tests: Add dirty page rate limit test
Add dirty page rate limit test if kernel support dirty ring, The following qmp commands are covered by this test case: "calc-dirty-rate", "query-dirty-rate", "set-vcpu-dirty-limit", "cancel-vcpu-dirty-limit" and "query-vcpu-dirty-limit". Signed-off-by: Hyman Huang(黄勇) <huangy81@chinatelecom.cn> Acked-by: Peter Xu <peterx@redhat.com> Message-Id: <eed5b847a6ef0a9c02a36383dbdd7db367dd1e7e.1656177590.git.huangy81@chinatelecom.cn> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Hyman Huang(黄勇)
Dr. David Alan Gilbert
parent
f3b2e38cfb
commit
8aff6f501d
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@ -83,6 +83,28 @@ QDict *wait_command(QTestState *who, const char *command, ...)
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return ret;
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}
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/*
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* Execute the qmp command only
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*/
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QDict *qmp_command(QTestState *who, const char *command, ...)
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{
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va_list ap;
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QDict *resp, *ret;
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va_start(ap, command);
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resp = qtest_vqmp(who, command, ap);
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va_end(ap);
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g_assert(!qdict_haskey(resp, "error"));
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g_assert(qdict_haskey(resp, "return"));
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ret = qdict_get_qdict(resp, "return");
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qobject_ref(ret);
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qobject_unref(resp);
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return ret;
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}
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/*
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* Send QMP command "migrate".
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* Arguments are built from @fmt... (formatted like
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@ -23,6 +23,8 @@ QDict *wait_command_fd(QTestState *who, int fd, const char *command, ...);
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G_GNUC_PRINTF(2, 3)
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QDict *wait_command(QTestState *who, const char *command, ...);
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QDict *qmp_command(QTestState *who, const char *command, ...);
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G_GNUC_PRINTF(3, 4)
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void migrate_qmp(QTestState *who, const char *uri, const char *fmt, ...);
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@ -24,6 +24,7 @@
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#include "qapi/qobject-input-visitor.h"
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#include "qapi/qobject-output-visitor.h"
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#include "crypto/tlscredspsk.h"
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#include "qapi/qmp/qlist.h"
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#include "migration-helpers.h"
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#include "tests/migration/migration-test.h"
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@ -46,6 +47,12 @@ unsigned start_address;
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unsigned end_address;
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static bool uffd_feature_thread_id;
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/*
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* Dirtylimit stop working if dirty page rate error
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* value less than DIRTYLIMIT_TOLERANCE_RANGE
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*/
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#define DIRTYLIMIT_TOLERANCE_RANGE 25 /* MB/s */
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#if defined(__linux__)
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#include <sys/syscall.h>
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#include <sys/vfs.h>
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@ -2059,6 +2066,253 @@ static void test_multifd_tcp_cancel(void)
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test_migrate_end(from, to2, true);
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}
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static void calc_dirty_rate(QTestState *who, uint64_t calc_time)
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{
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qobject_unref(qmp_command(who,
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"{ 'execute': 'calc-dirty-rate',"
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"'arguments': { "
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"'calc-time': %ld,"
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"'mode': 'dirty-ring' }}",
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calc_time));
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}
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static QDict *query_dirty_rate(QTestState *who)
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{
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return qmp_command(who, "{ 'execute': 'query-dirty-rate' }");
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}
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static void dirtylimit_set_all(QTestState *who, uint64_t dirtyrate)
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{
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qobject_unref(qmp_command(who,
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"{ 'execute': 'set-vcpu-dirty-limit',"
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"'arguments': { "
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"'dirty-rate': %ld } }",
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dirtyrate));
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}
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static void cancel_vcpu_dirty_limit(QTestState *who)
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{
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qobject_unref(qmp_command(who,
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"{ 'execute': 'cancel-vcpu-dirty-limit' }"));
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}
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static QDict *query_vcpu_dirty_limit(QTestState *who)
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{
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QDict *rsp;
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rsp = qtest_qmp(who, "{ 'execute': 'query-vcpu-dirty-limit' }");
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g_assert(!qdict_haskey(rsp, "error"));
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g_assert(qdict_haskey(rsp, "return"));
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return rsp;
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}
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static bool calc_dirtyrate_ready(QTestState *who)
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{
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QDict *rsp_return;
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gchar *status;
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rsp_return = query_dirty_rate(who);
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g_assert(rsp_return);
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status = g_strdup(qdict_get_str(rsp_return, "status"));
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g_assert(status);
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return g_strcmp0(status, "measuring");
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}
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static void wait_for_calc_dirtyrate_complete(QTestState *who,
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int64_t time_s)
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{
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int max_try_count = 10000;
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usleep(time_s * 1000000);
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while (!calc_dirtyrate_ready(who) && max_try_count--) {
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usleep(1000);
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}
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/*
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* Set the timeout with 10 s(max_try_count * 1000us),
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* if dirtyrate measurement not complete, fail test.
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*/
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g_assert_cmpint(max_try_count, !=, 0);
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}
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static int64_t get_dirty_rate(QTestState *who)
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{
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QDict *rsp_return;
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gchar *status;
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QList *rates;
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const QListEntry *entry;
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QDict *rate;
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int64_t dirtyrate;
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rsp_return = query_dirty_rate(who);
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g_assert(rsp_return);
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status = g_strdup(qdict_get_str(rsp_return, "status"));
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g_assert(status);
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g_assert_cmpstr(status, ==, "measured");
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rates = qdict_get_qlist(rsp_return, "vcpu-dirty-rate");
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g_assert(rates && !qlist_empty(rates));
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entry = qlist_first(rates);
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g_assert(entry);
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rate = qobject_to(QDict, qlist_entry_obj(entry));
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g_assert(rate);
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dirtyrate = qdict_get_try_int(rate, "dirty-rate", -1);
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qobject_unref(rsp_return);
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return dirtyrate;
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}
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static int64_t get_limit_rate(QTestState *who)
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{
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QDict *rsp_return;
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QList *rates;
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const QListEntry *entry;
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QDict *rate;
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int64_t dirtyrate;
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rsp_return = query_vcpu_dirty_limit(who);
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g_assert(rsp_return);
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rates = qdict_get_qlist(rsp_return, "return");
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g_assert(rates && !qlist_empty(rates));
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entry = qlist_first(rates);
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g_assert(entry);
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rate = qobject_to(QDict, qlist_entry_obj(entry));
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g_assert(rate);
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dirtyrate = qdict_get_try_int(rate, "limit-rate", -1);
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qobject_unref(rsp_return);
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return dirtyrate;
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}
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static QTestState *dirtylimit_start_vm(void)
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{
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QTestState *vm = NULL;
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g_autofree gchar *cmd = NULL;
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const char *arch = qtest_get_arch();
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g_autofree char *bootpath = NULL;
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assert((strcmp(arch, "x86_64") == 0));
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bootpath = g_strdup_printf("%s/bootsect", tmpfs);
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assert(sizeof(x86_bootsect) == 512);
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init_bootfile(bootpath, x86_bootsect, sizeof(x86_bootsect));
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cmd = g_strdup_printf("-accel kvm,dirty-ring-size=4096 "
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"-name dirtylimit-test,debug-threads=on "
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"-m 150M -smp 1 "
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"-serial file:%s/vm_serial "
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"-drive file=%s,format=raw ",
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tmpfs, bootpath);
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vm = qtest_init(cmd);
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return vm;
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}
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static void dirtylimit_stop_vm(QTestState *vm)
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{
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qtest_quit(vm);
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cleanup("bootsect");
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cleanup("vm_serial");
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}
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static void test_vcpu_dirty_limit(void)
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{
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QTestState *vm;
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int64_t origin_rate;
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int64_t quota_rate;
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int64_t rate ;
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int max_try_count = 20;
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int hit = 0;
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/* Start vm for vcpu dirtylimit test */
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vm = dirtylimit_start_vm();
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/* Wait for the first serial output from the vm*/
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wait_for_serial("vm_serial");
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/* Do dirtyrate measurement with calc time equals 1s */
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calc_dirty_rate(vm, 1);
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/* Sleep calc time and wait for calc dirtyrate complete */
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wait_for_calc_dirtyrate_complete(vm, 1);
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/* Query original dirty page rate */
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origin_rate = get_dirty_rate(vm);
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/* VM booted from bootsect should dirty memory steadily */
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assert(origin_rate != 0);
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/* Setup quota dirty page rate at half of origin */
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quota_rate = origin_rate / 2;
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/* Set dirtylimit */
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dirtylimit_set_all(vm, quota_rate);
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/*
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* Check if set-vcpu-dirty-limit and query-vcpu-dirty-limit
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* works literally
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*/
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g_assert_cmpint(quota_rate, ==, get_limit_rate(vm));
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/* Sleep a bit to check if it take effect */
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usleep(2000000);
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/*
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* Check if dirtylimit take effect realistically, set the
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* timeout with 20 s(max_try_count * 1s), if dirtylimit
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* doesn't take effect, fail test.
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*/
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while (--max_try_count) {
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calc_dirty_rate(vm, 1);
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wait_for_calc_dirtyrate_complete(vm, 1);
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rate = get_dirty_rate(vm);
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/*
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* Assume hitting if current rate is less
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* than quota rate (within accepting error)
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*/
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if (rate < (quota_rate + DIRTYLIMIT_TOLERANCE_RANGE)) {
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hit = 1;
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break;
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}
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}
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g_assert_cmpint(hit, ==, 1);
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hit = 0;
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max_try_count = 20;
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/* Check if dirtylimit cancellation take effect */
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cancel_vcpu_dirty_limit(vm);
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while (--max_try_count) {
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calc_dirty_rate(vm, 1);
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wait_for_calc_dirtyrate_complete(vm, 1);
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rate = get_dirty_rate(vm);
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/*
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* Assume dirtylimit be canceled if current rate is
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* greater than quota rate (within accepting error)
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*/
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if (rate > (quota_rate + DIRTYLIMIT_TOLERANCE_RANGE)) {
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hit = 1;
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break;
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}
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}
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g_assert_cmpint(hit, ==, 1);
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dirtylimit_stop_vm(vm);
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}
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static bool kvm_dirty_ring_supported(void)
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{
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#if defined(__linux__) && defined(HOST_X86_64)
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@ -2204,6 +2458,8 @@ int main(int argc, char **argv)
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if (kvm_dirty_ring_supported()) {
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qtest_add_func("/migration/dirty_ring",
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test_precopy_unix_dirty_ring);
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qtest_add_func("/migration/vcpu_dirty_limit",
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test_vcpu_dirty_limit);
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}
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ret = g_test_run();
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