opencl - How to timer the NVIDIA SDK examples? -


i tried timer oclvectoradd example. use clgetprofilinginfo, gpu timer record time spent on kernel execution. time caculated in milliseconds. output weird. code , output below:

    cl_ulong start,end; cl_event event_ker_x; cierr1 = clenqueuendrangekernel(cqcommandqueue, ckkernel, 1, null, &szglobalworksize, &szlocalworksize, 0, null, &event_ker_x); shrlog("clenqueuendrangekernel (vectoradd)...\n"); if (cierr1 != cl_success) {     shrlog("error in clenqueuendrangekernel, line %u in file %s !!!\n\n", __line__, __file__);     cleanup(argc, argv, exit_failure); } clgeteventprofilinginfo(event_ker_x, cl_profiling_command_start, sizeof(cl_ulong), &start, null); clgeteventprofilinginfo(event_ker_x, cl_profiling_command_end, sizeof(cl_ulong), &end, null); float ker_x_time= (end-start) * 1.0e-6f; shrlog("kernel execution time : %f\n", ker_x_time); clenqueuendrangekernel (vectoradd)... kernel execution time : 18446744027136.000000 clenqueuereadbuffer (dst)...

it looks have similar problem person: timed interval evaluates zero

in opencl, clenqueuendrangekernel queues kernel run doesn't execute kernel right away. profile kernel events, try checking execution time after clenqueuereadbuffer or add clfinish(..) after clenqueuendkernelrange.


Comments

Post a Comment

Popular posts from this blog

curl - PHP fsockopen help required -

i trying work on cloudflare api , have found in documentation. unfortunately have no idea how can use in fsockopen or through curl. here example of post request. need know how can make request below data post using curl or fsockopen curl https://www.cloudflare.com/api_json.html -d 'a=cache_lvl' \ -d 'tkn=8afbe6dea02407989af4dd4c97bb6e25' \ -d 'email=sample@example.com' \ -d 'z=example.com' \ -d 'v=agg' here link cloudflare https://www.cloudflare.com/docs/client-api.html#s4.2 try one: $ch = curl_init("https://www.cloudflare.com/api_json.html"); curl_setopt($ch, curlopt_returntransfer,1); curl_setopt($ch, curlopt_followlocation, 1); curl_setopt($ch, curlopt_ssl_verifypeer,false); // handling of -d curl parameter here. $param = array( 'a' => 'cache_lvl', 'tkn' => '8afbe6dea02407989af4dd4c97bb6e25', 'email' => 'sample@example.com', 'z' =...
Read more

HTTP/1.0 407 Proxy Authentication Required PHP -

i working in restricted network/limited access internet. since have use proxy make web service call. here php code calling web service , response . $client = new soapclient("http: //www.xyz.com/abc/wsdls/login.wsdl", array("trace" => 1, "exceptions" => 1, 'proxy_host' => $proxy_host, 'proxy_port' => $proxy_port, 'proxy_login' => $proxy_login, 'proxy_password' => $proxy_password)); response is fatal error: uncaught soapfault exception: [wsdl] soap-error: parsing wsdl: couldn't load ' http://www.xyz.com/abc/wsdls/login.wsdl ' : failed load external entity if copy url error message , paste in browser(with same proxy settings) works. 2nd scenario is, if pass values instead of variables giving me diffarant response $client = new soapclient("http: //www.xyz.com/abc/wsdls/login.wsdl", array("trace" => 1, "exceptions" => 1, 'proxy_host' ...
Read more

c# - Resource not found error -

i have problem accessing method on homecontroller. show code of method : [httpget] public actionresult decriptidentifiantetredirige(string login_crypter, string mdp_crypter) { string loginacrypter = _globalmanager.protegemotdepasse(login_crypter); string mdpacrypter = _globalmanager.protegemotdepasse(mdp_crypter); user userapp = new models.user(login_crypter, mdp_crypter); if (userapp.authentificationvalidee(userapp.userlogin, userapp.password)) { session["name"] = userapp.userlogin; return redirecttoaction("accueil", "home"); } else { return redirecttoaction("validerauthentification", "home"); } } then in routeconfig.cs wrote route : routes.maproute( name: "authentificationapresdecryptage", url: "{controller}/{action}/{login_crypter}/{mdp_crypter}", defaults: new...
Read more