[f8a53f]: testsuite / cycle-check-ocount / ocount-cycle-check-run.exp Maximize Restore History

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ocount-cycle-check-run.exp    96 lines (73 with data), 3.0 kB

# ocount-cycle-check-run.exp
#   Copyright (C) 2013 IBM
#
#   author:  Carl Love <carll@us.ibm.com>
#
# This file is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#

load_lib "ocount_util.exp"

proc do_test_ocount_cycle_test {workload_exec output_format} {

    # Get processor frequency in Hz
    set freq  [get_cpu_frequency]

    # Check that counting cycles for "interval" seconds is equal to the
    # processor frequency.  Note, we run this with a workload so we don't have
    # issues with partitioned machines ceeding the processor because it is
    # idle.

    set event [get_cycles_event]
    set interval 1

    set pid [exec $workload_exec  > /tmp/junky.xwyesu.xse &]

    # allow workload to reach steady state
    local_exec "sleep 1" "" "" 10

    set result [local_exec "ocount $output_format -e $event --time-interval $interval:1 -p $pid " "" "" 60]

    test_kill_workload $pid

    if {[string match $output_format "--brief-format"]} {
        set count [get_event_count_brief $result $event]
    } else {
        set count [get_event_count $result $event]
    }

    local_exec "rm /tmp/junky.xwyesu.xse" "" "" 10
    set test "Count cycles matches CPU frequency"

    # check the count is not zero
    if {[check_nonzero_count $count $workload_exec $event] == 0} {
        return
    }

    # The frequency is specified in units of Hz
    set expt_count [expr $interval * $freq]

    # Count of cycles and frequency should be within the following percentage
    set percent 5

    if {[check_expected_value $count $expt_count $percent] == 1} {
        pass $test
    } else {
        fail $test
        send "CPU freq $freq Hz, collection interval $interval. \n"
        send "Expected count $expt_count, actual count $count. \n"
        send "See the README for an explanation about why the \n"
        send "ocount-cycle-check test may have failed. \n\n"
    }
}

proc cycle_run_tests {} {

    set workload_exec [compile_ocount_workload "workload_ocount/load.c"]

    # Check the brief format counting cycles versus CPU frequency
    do_test_ocount_cycle_test $workload_exec "--brief-format"

    # Check the cycles count versus CPU frequency
    do_test_ocount_cycle_test $workload_exec ""
}


#main
ocount_get_version

if { $ocount_version == 0 } {
    send "\nThe OProfile ocount user tool is not supported.  Will not run ocount tests.\n"
} else {
    cycle_run_tests
}