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tests/migration: Allow longer timeouts 

In travis, with gcov and gprof we're seeing timeouts; hopefully fix
this by increasing the test timeouts a bit, but for xbzrle ensure it
really does get a couple of cycles through to test the cache.

I think the problem in travis is we have about 2 host CPU threads,
in the test we have at least 3:
   a) The vCPU thread (100% flat out)
   b) The source migration thread
   c) The destination migration thread

if (b) & (c) are slow for any reason - gcov+gperf or a slow host -
then they're sharing one host CPU thread so limit the migration
bandwidth.

Tested on my laptop with:
   taskset -c 0,1 ./tests/qtest/migration-test -p /x86_64/migration

Reported-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20201008160330.130431-1-dgilbert@redhat.com>
[thuth: Move the #define to the right location]
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Dr. David Alan Gilbert 2020-10-08 17:03:30 +01:00 committed by Thomas Huth
parent d8dd109501
commit a4339de2de
1 changed files with 11 additions and 10 deletions
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21
tests/qtest/migration-test.c
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@ -34,6 +34,9 @@ unsigned start_address;
unsigned end_address;
static bool uffd_feature_thread_id;
/* A downtime where the test really should converge */
#define CONVERGE_DOWNTIME 1000
#if defined(__linux__)
#include <sys/syscall.h>
#include <sys/vfs.h>
@ -864,8 +867,7 @@ static void test_precopy_unix(void)
wait_for_migration_pass(from);
/* 300 ms should converge */
migrate_set_parameter_int(from, "downtime-limit", 300);
migrate_set_parameter_int(from, "downtime-limit", CONVERGE_DOWNTIME);
if (!got_stop) {
qtest_qmp_eventwait(from, "STOP");
@ -946,10 +948,12 @@ static void test_xbzrle(const char *uri)
migrate_qmp(from, uri, "{}");
wait_for_migration_pass(from);
/* Make sure we have 2 passes, so the xbzrle cache gets a workout */
wait_for_migration_pass(from);
/* 300ms should converge */
migrate_set_parameter_int(from, "downtime-limit", 300);
/* 1000ms should converge */
migrate_set_parameter_int(from, "downtime-limit", 1000);
if (!got_stop) {
qtest_qmp_eventwait(from, "STOP");
@ -999,8 +1003,7 @@ static void test_precopy_tcp(void)
wait_for_migration_pass(from);
/* 300ms should converge */
migrate_set_parameter_int(from, "downtime-limit", 300);
migrate_set_parameter_int(from, "downtime-limit", CONVERGE_DOWNTIME);
if (!got_stop) {
qtest_qmp_eventwait(from, "STOP");
@ -1068,8 +1071,7 @@ static void test_migrate_fd_proto(void)
wait_for_migration_pass(from);
/* 300ms should converge */
migrate_set_parameter_int(from, "downtime-limit", 300);
migrate_set_parameter_int(from, "downtime-limit", CONVERGE_DOWNTIME);
if (!got_stop) {
qtest_qmp_eventwait(from, "STOP");
@ -1304,8 +1306,7 @@ static void test_multifd_tcp(const char *method)
wait_for_migration_pass(from);
/* 300ms it should converge */
migrate_set_parameter_int(from, "downtime-limit", 300);
migrate_set_parameter_int(from, "downtime-limit", CONVERGE_DOWNTIME);
if (!got_stop) {
qtest_qmp_eventwait(from, "STOP");