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| 1 | +import pytest |
| 2 | +import time |
| 3 | + |
| 4 | + |
| 5 | +class TestBuffer(object): |
| 6 | + LOSSLESS_PGS = [3, 4] |
| 7 | + INTF = "Ethernet0" |
| 8 | + |
| 9 | + def setup_db(self, dvs): |
| 10 | + self.app_db = dvs.get_app_db() |
| 11 | + self.asic_db = dvs.get_asic_db() |
| 12 | + self.config_db = dvs.get_config_db() |
| 13 | + self.counter_db = dvs.get_counters_db() |
| 14 | + |
| 15 | + # enable PG watermark |
| 16 | + self.set_pg_wm_status('enable') |
| 17 | + |
| 18 | + def get_pg_oid(self, pg): |
| 19 | + fvs = dict() |
| 20 | + fvs = self.counter_db.get_entry("COUNTERS_PG_NAME_MAP", "") |
| 21 | + return fvs[pg] |
| 22 | + |
| 23 | + def set_pg_wm_status(self, state): |
| 24 | + fvs = {'FLEX_COUNTER_STATUS': state} |
| 25 | + self.config_db.update_entry("FLEX_COUNTER_TABLE", "PG_WATERMARK", fvs) |
| 26 | + time.sleep(1) |
| 27 | + |
| 28 | + def teardown(self): |
| 29 | + # disable PG watermark |
| 30 | + self.set_pg_wm_status('disable') |
| 31 | + |
| 32 | + def get_asic_buf_profile(self): |
| 33 | + return set(self.asic_db.get_keys("ASIC_STATE:SAI_OBJECT_TYPE_BUFFER_PROFILE")) |
| 34 | + |
| 35 | + def check_new_profile_in_asic_db(self, profile): |
| 36 | + retry_count = 0 |
| 37 | + self.new_profile = None |
| 38 | + while retry_count < 5: |
| 39 | + retry_count += 1 |
| 40 | + diff = set(self.asic_db.get_keys("ASIC_STATE:SAI_OBJECT_TYPE_BUFFER_PROFILE")) - self.orig_profiles |
| 41 | + if len(diff) == 1: |
| 42 | + self.new_profile = diff.pop() |
| 43 | + break |
| 44 | + else: |
| 45 | + time.sleep(1) |
| 46 | + assert self.new_profile, "Can't get SAI OID for newly created profile {} after retry {} times".format(profile, retry_count) |
| 47 | + |
| 48 | + def get_asic_buf_pg_profiles(self): |
| 49 | + self.buf_pg_profile = dict() |
| 50 | + for pg in self.pg_name_map: |
| 51 | + buf_pg_entries = self.asic_db.get_entry("ASIC_STATE:SAI_OBJECT_TYPE_INGRESS_PRIORITY_GROUP", self.pg_name_map[pg]) |
| 52 | + self.buf_pg_profile[pg] = buf_pg_entries["SAI_INGRESS_PRIORITY_GROUP_ATTR_BUFFER_PROFILE"] |
| 53 | + |
| 54 | + def change_cable_len(self, cable_len): |
| 55 | + fvs = dict() |
| 56 | + fvs[self.INTF] = cable_len |
| 57 | + self.config_db.update_entry("CABLE_LENGTH", "AZURE", fvs) |
| 58 | + |
| 59 | + @pytest.fixture |
| 60 | + def setup_teardown_test(self, dvs): |
| 61 | + try: |
| 62 | + self.setup_db(dvs) |
| 63 | + pg_name_map = dict() |
| 64 | + for pg in self.LOSSLESS_PGS: |
| 65 | + pg_name = "{}:{}".format(self.INTF, pg) |
| 66 | + pg_name_map[pg_name] = self.get_pg_oid(pg_name) |
| 67 | + yield pg_name_map |
| 68 | + finally: |
| 69 | + self.teardown() |
| 70 | + |
| 71 | + def test_zero_cable_len_profile_update(self, dvs, setup_teardown_test): |
| 72 | + self.pg_name_map = setup_teardown_test |
| 73 | + orig_cable_len = None |
| 74 | + orig_speed = None |
| 75 | + try: |
| 76 | + dvs.runcmd("config interface startup {}".format(self.INTF)) |
| 77 | + self.orig_profiles = self.get_asic_buf_profile() |
| 78 | + # get orig cable length and speed |
| 79 | + fvs = self.config_db.get_entry("CABLE_LENGTH", "AZURE") |
| 80 | + orig_cable_len = fvs[self.INTF] |
| 81 | + fvs = self.config_db.get_entry("PORT", self.INTF) |
| 82 | + orig_speed = fvs["speed"] |
| 83 | + |
| 84 | + if orig_speed == "100000": |
| 85 | + test_speed = "40000" |
| 86 | + elif orig_speed == "40000": |
| 87 | + test_speed = "100000" |
| 88 | + test_cable_len = "0m" |
| 89 | + |
| 90 | + # check if the lossless profile for the test speed is already present |
| 91 | + fvs = dict() |
| 92 | + new_lossless_profile = "pg_lossless_{}_{}_profile".format(test_speed, orig_cable_len) |
| 93 | + fvs = self.app_db.get_entry("BUFFER_PROFILE_TABLE", new_lossless_profile) |
| 94 | + if len(fvs): |
| 95 | + profile_exp_cnt_diff = 0 |
| 96 | + else: |
| 97 | + profile_exp_cnt_diff = 1 |
| 98 | + |
| 99 | + # get the orig buf profiles attached to the pgs |
| 100 | + self.get_asic_buf_pg_profiles() |
| 101 | + |
| 102 | + # change cable length to 'test_cable_len' |
| 103 | + self.change_cable_len(test_cable_len) |
| 104 | + |
| 105 | + # change intf speed to 'test_speed' |
| 106 | + dvs.runcmd("config interface speed {} {}".format(self.INTF, test_speed)) |
| 107 | + test_lossless_profile = "pg_lossless_{}_{}_profile".format(test_speed, test_cable_len) |
| 108 | + # buffer profile should not get created |
| 109 | + self.app_db.wait_for_deleted_entry("BUFFER_PROFILE_TABLE", test_lossless_profile) |
| 110 | + |
| 111 | + # buffer pgs should still point to the original buffer profile |
| 112 | + orig_lossless_profile = "pg_lossless_{}_{}_profile".format(orig_speed, orig_cable_len) |
| 113 | + self.app_db.wait_for_field_match("BUFFER_PG_TABLE", self.INTF + ":3-4", {"profile": "[BUFFER_PROFILE_TABLE:{}]".format(orig_lossless_profile)}) |
| 114 | + fvs = dict() |
| 115 | + for pg in self.pg_name_map: |
| 116 | + fvs["SAI_INGRESS_PRIORITY_GROUP_ATTR_BUFFER_PROFILE"] = self.buf_pg_profile[pg] |
| 117 | + self.asic_db.wait_for_field_match("ASIC_STATE:SAI_OBJECT_TYPE_INGRESS_PRIORITY_GROUP", self.pg_name_map[pg], fvs) |
| 118 | + |
| 119 | + # change cable length to 'orig_cable_len' |
| 120 | + self.change_cable_len(orig_cable_len) |
| 121 | + |
| 122 | + # change intf speed to 'test_speed' |
| 123 | + dvs.runcmd("config interface speed {} {}".format(self.INTF, test_speed)) |
| 124 | + if profile_exp_cnt_diff != 0: |
| 125 | + # new profile will get created |
| 126 | + self.app_db.wait_for_entry("BUFFER_PROFILE_TABLE", new_lossless_profile) |
| 127 | + self.check_new_profile_in_asic_db(new_lossless_profile) |
| 128 | + # verify that buffer pgs point to the new profile |
| 129 | + fvs = dict() |
| 130 | + for pg in self.pg_name_map: |
| 131 | + fvs["SAI_INGRESS_PRIORITY_GROUP_ATTR_BUFFER_PROFILE"] = self.new_profile |
| 132 | + self.asic_db.wait_for_field_match("ASIC_STATE:SAI_OBJECT_TYPE_INGRESS_PRIORITY_GROUP", self.pg_name_map[pg], fvs) |
| 133 | + |
| 134 | + else: |
| 135 | + # verify that buffer pgs do not point to the old profile since we cannot deduce the new profile oid |
| 136 | + fvs = dict() |
| 137 | + for pg in self.pg_name_map: |
| 138 | + fvs["SAI_INGRESS_PRIORITY_GROUP_ATTR_BUFFER_PROFILE"] = self.buf_pg_profile[pg] |
| 139 | + self.asic_db.wait_for_field_negative_match("ASIC_STATE:SAI_OBJECT_TYPE_INGRESS_PRIORITY_GROUP", self.pg_name_map[pg], fvs) |
| 140 | + finally: |
| 141 | + if orig_cable_len: |
| 142 | + self.change_cable_len(orig_cable_len) |
| 143 | + if orig_speed: |
| 144 | + dvs.runcmd("config interface speed {} {}".format(self.INTF, orig_speed)) |
| 145 | + dvs.runcmd("config interface shutdown {}".format(self.INTF)) |
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