haraldwolff/qemu-patch-raspberry4
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Wiki Activity
qemu-patch-raspberry4/tests
History
Markus Armbruster f917eed306 qobject: Fix qnum_to_string() to use sufficient precision 
We should serialize numbers to JSON so that they deserialize back to
the same number.  We fail to do so.

The culprit is qnum_to_string(): it uses format %f with trailing '0'
trimmed.  Results in pretty output for "nice" numbers, but is prone to
nasty rounding errors.  For instance, numbers between 0 and 0.0000005
get flushed to zero.

Where exactly the incorrect rounding can bite is tiresome to gauge.
Here's my take.

* In QMP output, type 'number':

  - query-blockstats value avg_rd_queue_depth

  - QMP query-migrate values mbps, cache-miss-rate, encoding-rate,
    busy-rate, compression-rate.

  Relatively harmless, I guess.

* In tracing QMP input.  Harmless.

* In qemu-ga output, type 'number': guest-get-users value login-time.
  Harmless.

* In output of HMP qom-get.  Harmless.

Not affected, because double values don't actually occur there (I
think):

* QMP output, type 'any':

  * qom-get value

  * qom-list, qom-list-properties value default-value

  * query-cpu-model-comparison, query-cpu-model-baseline,
    query-cpu-model-expansion value props.

* qemu-img --output json output.

* "json:" pseudo-filenames generated by bdrv_refresh_filename().

* The rbd block driver's "=keyvalue-pairs" hack.

* In -object help on property default values.  Aside: use of JSON
  feels inappropriate here.

* Output of HMP qom-get.

* Argument conversion to QemuOpts for qdev_device_add() and HMP with
  qemu_opts_from_qdict()

  QMP and HMP device_add, virtio-net failover primary creation,
  xen-usb "usb-host" creation, HMP netdev_add, object_add.

* The uses of qobject_input_visitor_new_flat_confused()

  As far as I can tell, none of the visited types contain double
  values.

* Dumping ImageInfoSpecific with dump_qobject()

Fix by formatting with %.17g.  17 decimal digits always suffice for
IEEE double.

The change to expected test output illustrates the effect: the
rounding errors are gone, but some seemingly "nice" numbers now get
converted to not so nice strings, e.g. 0.42 to "0.41999999999999998".
This is because 0.42 is not representable exactly in double.  It's
more accurate in this example than strictly necessary, though.

If ugly accuracy bothers us, we can we can try using the least number
of digits that still converts back to the same double.  In this
example, "0.42" would do.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20201210161452.2813491-7-armbru@redhat.com>
2020-12-19 10:37:16 +01:00
..
acceptance tests/acceptance: test s390x zpci fid propagation 2020-12-11 11:38:10 +01:00
data tests/acpi: update expected data files 2020-12-10 08:47:44 +01:00
decode decodetree: Improve identifier matching 2020-09-14 14:23:19 +01:00
docker Remove obsolete setuptools dependency and fix Stefan's 2020-11-26 14:25:47 +00:00
fp do not use colons in test names 2020-10-22 11:53:53 -04:00
guest-debug tests/guest-debug: catch hanging guests 2020-05-15 15:25:07 +01:00
image-fuzzer image-fuzzer: Use OSerror.strerror instead of tuple subscript 2019-11-05 16:36:11 +01:00
include tests: add missing generated sources to testqapi 2020-10-17 10:45:50 -04:00
keys tests/vm: Add Haiku test based on their vagrant images 2020-11-17 09:45:24 +01:00
migration Remove the deprecated -realtime option 2020-12-15 12:52:02 -05:00
multiboot Remove superfluous .gitignore files 2020-10-13 12:48:17 +02:00
perf/block/qcow2
plugin plugin: Fixes compiling errors on msys2/mingw 2020-10-09 17:27:55 +01:00
qapi-schema meson: move SPHINX_ARGS references within "if build_docs" 2020-10-17 10:45:52 -04:00
qemu-iotests block: introduce BDRV_MAX_LENGTH 2020-12-11 17:52:40 +01:00
qtest memory: clamp cached translation in case it points to an MMIO region 2020-12-15 12:52:00 -05:00
rocker
tcg tests: remove GCC < 4 fallbacks 2020-12-15 12:52:10 -05:00
tsan tests/docker: Added docker build support for TSan. 2020-06-16 14:49:05 +01:00
uefi-test-tools Remove superfluous .gitignore files 2020-10-13 12:48:17 +02:00
vm tests/docker, tests/vm: remove setuptools from images 2020-11-25 12:50:48 -05:00
vmstate-static-checker-data
atomic64-bench.c qemu/atomic.h: rename atomic_ to qatomic_ 2020-09-23 16:07:44 +01:00
atomic_add-bench.c qemu/atomic.h: rename atomic_ to qatomic_ 2020-09-23 16:07:44 +01:00
benchmark-crypto-cipher.c tests: fix output message formatting for crypto benchmarks 2020-09-10 11:02:17 +01:00
benchmark-crypto-hash.c tests: fix output message formatting for crypto benchmarks 2020-09-10 11:02:17 +01:00
benchmark-crypto-hmac.c tests: fix output message formatting for crypto benchmarks 2020-09-10 11:02:17 +01:00
check-block-qdict.c tests: Use error_free_or_abort() where appropriate 2020-07-02 06:25:28 +02:00
check-block.sh tests/check-block: Do not run the iotests with old versions of bash 2020-10-02 15:46:40 +02:00
check-qdict.c
check-qjson.c qobject: Fix qnum_to_string() to use sufficient precision 2020-12-19 10:37:16 +01:00
check-qlist.c qobject: Eliminate qlist_iter(), use QLIST_FOREACH_ENTRY() instead 2020-04-30 06:51:15 +02:00
check-qlit.c
check-qnull.c
check-qnum.c qobject: Fix qnum_to_string() to use sufficient precision 2020-12-19 10:37:16 +01:00
check-qobject.c tests: Use &error_abort where appropriate 2020-07-02 06:25:28 +02:00
check-qom-interface.c Use DECLARE_*CHECKER* macros 2020-09-09 09:27:09 -04:00
check-qom-proplist.c qom: Clean up object_property_get_enum()'s error value 2020-09-18 13:49:48 -04:00
check-qstring.c
crypto-tls-psk-helpers.c
crypto-tls-psk-helpers.h
crypto-tls-x509-helpers.c crypto: use a stronger private key for tests 2020-07-17 14:20:57 +02:00
crypto-tls-x509-helpers.h
dbus-vmstate-daemon.sh tests: add dbus-vmstate-test 2020-01-06 18:41:32 +04:00
io-channel-helpers.c test: Fix LGPL information in the file headers 2020-11-15 17:04:40 +01:00
io-channel-helpers.h test: Fix LGPL information in the file headers 2020-11-15 17:04:40 +01:00
iothread.c qemu/atomic.h: rename atomic_ to qatomic_ 2020-09-23 16:07:44 +01:00
iothread.h
Makefile.include build: replace ninjatool with ninja 2020-10-17 10:45:51 -04:00
meson.build libvhost-user: make it a meson subproject 2020-12-08 13:48:58 -05:00
pkix_asn1_tab.c
ptimer-test-stubs.c replay: do not build if TCG is not available 2020-10-22 11:53:54 -04:00
ptimer-test.c tests/ptimer: Remove unnecessary inclusion of libqtest.h 2020-01-12 11:42:40 +01:00
ptimer-test.h
qht-bench.c qemu/atomic.h: rename atomic_ to qatomic_ 2020-09-23 16:07:44 +01:00
rcutorture.c qemu/atomic.h: rename atomic_ to qatomic_ 2020-09-23 16:07:44 +01:00
requirements.txt Acceptance tests: bump pycdlib version for easier installation 2020-10-13 08:08:55 +02:00
socket-helpers.c tests/socket-helpers: Treat EAI_NONAME as EADDRNOTAVAIL 2020-09-16 08:41:06 +02:00
socket-helpers.h tests: specify the address family when checking bind 2019-08-22 17:30:25 +04:00
test-aio-multithread.c qemu/atomic.h: rename atomic_ to qatomic_ 2020-09-23 16:07:44 +01:00
test-aio.c util/async: make bh_aio_poll() O(1) 2020-02-22 08:26:47 +00:00
test-authz-list.c authz: Fix Lesser GPL version number 2020-10-29 09:57:37 +00:00
test-authz-listfile.c authz: Fix Lesser GPL version number 2020-10-29 09:57:37 +00:00
test-authz-pam.c authz: Fix Lesser GPL version number 2020-10-29 09:57:37 +00:00
test-authz-simple.c authz: Fix Lesser GPL version number 2020-10-29 09:57:37 +00:00
test-base64.c test: Fix LGPL information in the file headers 2020-11-15 17:04:40 +01:00
test-bdrv-drain.c block: End quiescent sections when a BDS is deleted 2020-10-27 15:26:20 +01:00
test-bdrv-graph-mod.c tests: Use error_free_or_abort() where appropriate 2020-07-02 06:25:28 +02:00
test-bitcnt.c
test-bitmap.c mingw: fix error __USE_MINGW_ANSI_STDIO redefined 2020-10-13 13:33:46 +02:00
test-bitops.c
test-block-backend.c
test-block-iothread.c tests: Use error_free_or_abort() where appropriate 2020-07-02 06:25:28 +02:00
test-blockjob-txn.c job: drop job_drain 2019-09-10 08:58:43 +02:00
test-blockjob.c job: take each job's lock individually in job_txn_apply 2020-04-07 14:34:47 +02:00
test-bufferiszero.c test: Fix LGPL information in the file headers 2020-11-15 17:04:40 +01:00
test-char.c treewide: do not use short-form boolean options 2020-12-10 12:15:11 -05:00
test-clone-visitor.c qapi: Use QAPI_LIST_PREPEND() where possible 2020-12-19 10:20:14 +01:00
test-coroutine.c
test-crypto-afsplit.c crypt: Fix Lesser GPL version number 2020-10-29 09:57:37 +00:00
test-crypto-block.c crypt: Fix Lesser GPL version number 2020-10-29 09:57:37 +00:00
test-crypto-cipher.c crypt: Fix Lesser GPL version number 2020-10-29 09:57:37 +00:00
test-crypto-hash.c crypt: Fix Lesser GPL version number 2020-10-29 09:57:37 +00:00
test-crypto-hmac.c
test-crypto-ivgen.c crypt: Fix Lesser GPL version number 2020-10-29 09:57:37 +00:00
test-crypto-pbkdf.c test: Fix LGPL information in the file headers 2020-11-15 17:04:40 +01:00
test-crypto-secret.c crypt: Fix Lesser GPL version number 2020-10-29 09:57:37 +00:00
test-crypto-tlscredsx509.c glib: use portable g_setenv() 2019-12-17 09:05:23 +01:00
test-crypto-tlssession.c glib: use portable g_setenv() 2019-12-17 09:05:23 +01:00
test-crypto-xts.c crypt: Fix Lesser GPL version number 2020-10-29 09:57:37 +00:00
test-cutils.c
test-fdmon-epoll.c tests: add test-fdmon-epoll 2020-09-23 13:45:52 +01:00
test-hbitmap.c block/dirty-bitmap: improve _next_dirty_area API 2020-03-18 14:03:46 -04:00
test-image-locking.c
test-int128.c
test-io-channel-buffer.c io: Fix Lesser GPL version number 2020-10-29 09:57:37 +00:00
test-io-channel-command.c io: Fix Lesser GPL version number 2020-10-29 09:57:37 +00:00
test-io-channel-file.c io: Fix Lesser GPL version number 2020-10-29 09:57:37 +00:00
test-io-channel-socket.c io: Fix Lesser GPL version number 2020-10-29 09:57:37 +00:00
test-io-channel-tls.c glib: use portable g_setenv() 2019-12-17 09:05:23 +01:00
test-io-task.c io: Fix Lesser GPL version number 2020-10-29 09:57:37 +00:00
test-iov.c util/iov: add iov_discard_undo() 2020-09-23 13:41:58 +01:00
test-keyval.c keyval: Parse help options 2020-10-15 16:06:27 +02:00
test-logging.c qemu/atomic.h: rename atomic_ to qatomic_ 2020-09-23 16:07:44 +01:00
test-mul64.c
test-opts-visitor.c
test-qapi-util.c
test-qdev-global-props.c tests: Fixes test-qdev-global-props.c 2020-09-16 12:15:07 +02:00
test-qdist.c
test-qemu-opts.c qemu-option: restrict qemu_opts_set to merge-lists QemuOpts 2020-12-10 12:15:12 -05:00
test-qga.c test-qga: fix a resource leak in test_qga_guest_get_osinfo() 2020-12-09 08:04:34 +01:00
test-qgraph.c test: Fix LGPL information in the file headers 2020-11-15 17:04:40 +01:00
test-qht-par.c
test-qht.c
test-qmp-cmds.c qapi: Add a 'coroutine' flag for commands 2020-10-09 07:08:19 +02:00
test-qmp-event.c tests/test-qmp-event: Check event is actually emitted 2020-03-17 19:58:34 +01:00
test-qobject-input-visitor.c qapi: enable use of g_autoptr with QAPI types 2020-09-03 09:38:36 +02:00
test-qobject-output-visitor.c qapi: Use QAPI_LIST_PREPEND() where possible 2020-12-19 10:20:14 +01:00
test-rcu-list.c qemu/atomic.h: rename atomic_ to qatomic_ 2020-09-23 16:07:44 +01:00
test-rcu-simpleq.c
test-rcu-slist.c rcu_queue: add QSLIST functions 2020-02-22 08:26:47 +00:00
test-rcu-tailq.c
test-replication.c tests: test-replication disable /replication/secondary/* on msys2/mingw. 2020-09-16 08:41:06 +02:00
test-shift128.c
test-string-input-visitor.c tests: Use &error_abort where appropriate 2020-07-02 06:25:28 +02:00
test-string-output-visitor.c tests: Use &error_abort where appropriate 2020-07-02 06:25:28 +02:00
test-thread-pool.c qemu/atomic.h: rename atomic_ to qatomic_ 2020-09-23 16:07:44 +01:00
test-throttle.c test-throttle: Fix uninitialized use of burst_length 2019-08-20 17:26:19 +02:00
test-timed-average.c cpu-timers, icount: new modules 2020-10-05 16:41:22 +02:00
test-util-filemonitor.c tests: Fixes building test-util-filemonitor.c on msys2/mingw 2020-09-07 12:34:17 +02:00
test-util-sockets.c sockets: Make abstract UnixSocketAddress depend on CONFIG_LINUX 2020-11-03 13:17:25 +00:00
test-uuid.c test: Fix LGPL information in the file headers 2020-11-15 17:04:40 +01:00
test-visitor-serialization.c qapi: Use QAPI_LIST_PREPEND() where possible 2020-12-19 10:20:14 +01:00
test-vmstate.c vmstate: Fixes test-vmstate.c on msys2/mingw 2020-09-16 08:41:06 +02:00
test-write-threshold.c block: introduce BDRV_MAX_LENGTH 2020-12-11 17:52:40 +01:00
test-x86-cpuid.c Revert "hw/i386: Update structures to save the number of nodes per package" 2020-09-02 07:29:26 -04:00
test-xbzrle.c
vhost-user-bridge.c libvhost-user: make it a meson subproject 2020-12-08 13:48:58 -05:00