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LTP Notes

Contents:

Here are some miscellaneous notes about LTP

See http://ltp.sourceforge.net/documentation/how-to/ltp.php

For latest results, see:

Fuego LTP execution [edit section]

Sequence of events [edit section]

Sequence of events:
  • Jenkins launches the jobs (something like bbb.default.Functional.LTP)
    • Jenkins starts fuego_test.sh
    • fuego_test.sh reads the desired spec from Functional.LTP/spec.json
      • the spec has variables which select the LTP sub-tests to run, and whether to do a buildonly or runonly of the tests
        • the test names in the spec correspond to "scenario" filenames, located in LTP's 'runtest' directory (in the case of regular tests)
  • Fuego does a build in /fuego-rw/buildzone/<test_name>-<platform>/
    • materials for the target board are put in <LTP_DIR>/target_bin
  • Fuego does a deploy
    • it installs the materials to the board
    • this is usually about 400M of binaries on the target
    • in directory $TEST_HOME
      • usually something like /home/a/fuego.Functional.LTP
  • fuego_test.sh then runs (on the target board)
    • ltp_target_run.sh
    • which runs:
      • for regular tests:
        • ltprun
          • this wrapper processes the scenario file, and strips it of any items that are mentioned in the skiplist (converting it to /tmp/<tmpdir>/alltests)
        • which runs:
          • ltp-pan
          • which runs the individual test programs that are listed in a command file
            • e.g. abort01
      • for posix tests:
        • run-posix-option-group-test.sh
      • for realtime tests:
        • test_realtime.sh

  • Fuego then fetches results from the target board
    • it collects the testlog for the test
    • it calls test_fetch_results in fuego_test.sh
      • this gathers the results from the board and puts it into a 'result' directory in the log directory for the run
  • Fuego then processes the results:
    • it calls ltp_process.py to create the results.xlxs file and/or rt.log
    • the parser.py is called to process regular test results output and create the run.json file
      • the parser also creates the files used for charting (results.json, flat_plot_data.txt, flot_chart_data.json)

defining a new spec [edit section]

Variables - the following variables can be defined for an LTP test in a test spec:
  • tests - this is a space-separated list of LTP sub-tests to execute on the board
    • tests come in 3 categories (regular, posix and realtime). The end user should not have to know about these categories, as fuego_test.sh will filter the entries in the 'tests' list into the right groups for execution on the board.
    • a full list of all available tests is in fuego_test.sh in the variable ALL_TESTS
  • phases - defines a list of test phases to execute for this spec.
    • the allowed phases are: build deploy maketar run
    • phases are space-separated
    • the default list, if none is provided, is "build deploy run"
  • extra_success_links
  • extra_fail_links

Board variables:

  • FUNCTIONAL_LTP_HOMEDIR - if specified, indicates the place where LTP system and binaries can be found (pre-installed)
    • or, where they should be placed, if deploy is specified

List of specs [edit section]

  • default
  • install - special spec, to only build and install LTP
  • make_pkg - special spec, to create a tarball that can be installed manually
  • quickhit
  • quickhitwithskips
  • smoketest
  • rtonly
  • somefail
  • selection
  • selectionwithrt
  • ptsonly
  • ltplite

  • if defined and set to true, then the build is performed and the software deployed to the target, but no run phase is executed
  • runonly - if defined and set to true, then LTP is not built, but only run on the target
  • runfolder - if specified, this specifies the location on the target where LTP has been installed.
    • currently, the deploy step does not use this - this is intended for people who manually install LTP to somewhere besides the default Fuego test directory on the target board.
  • skiplist - contains a space-separated list of individual LTP test programs that should not be executed on the target

'core' invocation lines [edit section]

Here are different invocation lines for these scripts and programs, in Fuego:

ltp_target_run.sh [edit section]

  • report 'cd /fuego-rw/tests/fuego.Functional.LTP; TESTS="quickhit "; PTSTESTS=""; RTTESTS=""; . ./ltp_target_run.sh'

ltp_target_run.sh looks for the environment variables TESTS, PTSTESTS and RTTESTS, and executes each test in each list.

  • In the TESTS list, it executes runltp for each test
    • results for each test go into $TEST_HOME/results/<test>/*.log
  • in the RTTESTS list, it executes test_realtime.sh for each
    • pts.log is generated and put into $TEST_HOME/results/pts.log
  • in the PTSTESTS list, it executes run-posix-option-group-test.sh for each test
    • log files under testcases/realtime/logs are combined into $TEST_HOME/results/rt.log

ltprun [edit section]

ltp_target_run.sh calls runltp as follows:

Note that OUTPUT_DIR is $(pwd)/result (usually $TEST_HOME/result). 

        ./runltp -C ${OUTPUT_DIR}/${i}/failed.log \
             -l ${OUTPUT_DIR}/${i}/result.log \
             -o ${OUTPUT_DIR}/${i}/output.log \
             -d ${TMP_DIR} \
             -S ./skiplist.txt \
             -f $i > ${OUTPUT_DIR}/${i}/head.log 2>&1

This says to:

  • put list of commands that failed to failed.log (-C)
  • put the machine-readable list of program executions and statuses to result.log (-l)
    • this does not have full testcase status in it, just the exit code, duration, utime, of each test program run
  • put the human-readable output to output.log (-o)
  • use $TMP_DIR for temporary data
  • use skiplist.txt to skip specific tests
    • this code is used to process the skiplist file: 
           if [ -n "${SKIPFILE}" ]; then
        for test_name in $(awk '{print $1}' "${SKIPFILE}"); do
            case "${test_name}" in \#*) continue;; esac
            sed -i "/\<${test_name}\>/c\\${test_name} exit 32;" alltests
        done
    fi
    • this has the effect of converting the command to run for the indicated testcase name to "exit 32;", which is interpreted as a (what? TSKIP?)
  • run the $i test (-f)
  • put runltp output and all errors into head.log (>, 2>&1)

ltp-pan [edit section]

From $TEST_HOME/result/quickhit/output.log (the output from runltp), here is a sample ltp-pan invocation: 

    COMMAND:    /fuego-rw/tests/fuego.Functional.LTP/bin/ltp-pan  -e -S  \
  -a 16855 -n 16855 \
  -f /fuego-rw/tests/fuego.Functional.LTP/tmp/ltp-Ua4obsCcQw/alltests \
  -l /fuego-rw/tests/fuego.Functional.LTP/result/quickhit/result.log \
  -o /fuego-rw/tests/fuego.Functional.LTP/result/quickhit/output.log \
  -C /fuego-rw/tests/fuego.Functional.LTP/result/quickhit/failed.log \
  -T /fuego-rw/tests/fuego.Functional.LTP/output/LTP_RUN_ON-output.log.tconf

LOG File: /fuego-rw/tests/fuego.Functional.LTP/result/quickhit/result.log
OUTPUT File: /fuego-rw/tests/fuego.Functional.LTP/result/quickhit/output.log
FAILED COMMAND File: /fuego-rw/tests/fuego.Functional.LTP/result/quickhit/failed.log
TCONF COMMAND File: /fuego-rw/tests/fuego.Functional.LTP/output/LTP_RUN_ON-output.log.tconf
Running tests.......
INFO: ltp-pan reported all tests PASS
LTP Version: 20170116

Let's break this out:

  • -e - exit non-zero it any command exits non-zero
  • -S - run tests sequentially (not randomly), in order found in command file
    • this implies "-s <number of commands listed in file>"
  • -a 16855 - specify an active-file of 16855
  • -n 16855 - specify a tag name of 16855
  • -f <tmp>/alltests - specify a command file of 'alltests'
  • -l - specify the result.log file (machine-readable)
  • -o - specify the output.log file (human readable test output)
  • -C - specify the failed.log file (list of failed tests)
  • -T - specify the TCONF file
    • the source says that test cases that are not fully tested will be recorded in this file

The ltp man page says the usage is: 

    ltp-pan  -n  tagname  [-SyAehp]  [-t  #s|m|h|d  time]  [-s  starts] [-x
       nactive] [-l logfile] [-a active-file]  [-f  command-file]  [-d  debug-
       level]  [-o  output-file]  [-O  buffer_directory]  [-r report_type] [-C
       fail-command-file] [cmd]

NOTES: ltp-pan can run commands multiple times, or repeat commands. Fuego calls ltp-pan with the name of a scenario file (a group of tests with their command-line arguments). The scenario file comes from the 'runtests' directory.

ltp-pan keeps a list of the tests that are currently executing in a 'zoo' file. Each line in the zoo file has: pid, tag, cmdline

ltp-pan tries very hard to clean up after misbehaved tests. When it exits, there should be no residual processes or process groups running.

output logs [edit section]

Output is placed in the following files, on target (for regular tests):
  • $TEST_HOME/output/LTP_RUN_ON-output.log.tconf
  • $TEST_HOME/result/syscalls/failed.log - list of failed tests
  • $TEST_HOME/result/syscalls/head.log - meta-data about full run
  • $TEST_HOME/result/syscalls/output.log - full test output and info
  • $TEST_HOME/result/syscalls/result.log - summary in machine-readable format

output key [edit section]

Certain keywords are used in test program output: (copied from here)
  • TPASS - Indicates that the test case had the expected result and passed
  • TFAIL - Indicates that the test case had an unexpected result and failed.
  • TBROK - Indicates that the remaining test cases are broken and will not execute correctly, because some precondition not met, such as a resource not being available.
  • TCONF - Indicates that the test case was not written to run on the current harware or software configuration such as machine type, or kernel version.
  • TRETR - Indicates that the test cases has been retired and should not be executed any longer.
  • TWARN - Indicates that the test case experienced an unexpected or undesirable event that should not affect the test itself such as being unable to cleanup resources after the test finished.
  • TINFO - Specifies useful information about the status of the test that does not affect the result and does not indicate a problem.

'posix' invocation lines [edit section]

run-posix-option-group.sh [edit section]

Is invoked with the name of the posix option group, which is one of:
  • AIO MEM MSG SEM SIG THR TMR TPS

actual sub-tests are in $FUNCTIONAL_LTP_HOMEDIR/conformance/interfaces with a directory for each test sub-group.

run-posix-option-group.sh knows which test directories belong to which POSIX group, and runs the ones requested. Each test directory is passed into run_option_group_test().

The function run_option_group_tests() inside this script, appears to only process the first argument passed in.

Each directory has a run.sh file (there are 208 of them).

run.sh [edit section]

Each run script executes run-tests.sh with a list of specific tests in the current directory. The tests may be compiled programs or shell scripts. run.sh is executed with no arguments.

run-tests.sh [edit section]

Takes a list of tests, and does the following:

It uses $LOGFILE as the output log for an individual test (this is the stdout of the individual test program). If $LOGFILE is not defined, it uses "logfile" (in the current directory).

It uses $TIMEOUT_VAL as the timeout for an individual test. If not defined, a TIMEOUT_VAL of 300 seconds is used.

It uses the program $FUNCTIONAL_LTP_HOMEDIR/bin/t0 to run tests with a timeout. This program uses t0.val to indicate the return code for a test that timed out.

TIMEOUT_RET is the return code of t0 when a program timed out (that is, it overran it's timeout).

If there is a file named ${testname}.args, then the contents of that file are used as arguments to the program at runtime.

If there is a file named test_defs, then that file is sourced before the tests are run.

It outputs on standard out the counts of PASS/FAIL and total tests executed.

It's exit code is the number of tests that failed. So, 0 = all passed.

posix conformance interface sub-directories [edit section]

posix group  ^ sub-group  ^
AIO aio_* (including aio_cancel, aio_error, aio_fsync, aio_read, aio_return, aio_suspend, aio_write)
AIO lio_listio
SIG sig* (including sigaction, sigemptyset, sigismember, sigprocmask, sigsuspend, sigaddset, sigfillset, signal, sigqueue, sigtimedwait, sigaltstack, sighols, sigpause, sigrelse, sigwait, sigdelset, sigignore, sigpending, sigset, sigwaitinfo)
SIG raise
SIG kill
SIG killpg
SIG pthread_kill
SIG pthread_sigmask
SEM sem* (including sem_close, sem_getvalue, sem_open, sem_timedwait, sem_wait, sem_destroy, sem_init, sem_post, sem_unlink)
THR pthread_* (including 95 tests - too many to list)
TMR time* (including time, timer_create, timer_delete, timer_getoverrun, timer_gettime, timer_settime))
TMR *time (including asctime, clock_gettime, clock_settime, ctime, difftime, gmtime, localtime, mktime, strftime, time, timer_gettime, timer_settime)
TMR clock* (including clock clock_getcpuclockid clock_getres clock_gettime clock_nanosleep clock_settime)
TMR nanosleep
MSG mq_* (including mq_close mq_getattr mq_notify mq_open mq_receive mq_send mq_setattr mq_timedreceive mq_timedsend mq_unlink)
TPS *sched* (including a bunch of test dirs)
MEM m*lock
MEM m*map
MEM shm_*
Query

FIXTHIS - when running with an existing LTP, we don't erase the pts.log file, or any of the existing logfiles.

FIXTHIS - it appears that we only run the first item in a wildcard list of items (but the data for multiple aio_* dirs is there, so I'm not reading something right)

FIXTHIS - it appears that we don't run the posix behavior tests

FIXTHIS - it appears that we don't run the posix definition tests

FIXTHIS - it appears we don't run the posix functional tests

FIXTHIS - it appears we don't run the posix stress tests

posix parsing [edit section]

See LTP posix parsing notes

LTP status [edit section]

in Tim's lab on August 3, 2017 [edit section]

How long to execute:

  • bbb.default.Functional.LTP it hangs in inotify06
    • some long tests:
      • fsync02
      • fork13
  • min1.default.Functional.LTP - 45 minutes with build
  • docker.docker.Functional.LTP - 22 minutes (not sure if it includes the build)

how to find the long-running tests [edit section]

  • use: sed s/dur=// result.log | sort -k3 -n

board  ^ test  ^ duration  ^ user  ^ system  ^ test date  ^
bbb creat06 30 5 21 2017-08-03
bbb gettimeofday02 30 647 2324 2017-08-03
bbb ftruncate04_64 31 5 22 2017-08-03
bbb chown04 32 6 23 2017-08-03
bbb fchown04_16 32 3 14 2017-08-03
bbb fchown04 32 2 12 2017-08-03
bbb access04 33 5 26 2017-08-03
bbb ftruncate04 33 5 23 2017-08-03
bbb fchmod06 34 5 20 2017-08-03
bbb chown04_16 35 4 25 2017-08-03
bbb chmod06 36 4 21 2017-08-03
bbb acct01 37 4 29 2017-08-03
bbb clock_nanosleep2_01 51 2 1 2017-08-03
bbb fsync02 292 1 42 2017-08-03
bbb fork13 806 946 24970 2017-08-03
Query

inotify06 oops [edit section]

inotify06 causes the kernel to oops, with the following report: 
    [57540.087504] Kernel panic - not syncing: softlockup: hung tasks
[57540.093608] [<c00111f1>] (unwind_backtrace+0x1/0x9c) from [<c04c8955>] (panic+0x59/0x158)
[57540.102136] [<c04c8955>] (panic+0x59/0x158) from [<c00726d9>] (watchdog_timer_fn+0xe5/0xfc)
[57540.110862] [<c00726d9>] (watchdog_timer_fn+0xe5/0xfc) from [<c0047b4b>] (__run_hrtimer+0x4b/0x154)
[57540.120307] [<c0047b4b>] (__run_hrtimer+0x4b/0x154) from [<c00483f7>] (hrtimer_interrupt+0xcf/0x1fc)
[57540.129842] [<c00483f7>] (hrtimer_interrupt+0xcf/0x1fc) from [<c001e98b>] (omap2_gp_timer_interrupt+0x1f/0x24)
[57540.140275] [<c001e98b>] (omap2_gp_timer_interrupt+0x1f/0x24) from [<c0072dd3>] (handle_irq_event_percpu+0x3b/0x188)
[57540.151246] [<c0072dd3>] (handle_irq_event_percpu+0x3b/0x188) from [<c0072f49>] (handle_irq_event+0x29/0x3c)
[57540.161505] [<c0072f49>] (handle_irq_event+0x29/0x3c) from [<c007489b>] (handle_level_irq+0x53/0x8c)
[57540.171026] [<c007489b>] (handle_level_irq+0x53/0x8c) from [<c00729ff>] (generic_handle_irq+0x13/0x1c)
[57540.180728] [<c00729ff>] (generic_handle_irq+0x13/0x1c) from [<c000d0df>] (handle_IRQ+0x23/0x60)
[57540.189902] [<c000d0df>] (handle_IRQ+0x23/0x60) from [<c00085a9>] (omap3_intc_handle_irq+0x51/0x5c)
[57540.199339] [<c00085a9>] (omap3_intc_handle_irq+0x51/0x5c) from [<c04cea9b>] (__irq_svc+0x3b/0x5c)
[57540.208679] Exception stack(0xcb7e5e98 to 0xcb7e5ee0)
[57540.213943] 5e80:                                                       de03ef54 df34f180
[57540.222478] 5ea0: 68836882 00000000 de03ef54 cb7e4000 de03ef54 ffffffff df34f180 df34f1dc
[57540.231008] 5ec0: 00000010 df016450 cb7e5ee8 cb7e5ee0 c00e2e33 c025eb88 60000033 ffffffff
[57540.239544] [<c04cea9b>] (__irq_svc+0x3b/0x5c) from [<c025eb88>] (do_raw_spin_lock+0xa4/0x114)
[57540.248534] [<c025eb88>] (do_raw_spin_lock+0xa4/0x114) from [<c00e2e33>] (fsnotify_destroy_mark_locked+0x17/0xec)
[57540.259240] [<c00e2e33>] (fsnotify_destroy_mark_locked+0x17/0xec) from [<c00e316b>] (fsnotify_clear_marks_by_group_flags+0x5
7/0x74)
[57540.271577] [<c00e316b>] (fsnotify_clear_marks_by_group_flags+0x57/0x74) from [<c00e2869>] (fsnotify_destroy_group+0x9/0x24)
[57540.283284] [<c00e2869>] (fsnotify_destroy_group+0x9/0x24) from [<c00e3c91>] (inotify_release+0x1d/0x20)
[57540.293182] [<c00e3c91>] (inotify_release+0x1d/0x20) from [<c00bbb69>] (__fput+0x65/0x16c)
[57540.301808] [<c00bbb69>] (__fput+0x65/0x16c) from [<c004323d>] (task_work_run+0x6d/0xa4)
[57540.310238] [<c004323d>] (task_work_run+0x6d/0xa4) from [<c000f3eb>] (do_work_pending+0x6f/0x70)
[57540.319402] [<c000f3eb>] (do_work_pending+0x6f/0x70) from [<c000c893>] (work_pending+0x9/0x1a)
[57540.328394] drm_kms_helper: panic occurred, switching back to text console
[57572.431529] CAUTION: musb: Babble Interrupt Occurred
[57572.503646] CAUTION: musb: Babble Interrupt Occurred
[57572.590984]  gadget: high-speed config #1: Multifunction with RNDIS
[57577.609329] CAUTION: musb: Babble Interrupt Occurred
[57577.683922] CAUTION: musb: Babble Interrupt Occurred
[57577.772461]  gadget: high-speed config #1: Multifunction with RNDIS

    [ 3592.037885] BUG: soft lockup - CPU#0 stuck for 23s! [inotify06:1994]
[ 3592.045691] BUG: scheduling while atomic: inotify06/1994/0x40010000
[ 3592.069728] Kernel panic - not syncing: softlockup: hung tasks
[ 3592.076169] [<c00111f1>] (unwind_backtrace+0x1/0x9c) from [<c04c8955>] (panic+0x59/0x158)
[ 3592.085129] [<c04c8955>] (panic+0x59/0x158) from [<c00726d9>] (watchdog_timer_fn+0xe5/0xfc)
[ 3592.094308] [<c00726d9>] (watchdog_timer_fn+0xe5/0xfc) from [<c0047b4b>] (__run_hrtimer+0x4b/0x154)
[ 3592.104241] [<c0047b4b>] (__run_hrtimer+0x4b/0x154) from [<c00483f7>] (hrtimer_interrupt+0xcf/0x1fc)
[ 3592.114276] [<c00483f7>] (hrtimer_interrupt+0xcf/0x1fc) from [<c001e98b>] (omap2_gp_timer_interrupt+0x1f/0x24)
[ 3592.125246] [<c001e98b>] (omap2_gp_timer_interrupt+0x1f/0x24) from [<c0072dd3>] (handle_irq_event_percpu+0x3b/0x188)
[ 3592.136766] [<c0072dd3>] (handle_irq_event_percpu+0x3b/0x188) from [<c0072f49>] (handle_irq_event+0x29/0x3c)
[ 3592.147522] [<c0072f49>] (handle_irq_event+0x29/0x3c) from [<c007489b>] (handle_level_irq+0x53/0x8c)
[ 3592.157518] [<c007489b>] (handle_level_irq+0x53/0x8c) from [<c00729ff>] (generic_handle_irq+0x13/0x1c)
[ 3592.167710] [<c00729ff>] (generic_handle_irq+0x13/0x1c) from [<c000d0df>] (handle_IRQ+0x23/0x60)
[ 3592.177328] [<c000d0df>] (handle_IRQ+0x23/0x60) from [<c00085a9>] (omap3_intc_handle_irq+0x51/0x5c)
[ 3592.187235] [<c00085a9>] (omap3_intc_handle_irq+0x51/0x5c) from [<c04cea9b>] (__irq_svc+0x3b/0x5c)
[ 3592.197024] Exception stack(0xdf74dec8 to 0xdf74df10)
[ 3592.202568] dec0:                   de7f1e50 de3786c0 00000000 de7f1e54 de7f1e50 de7f1e50
[ 3592.211507] dee0: de378748 ffffffff de3786c0 de37871c 00000010 df016450 df74dee8 df74df10
[ 3592.220470] df00: c00e3171 c00e2d16 80000033 ffffffff
[ 3592.226025] [<c04cea9b>] (__irq_svc+0x3b/0x5c) from [<c00e2d16>] (fsnotify_put_mark+0xa/0x34)
[ 3592.235380] [<c00e2d16>] (fsnotify_put_mark+0xa/0x34) from [<c00e3171>] (fsnotify_clear_marks_by_group_flags+0x5d/0x74)
[ 3592.247195] [<c00e3171>] (fsnotify_clear_marks_by_group_flags+0x5d/0x74) from [<c00e2869>] (fsnotify_destroy_group+0x9/0x24)
[ 3592.259493] [<c00e2869>] (fsnotify_destroy_group+0x9/0x24) from [<c00e3c91>] (inotify_release+0x1d/0x20)
[ 3592.269880] [<c00e3c91>] (inotify_release+0x1d/0x20) from [<c00bbb69>] (__fput+0x65/0x16c)
[ 3592.278939] [<c00bbb69>] (__fput+0x65/0x16c) from [<c004323d>] (task_work_run+0x6d/0xa4)
[ 3592.287811] [<c004323d>] (task_work_run+0x6d/0xa4) from [<c000f3eb>] (do_work_pending+0x6f/0x70)
[ 3592.297458] [<c000f3eb>] (do_work_pending+0x6f/0x70) from [<c000c893>] (work_pending+0x9/0x1a)
[ 3592.306894] drm_kms_helper: panic occurred, switching back to text console
[ 3624.208005] CAUTION: musb: Babble Interrupt Occurred
[ 3624.280120] CAUTION: musb: Babble Interrupt Occurred
[ 3624.367738]  gadget: high-speed config #1: Multifunction with RNDIS
[ 3629.389807] CAUTION: musb: Babble Interrupt Occurred
[ 3629.464524] CAUTION: musb: Babble Interrupt Occurred
[ 3629.552870]  gadget: high-speed config #1: Multifunction with RNDIS

Examples of LTP analysis [edit section]

ARC LTP instructions [edit section]

See https://github.com/foss-for-synopsys-dwc-arc-processors/ltp/blob/master/README.ARC

It lists things like:

  • tests that don't build with the ARC toolchain
  • tests that use BSD signal calls, which are not configured for ARC by default
  • tests that require different default parameters because they take too much time on an embedded system
  • tests that hang the system
  • tests that are not applicable to ARC, but fail, so should be disabled

It has a section of notes indicating requirements for the tests, including:

  • tests that require a loopback device
  • kernel config options (that enable a loopback device)
  • binaries required (util-linux, e2fsprogs, bash)
    • the buildroot config options to enable those binaries

Examples of LTP visualization [edit section]

Linaro [edit section]

Linaro has some nice color-coded tables with LTP results: http://www.lineo.co.jp/ltp/linux-3.10.10-results/result.html

Bugs or issues [edit section]

  • rmdir05 - has some tests that are not implemented for Linux (TCONF)
  • f00f - only applies to i386 (TCONF)
  • select01,2,3,4 - on bbb, expects a different C library than is present
    • expects GLIBC_2.15 but bbb has GLIBC_2.13
  • access02, access04 - requires root

Questions [edit section]

  • Q: Where do parameters for test command line come from?
    • A: LTP docs say it comes from the runtest directory (see runtest/syscalls)
      • runtest/syscalls fork13 entry has: "fork13 fork13 -i 1000000" (which is too long on bbb)
    • A: target_run_ltp runs runltp which runs ltp-pan with the name of the "scenario" file - which provide similar functionality to Fuego's testplan files. The scenario files are found in the 'runtest' directory, and specify a 'tag', and a string of items to pass to a shell invocation.
      • (usually this is the command program name and the arguments, but it can include multiple commands.)

Environment variables used by runltp, ltp-pan, and tests [edit section]

Here is a list of environment variables that runltp exports:
  • LTPROOT
  • TMPBASE
  • LTP_DEV_FS_TYPE
  • INJECT_FAULT_LOOPS_PER_TEST
  • INJECT_KERNEL_FAULT_PERCENTAGE
  • TMPTEMPLATE
  • TMP
  • TMPDIR
  • RHOST
  • PASSWD
  • LTP_BIG_DEV
  • LTP_BIG_DEV_FS_TYPE
  • LTP_DEV
  • LTP_EXIT_VALUE
  • TEST_START_TIME
  • TEST_END_TIME
  • TEST_OUTPUT_DIRECTORY
  • TEST_LOGS_DIRECTORY

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