmaa_wexitstatus(), drmaa_wifsignaled(), drmaa_wtermsig(), drmaa_wcoredump(), and drmaa_wifaborted() functions can fail with:
DRMAA_ERRNO_INTERNAL_ERROR

Unexpected or internal DRMAA error, like system call failure, etc.

DRMAA_ERRNO_DRM_COMMUNICATION_FAILURE

Could not contact DRM system for this request.

DRMAA_ERRNO_AUTH_FAILURE

The specified request is not processed successfully due to authorization failure.

DRMAA_ERRNO_INVALID_ARGUMENT

The input value for an argument is invalid.

DRMAA_ERRNO_NO_ACTIVE_SESSION

Failed because there is no active session.

DRMAA_ERRNO_NO_MEMORY

Failed allocating memory.

The drmaa_synchronize() and drmaa_wait() functions can fail with:
DRMAA_ERRNO_EXIT_TIMEOUT

Time-out condition.

DRMAA_ERRNO_INVALID_JOB

The job specified by the does not exist.

The drmaa_wait() can fail with:
DRMAA_ERRNO_NO_RUSAGE

This error code is returned by drmaa_wait() when a job has finished but no rusage and stat data could be provided.

SEE ALSO

drmaa_submit(3).