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8c6b0356b5
qemu/tests
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Stefan Hajnoczi 8c6b0356b5 util/async: make bh_aio_poll() O(1) 
The ctx->first_bh list contains all created BHs, including those that
are not scheduled.  The list is iterated by the event loop and therefore
has O(n) time complexity with respected to the number of created BHs.

Rewrite BHs so that only scheduled or deleted BHs are enqueued.
Only BHs that actually require action will be iterated.

One semantic change is required: qemu_bh_delete() enqueues the BH and
therefore invokes aio_notify().  The
tests/test-aio.c:test_source_bh_delete_from_cb() test case assumed that
g_main_context_iteration(NULL, false) returns false after
qemu_bh_delete() but it now returns true for one iteration.  Fix up the
test case.

This patch makes aio_compute_timeout() and aio_bh_poll() drop from a CPU
profile reported by perf-top(1).  Previously they combined to 9% CPU
utilization when AioContext polling is commented out and the guest has 2
virtio-blk,num-queues=1 and 99 virtio-blk,num-queues=32 devices.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 20200221093951.1414693-1-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2020-02-22 08:26:47 +00:00
..
acceptance tests/acceptance: Remove shebang header 2020-02-07 15:12:48 +01:00
data virt/acpi: update golden masters for DSDT update 2020-02-13 14:14:53 +00:00
decode decodetree: Allow !function with no input bits 2019-08-19 08:03:41 -07:00
docker drop "from __future__ import print_function" 2020-02-07 15:15:16 +01:00
fp testing: don't nest build for fp-test 2020-01-09 11:41:29 +00:00
guest-debug drop "from __future__ import print_function" 2020-02-07 15:15:16 +01:00
image-fuzzer image-fuzzer: Use OSerror.strerror instead of tuple subscript 2019-11-05 16:36:11 +01:00
keys
migration drop "from __future__ import print_function" 2020-02-07 15:15:16 +01:00
multiboot tests/multiboot: Fix load address of test kernels 2019-07-30 12:25:43 +02:00
perf/block/qcow2 tests/perf: Test lseek influence on qcow2 block-status 2019-06-04 15:20:41 +02:00
plugin tcg plugins: expose an API version concept 2019-11-12 14:32:55 +00:00
qapi-schema drop "from __future__ import print_function" 2020-02-07 15:15:16 +01:00
qemu-iotests iotests: Test snapshot -l field separation 2020-02-20 16:43:42 +01:00
qtest tests/qtest/libqos/qgraph: Remove superfluous semicolons 2020-02-18 20:20:49 +01:00
rocker
tcg tests/tcg: gate pauth-% tests on having compiler support 2020-02-04 17:13:29 +00:00
uefi-test-tools edk2 build scripts: work around TianoCore#1607 without forcing Python 2 2019-10-07 15:14:15 +02:00
vm drop "from __future__ import print_function" 2020-02-07 15:15:16 +01:00
vmstate-static-checker-data
.gitignore qapi: Generate command registration stuff into separate files 2020-01-14 11:01:58 +01:00
atomic64-bench.c tests: use g_usleep instead of rem = sleep(time) 2019-01-14 14:52:30 +00:00
atomic_add-bench.c tests: use g_usleep instead of rem = sleep(time) 2019-01-14 14:52:30 +00:00
benchmark-crypto-cipher.c tests: benchmark crypto with fixed data size, not time period 2019-10-28 13:32:21 +01:00
benchmark-crypto-hash.c tests: benchmark crypto with fixed data size, not time period 2019-10-28 13:32:21 +01:00
benchmark-crypto-hmac.c
check-block-qdict.c
check-block.sh build: move TARGET_GPROF to config-host.mak 2020-02-12 16:29:27 +01:00
check-qdict.c tests: Move qdict-test-data.txt to tests/data/qobject/ 2019-03-07 22:05:54 +01:00
check-qjson.c test: Use g_strndup instead of plain strndup 2019-08-21 10:27:13 +02:00
check-qlist.c
check-qlit.c
check-qnull.c
check-qnum.c
check-qobject.c
check-qom-interface.c
check-qom-proplist.c
check-qstring.c
crypto-tls-psk-helpers.c
crypto-tls-psk-helpers.h Supply missing header guards 2019-06-12 13:20:21 +02:00
crypto-tls-x509-helpers.c
crypto-tls-x509-helpers.h Supply missing header guards 2019-06-12 13:20:21 +02:00
dbus-vmstate-daemon.sh tests: add dbus-vmstate-test 2020-01-06 18:41:32 +04:00
io-channel-helpers.c
io-channel-helpers.h Normalize position of header guard 2019-06-12 13:20:20 +02:00
iothread.c tests/iothread: Always connect iothread GSource to a GMainContext 2020-01-07 14:32:57 +00:00
iothread.h
Makefile.include rcu_queue: add QSLIST functions 2020-02-22 08:26:47 +00:00
pkix_asn1_tab.c
ptimer-test-stubs.c util/qemu-timer: refactor deadline calculation for external timers 2019-08-20 17:26:21 +02:00
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 tests: use g_usleep instead of rem = sleep(time) 2019-01-14 14:52:30 +00:00
rcutorture.c
requirements.txt Acceptance tests: use avocado.utils.ssh for SSH interaction 2019-09-20 17:13:41 -04:00
socket-helpers.c tests: specify the address family when checking bind 2019-08-22 17:30:25 +04:00
socket-helpers.h tests: specify the address family when checking bind 2019-08-22 17:30:25 +04:00
test-aio-multithread.c tests: Do not use "\n" in g_test_message() strings 2019-03-07 22:16:22 +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 Include qemu/module.h where needed, drop it from qemu-common.h 2019-06-12 13:18:33 +02:00
test-authz-listfile.c Include qemu/module.h where needed, drop it from qemu-common.h 2019-06-12 13:18:33 +02:00
test-authz-pam.c Include qemu/module.h where needed, drop it from qemu-common.h 2019-06-12 13:18:33 +02:00
test-authz-simple.c Include qemu/module.h where needed, drop it from qemu-common.h 2019-06-12 13:18:33 +02:00
test-base64.c
test-bdrv-drain.c job: drop job_drain 2019-09-10 08:58:43 +02:00
test-bdrv-graph-mod.c Include qemu/main-loop.h less 2019-08-16 13:31:52 +02:00
test-bitcnt.c
test-bitmap.c tests: use g_test_rand_int 2019-12-17 09:05:23 +01:00
test-bitops.c
test-block-backend.c Include qemu/main-loop.h less 2019-08-16 13:31:52 +02:00
test-block-iothread.c block: Add @exact parameter to bdrv_co_truncate() 2019-10-28 12:00:07 +01:00
test-blockjob-txn.c job: drop job_drain 2019-09-10 08:58:43 +02:00
test-blockjob.c tests-blockjob: Use error_free_or_abort() 2019-12-18 08:36:16 +01:00
test-bufferiszero.c
test-char.c chardev: Use QEMUChrEvent enum in IOEventHandler typedef 2020-01-08 11:15:35 +01:00
test-clone-visitor.c tests: Rename UserDefNativeListUnion to UserDefListUnion 2019-03-05 14:43:11 +01:00
test-coroutine.c tests: Do not use "\n" in g_test_message() strings 2019-03-07 22:16:22 +01:00
test-crypto-afsplit.c
test-crypto-block.c Include qemu/module.h where needed, drop it from qemu-common.h 2019-06-12 13:18:33 +02:00
test-crypto-cipher.c
test-crypto-hash.c
test-crypto-hmac.c
test-crypto-ivgen.c
test-crypto-pbkdf.c test: execute g_test_run when tests are skipped 2019-01-11 13:57:25 +01:00
test-crypto-secret.c
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
test-cutils.c
test-hbitmap.c util/hbitmap: strict hbitmap_reset 2019-10-17 17:02:32 -04:00
test-image-locking.c Include qemu/main-loop.h less 2019-08-16 13:31:52 +02:00
test-int128.c
test-io-channel-buffer.c Include qemu/module.h where needed, drop it from qemu-common.h 2019-06-12 13:18:33 +02:00
test-io-channel-command.c Include qemu/module.h where needed, drop it from qemu-common.h 2019-06-12 13:18:33 +02:00
test-io-channel-file.c Include qemu/module.h where needed, drop it from qemu-common.h 2019-06-12 13:18:33 +02:00
test-io-channel-socket.c socket: Add num connections to qio_channel_socket_async() 2019-09-03 23:24:42 +02:00
test-io-channel-tls.c glib: use portable g_setenv() 2019-12-17 09:05:23 +01:00
test-io-task.c Include qemu/module.h where needed, drop it from qemu-common.h 2019-06-12 13:18:33 +02:00
test-iov.c
test-keyval.c test-keyval: Tighten test of trailing crap after size 2019-12-18 12:28:44 +01:00
test-logging.c test-logging: Fix -Werror=maybe-uninitialized warning 2020-02-04 09:00:57 +01:00
test-mul64.c
test-opts-visitor.c
test-qapi-util.c
test-qdev-global-props.c qdev: set properties with device_class_set_props() 2020-01-24 20:59:15 +01:00
test-qdist.c
test-qemu-opts.c
test-qga.c tests: use g_test_rand_int 2019-12-17 09:05:23 +01:00
test-qgraph.c tests: test-qgraph: fix a memory leak 2019-03-11 16:33:49 +01:00
test-qht-par.c
test-qht.c
test-qmp-cmds.c qapi: Generate command registration stuff into separate files 2020-01-14 11:01:58 +01:00
test-qmp-event.c qapi: Generate QAPIEvent stuff into separate files 2019-02-18 14:44:04 +01:00
test-qobject-input-visitor.c tests: Rename UserDefNativeListUnion to UserDefListUnion 2019-03-05 14:43:11 +01:00
test-qobject-output-visitor.c tests: Clean up initialization of Error *err variables 2019-12-18 08:36:15 +01:00
test-rcu-list.c rcu_queue: add QSLIST functions 2020-02-22 08:26:47 +00:00
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 Include qemu/main-loop.h less 2019-08-16 13:31:52 +02:00
test-shift128.c
test-string-input-visitor.c tests: Fix uninitialized byte in test_visitor_in_fuzz 2019-08-20 17:26:19 +02:00
test-string-output-visitor.c tests: Clean up initialization of Error *err variables 2019-12-18 08:36:15 +01:00
test-thread-pool.c test-thread-pool: be more reliable 2019-06-03 14:03:00 +02:00
test-throttle.c test-throttle: Fix uninitialized use of burst_length 2019-08-20 17:26:19 +02:00
test-timed-average.c
test-util-filemonitor.c tests/test-util-filemonitor: Skip test on non-x86 Travis containers 2019-12-18 20:17:45 +00:00
test-util-sockets.c socket: Add backlog parameter to socket_listen 2019-09-03 23:24:42 +02:00
test-uuid.c
test-visitor-serialization.c
test-vmstate.c migration: Support QLIST migration 2020-01-20 09:10:23 +01:00
test-write-threshold.c
test-x86-cpuid.c i386: Update new x86_apicid parsing rules with die_offset support 2019-07-05 17:08:03 -03:00
test-xbzrle.c
vhost-user-bridge.c core: replace getpagesize() with qemu_real_host_page_size 2019-10-26 15:38:06 +02:00