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Server psuedo-tweakage
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Copyright 2009 Nathan Phillip Brink, Ethan Zonca, Matthew Orlando
This file is a part of DistRen.
DistRen is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
DistRen is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with DistRen. If not, see <http://www.gnu.org/licenses/>.
*/
/* This file contains the code which both processes (renders) jobs as a slave, and the code which distributes frames to slaves after receiving them from the client portion of the codebase. */
/* Just some notes -- Ethan Zonca
* ++ Make data availible for other apps to parse
* Server<==>Client Communication
* Upload while rendering
*/
/* XML notes --
*
* First off, is XML in our build environment?
* Next, what files are we going to have?:
* - XML file sent with (.blend/.pov/.lux(xml)/whatever) by distren telling the server what to do
* + Includes submitter name, filename, emailaddress, etc
* - XML file on server storing info on current and finished jobs
* - XML file sent by distren when submitting a render to the server
*
* Overall, we could use XML to make our client/server communication load
* a lot lighter, especially if clients are sent customized xml files telling
* them what frame(s) to render... although that would be inefficient if rendering
* single frames. Maybe not tell it what frames to render in the xml file, the server
* can spit out that info.
*
* Please edit my ramblings if you please,
* --ethanzonca
*
*/
#include "execio.h"
#include "options.h"
#include "blendjob.h"
#include "protocol.h"
#include <confuse.h>
#include <stdio.h>
#include <stdlib.h>
#include <malloc.h>
#include <unistd.h> /* getopt */
#include <time.h>
/* ******************* Structs ************************ */
// Stores config info? editmycomment
struct distrend_config
{
cfg_t *mycfg;
struct options_common *options;
struct distrend_listen **listens; /*< Null terminated array of structs */
char *datadir;
};
/*
frame[frame] Status Assignments:
"NULL" - don't render me
"0" - canceled
"1" - unassigned
"2" - assigned to slave
"3" - completed by slave and uploaded
Have a script crawl through each job in the arrays, priority-biased, and assign a frame to each slave.
Then we will need some sort of watchdog to monitor slaves on the main server to check for stales. Maybe not worry about this for now.
*/
struct general_info {
short int jobs_in_queue; //
unsigned short int free_clients;
unsigned short int rendering_clients;//
unsigned short int total_finished_jobs; //
unsigned int total_frames_rendered; //
} general_info;
/*
internally defined funcs's prototypes
*/
void status_report_generator(struct blendjob **blendjobs_head);
void blendjob_remove(struct blendjob **head, struct blendjob *bj);
struct blendjob *blendjob_get(struct blendjob *head, jobnum_t jobnum);
/* Global Vars, try to cut down on these */
jobnum_t jobnum = 0; // The next job number to create in the queue
int hcfjob; // Highest consecutively finished job
int highest_jobnum; // The job number of the most recently created job, this is used when creating new jobs
/* ********************** Functions ************************* */
/* Functions to stubify */
/**
Performs command stored in a client's request.
*/
int distrend_do()
{
return 0;
}
/**
Accepts a client's connection
*/
void distrend_accept()
{
}
/**
Frees the action
*/
void distrend_action_free()
{
}
/**
Start listening
*/
void distrend_listen()
{
}
/**
Stop listening
*/
void distrend_unlisten()
{
}
/**
This is probably just a placeholder for remotio
*/
void remotio_send_to_client()
{
// I am futile!
}
/** Fill variables after crash / shutdown from XML dumps */
void start_data(){
if(1 == 0){
// retrieve total_finished_jobs and total_finished_frames from xml file
}
else{
general_info.total_finished_jobs = 0;
general_info.total_frames_rendered = 0;
}
}
// **** Finish-Setter: Sets a frame to the "completed" status.
void finish_frame(struct blendjob *blendjob, int frame){
blendjob->frameset[frame].status = 2;
blendjob->frameset[frame].time_to_render = (clock() - blendjob[jobnum].frameset[frame].start_time); // Consider changing time-to-render to time-for-frame or something?
general_info.total_frames_rendered++; // Increase total frames var for stats
}
// **** Queuer: Adds files to the queue
void queue(struct blendjob *blendjob, int type, char *name, char *submitter, char *email, int priority, int mode, int spp, struct frameset *frameset) {
// Type: 1 = blender, add more types later
// jobnum is the next available job number
if(type == 1){
blendjob->name = name;
blendjob->submitter = submitter;
blendjob->email = email;
blendjob->priority = priority;
blendjob->frameset = frameset;
}
else{
// Throw error.
}
jobnum++; // Advance the jobnumber for the next queued job
}
/**
Status Report Generator:
-figures out how much of the job is done, where jobnum corresponds to the job number
-removes finished jobs
@param blendjobs_head a pointer to a pointer because the head of the blendjobs linked list may need to be changed by blendjob_remove
*/
void status_report_generator(struct blendjob **blendjobs_head)
{
struct blendjob *blendjob_ptr;
unsigned short workers_working; /*< used to count the total number of workers working */
unsigned int numjobs; /*< used to track number of jobs */
blendjob_ptr = *blendjobs_head;
workers_working = 0;
numjobs = 0;
while(blendjob_ptr)
{
if(blendjob_ptr->priority != 0)
/* If the job is not done, scan it */
{
unsigned int framecounter; /*< to scan through frames */
unsigned long finished_frames; /*< variable that counts the completed frames */
unsigned int pending_frames; /*< variable that counts the assigned frames */
float percent_frames_finished; /*< variable that stores the percent done of the blendjob */
unsigned int total_time; /*< total time taken to render all the completed frames for a job */
framecounter = 0;
finished_frames = 0;
pending_frames = 0;
percent_frames_finished = 0;
total_time = 0;
while(framecounter < blendjob_ptr->total_frames)
/* scans through frames, based on their status it runs a statement(s) */
{
if(blendjob_ptr->frameset[framecounter].status == 2)
/* If the frame is done */
{
finished_frames ++;
total_time += blendjob_ptr->frameset[framecounter].time_to_render;
}
if(blendjob_ptr->frameset[framecounter].status == 1)
/* If the frame is assigned */
{
pending_frames ++;
workers_working ++;
}
framecounter ++;
} /* while(framecounter < blendjob_ptr->total_frames) */
// find the percent of completed frames
percent_frames_finished = (finished_frames / blendjob_ptr->total_frames) * 100; /*< @LordofWar: extraneous parentheses! */
/* updates values in the blendjob struct */
blendjob_ptr->completed_frames = finished_frames;
blendjob_ptr->assigned_frames = pending_frames;
blendjob_ptr->percent_done = percent_frames_finished;
blendjob_ptr->avg_render_time = (total_time / finished_frames); /*< extraneous parentheses! */
blendjob_ptr->time_remaining = (blendjob_ptr->avg_render_time * (blendjob_ptr->total_frames - finished_frames)); /*< extraneous parentheses! */
if(finished_frames == blendjob_ptr->total_frames)
/* If all frames are complete */
{
blendjob_ptr->priority = 0; /*< set priority to zero to indicate job is complete */
blendjob_remove(blendjobs_head, blendjob_ptr); /*< remove this job from the linkedlist */
general_info.total_finished_jobs++; /*< add one to the total finished jobs */
}
else if (finished_frames > blendjob_ptr->total_frames)
/* just in case ;-) */
{
fprintf(stderr, "%s:%d: finished_frames (%lu) > blendjob_ptr->total_frames (%d)",
__FILE__, __LINE__,
finished_frames,
blendjob_ptr->total_frames);
abort();
}
}
general_info.rendering_clients = workers_working; /*< should this be a +=? */
blendjob_ptr = blendjob_ptr->next; /*< This is the essence of linked lists and iterating through them */
numjobs ++;
} /* while(blendjob_ptr) */
general_info.jobs_in_queue = (highest_jobnum - general_info.total_finished_jobs); /*< extraneous parentheses! */
}
// **** Structure Builder: This function creates frame array based on the total number of frames to be rendered, which will then be parsed by function frame_farmer.
void frame_num_struct_builder(struct blendjob *job, unsigned int startframe, unsigned int numframes) {
int jobnum_new = highest_jobnum + 1; /* global vars will someday leave us */
unsigned int counter;
job->frameset = malloc(sizeof(struct frameset) * numframes);
if(!job->frameset)
fprintf(stderr, "error allocating memory");
job->total_frames = numframes; // sets the total number of frames in animation for status purposes
job->jobnum = jobnum_new;
for(counter = 0; counter < numframes; counter ++)
/* This builds the array, with the array starting at zero and the frameset.num starting at sframe */
job->frameset[counter].num = counter + startframe;
highest_jobnum++; // After it has created the job, it adds one to the highest_jobnum interger
}
/**
Frame Finder: matches your computer up with a lovely frame to render
TODO: Major issue here, the client needs to know the frame number, AND the job number!
Notice that this function starts by looking at the oldest job first
TODO: Link this up with the main() function to check if there are frames available or not and provide jobnum/framenum to the client
@return 0 success, other: error
*/
int frame_finder(struct blendjob *head, struct blendjob **job, struct frameset **frame)
{
int your_frame; // your_frame is an integer value that will be given to the client as the frame number to render
// UNUSED: int your_job; // @TODO: Fixme: do we need this var? you_job is an integer value that must ALSO be given to the client
unsigned short int found;
unsigned short int priority;
struct blendjob *blendjob_ptr;
found = 0;
while(!found)
{
/* enumerate through priority levels */
for(priority = 10;
priority > 0
&& !found;
priority --)
/* Find the job with the highest priority */
for(blendjob_ptr = head;
blendjob_ptr != NULL
&& !found;
blendjob_ptr = blendjob_ptr->next)
if(blendjob_ptr->priority == priority)
found = 1;
if(!found)
{
fprintf(stderr, "out of jobs to render\n");
return 1;
}
found = 0;
for(your_frame = 0;
your_frame < blendjob_ptr->total_frames;
your_frame ++)
if(blendjob_ptr->frameset[your_frame].status == 0)
found = 1;
if(!found)
{
/* there are no frames left in this job */
blendjob_ptr->priority --;
/* If that job had no open frames for some reason, run the status report generator so that */
status_report_generator(&head);
/* should the job be removed now? */
fprintf(stderr, "Job %d is finished, this is probably the place to call the job-removal function\n", blendjob_ptr->jobnum);
}
} /* while(!found) */
fprintf(stderr, "Missing apostrophe !!!!!!!!!!!!!!\n"); abort();
/* sets the value of the frame to 1, which means its taken !!!!!! MISSSING APOSTROPHE!!!!!!! */
blendjob_ptr->frameset[your_frame].status++;
blendjob_ptr->frameset[your_frame].start_time = clock();
*job = blendjob_ptr;
*frame = &blendjob_ptr->frameset[your_frame];
return 0;
}
void blend_frame_watchdog(struct blendjob *blendjob_head)
{
unsigned short int watchdog_forgiveness; /*< seconds to wait on a frame before re-assigning it */
struct blendjob *blendjob_ptr;
unsigned int counter;
watchdog_forgiveness = 3; /*< hours of forgiveness before frame is re-assigned */
blendjob_ptr = blendjob_head;
for(blendjob_ptr = blendjob_head; blendjob_ptr; blendjob_ptr = blendjob_ptr->next)
/* iterate through jobs */
for(counter = 0; counter < blendjob_ptr->total_frames; counter ++)
/* iterate through all frames for this job*/
{
if((blendjob_ptr->frameset[counter].start_time + (watchdog_forgiveness * 3600)) < clock())
/*
If frame is not completed within the number of hours specified by watchdog_forgiveness
Then change the frame status to unassigned
*/
blendjob_ptr->frameset[counter].status = 0;
}
}
/**
Finds a blendjob struct based on the jobnum
@arg jobnum job number to search for
@return NULL on job doesn't exist
*/
struct blendjob *blendjob_get(struct blendjob *head, jobnum_t jobnum)
{
struct blendjob *blendjob_ptr;
/*
The conditions of the for loop will leave blendjob_ptr at NULL if the end of the list is reached. It will leave it pointing to the correct job if it is found.
*/
for(blendjob_ptr = head;
blendjob_ptr
&& blendjob_ptr->jobnum != jobnum;
blendjob_ptr = blendjob_ptr->next);
return blendjob_ptr;
}
/**
Removes a blendjob from the blendjob linkelist.
@arg head a double pointer. the head pointer will have to be changed if blendjob == *head. Thus, make sure that the pointer points to the pointer to the head that all functions use. (I'm going to come back to this and misunderstand myself ;-))
*/
void blendjob_remove(struct blendjob **head, struct blendjob *bj)
{
struct blendjob *previous_blendjob;
if(bj == *head)
*head = bj->next;
else
{
for(previous_blendjob = *head;
previous_blendjob
&& previous_blendjob->next != bj; /*< stop on the blendjob that comes before bj */
previous_blendjob = previous_blendjob->next)
/* all of the action is in the definition of the for loop itself */;
/*
This removes references to bj from the linked list. I.E., we now skip bj when iterating through the list
*/
previous_blendjob->next = bj->next;
}
/*
@lordofwar: the magic deallocation of memory ;-)
*/
free(bj);
}
/* ************************** Main ************************* */
// Begin non-working framework?
int distrend_do_config(int argc, char *argv[], struct distrend_config **config)
{
cfg_opt_t myopts_listen[] =
{
CFG_SIMPLE_STR("type", NULL),
CFG_SIMPLE_STR("path", NULL),
CFG_SIMPLE_INT("port", NULL),
CFG_END()
};
cfg_opt_t myopts[] =
{
CFG_SEC("listen", /* this must be imported into struct listens (which must still be declared) */
myopts_listen,
CFGF_MULTI),
CFG_SIMPLE_STR("datadir", NULL),
CFG_END()
};
fprintf(stderr, "%s:%d running config\n", __FILE__, __LINE__);
*config = malloc(sizeof(struct distrend_config));
myopts[1].simple_value = &(*config)->datadir;
options_init(argc, argv, &(*config)->mycfg, myopts, "server", &(*config)->options);
fprintf(stderr, "using %s as datadir\n", (*config)->datadir);
return 0;
}
int distrend_config_free(struct distrend_config *config)
{
options_free(config->options);
free(config);
return 0;
}
// End non-working framework?
int main(int argc, char *argv[])
{
/* @TODO: Put some arg-grabbing code here */
struct blendjob *head;
int cont;
struct distrend_listenset *listenset;
struct distrend_config *config;
start_data(); // Starts fresh or loads data from xml dump
enum clientstatus
{
CLIENTSTATUS_UNINITIALIZED = 0,
CLIENTSTATUS_BUSY = 1,
CLIENTSTATUS_IDLE = 2
} clientstatus;
head = NULL;
cont = 1;
distrend_do_config(argc, argv, &config);
distrend_listen(&listenset, config);
/* This is called the ``main loop'' */
while(cont)
{
struct distren_action *action;
int clientsays; /*< temporary example variable, will be replaced when we can handle messages */
distrend_accept(&action);
cont = distrend_do(action);
/* Make the following code more event-driven */
status_report_generator(&head);
blend_frame_watchdog(head);
struct frameset *frame;
struct blendjob *job;
/* If the client is idle, must be modified for climbing through linked list of clients (client->clientnum) */
if(clientstatus == CLIENTSTATUS_IDLE)
{
int returnnum = frame_finder(head, &job, &frame); // Finds a frame to render
if(returnnum)
{
fprintf(stderr,"No frames are available to render at this time. Idling...\n");
sleep(10);
}
else
/* returnnum == 0 */
remotio_send_to_client(frame->num, job->jobnum); // Pseudo-sends data to client
}
/* If the client states that they finished the frame */
if(clientsays == DISTREN_REQUEST_DONEFRAME){
clientstatus = CLIENTSTATUS_IDLE; // Sets the client back to idle
finish_frame(head, frame->num); // @TODO: Check that finish_frame really gets the jobnum somehow
}
distrend_action_free(action);
}
distrend_unlisten(listenset);
distrend_config_free(config);
return 0;
}
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