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Stress test for gLiteCE

S.Laptev (SINP-MSU team), CERN-INTAS meeting, Dubna 26.07.2007. Stress test for gLiteCE. Stress test for gLiteCE. Submitting about 100 jobs Check results Check CPU load. Stress test for gLiteCE. Standart test from UI is not stress test, CPU load is not enough

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Stress test for gLiteCE

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  1. S.Laptev (SINP-MSU team), CERN-INTAS meeting, Dubna 26.07.2007 Stress test for gLiteCE

  2. Stress test for gLiteCE • Submitting about 100 jobs • Check results • Check CPU load

  3. Stress test for gLiteCE • Standart test from UI is not stress test, CPU load is not enough • Since glite CE is using BLAH, we can test it directly as well

  4. Stress test for gLiteCE • BLAH is Batch Local ASCII Helper • Login to gLiteCE directly and submit job interactively • Make script for stress

  5. Stress test for gLiteCE • Standart headers • #!/usr/bin/python • import os • import sys • import fcntl • import select • import time • com = os.environ['GLITE_LOCATION'] + "/bin/blahpd" • arg = len(sys.argv)‏ • if arg !=2: • print "missing namber of job" • sys.exit()‏ • arg = sys.argv[1] • try: • njob = int(arg)‏ • except ValueError: • print "njob mast be integer" • sys.exit()‏

  6. Stress test for gLiteCE Run “interactive” programm • ins, outs = os.popen2(com)‏ set NONBLOCK mode • void = fcntl.fcntl(outs, fcntl.F_SETFL, os.O_NONBLOCK)‏ Run initial BLAH “commands” • ins.write("ASYNC_MODE_ON\n")‏ • ins.write("COMMANDS\n")‏ Prepare Njob jobs, ttt.sh is simple test script • i = 1 • while i < njob+1: • jobid = i • name = 'myout' + (len(arg)-len(str(i))) * '0' + str(i)‏ • i = i+1 Submitline is BLAH “commands” to submit 1 job • submitline = "BLAH_JOB_SUBMIT "+str(jobid)+ " [cmd=\"/home/dteam001/ttt.sh\";out=\"/tmp/"+name+"\";gridtype=\"pbs\";]\n" • ins.write(submitline)‏

  7. Stress test for gLiteCE Fix time for job • start_time = time.time()‏ Blah “commands” for check results • ins.write("RESULTS\n")‏ • ins.flush()‏ • p = select.poll()‏ • p.register(outs, select.POLLIN)‏ • loop = True Waiting answer • while loop: • l = p.poll(10)‏ • if len(l)==0: continue • for (fd, event) in l: • if fd == outs.fileno() and event == select.POLLIN: • blah_out = outs.read()‏ • blah_out_lines = str.split(blah_out,"\n")‏ • else: • blah_out = 'no' • sys.exit()‏ • for blah_out in blah_out_lines: • blah_out = str.strip(blah_out)‏ • if blah_out == "R": • ins.write("RESULTS\n")‏ • ins.flush()‏ • # print "'"+blah_out+"'" • blah_out_value = str.split(blah_out)‏ • try: • job=int(blah_out_value[0])‏ • delta = time.time() - start_time • njob = njob -1 • print "JOB ",job, "is OK ", "delta time = ", delta, "

  8. Stress test for gLiteCE Finish script • BLAH_OUT:'"+blah_out+"'", "njob ", njob • except: • pass • if njob == 0: • ins.write("QUIT\n")‏ • ins.flush()‏ • print "All job is OK" • loop == False • sys.exit()‏

  9. Stress test for gLiteCE CPU load for 100 job is about 60-70%

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