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# Copyright (c) 2021 Cisco and/or its affiliates.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

*** Settings ***
| Resource | resources/libraries/robot/shared/default.robot
| Resource | resources/libraries/robot/crypto/ipsec.robot
|
| Force Tags | 3_NODE_SINGLE_LINK_TOPO | PERFTEST | HW_ENV | RECONF | TNL_40
| ... | IP4FWD | IPSEC | IPSECSW | IPSECINT | NIC_Intel-X710 | SCALE
| ... | AES_128_GCM | AES | 1_ADDED_TUNNEL | DRV_VFIO_PCI
| ... | RXQ_SIZE_0 | TXQ_SIZE_0
| ... | ethip4ipsec40tnlsw-1atnl-ip4base-int-aes128gcm
|
| Suite Setup | Setup suite topology interfaces | performance
| Suite Teardown | Tear down suite | performance
| Test Setup | Setup test | performance
| Test Teardown | Tear down test | performance | ipsec_sa
|
| Test Template | Local Template
|
| Documentation | **RFC2544: Packet loss IPv4 IPsec tunnel mode.**
| ... |
| ... | - **[Top] Network Topologies:** TG-DUT1-DUT2-TG 3-node circular \
| ... | topology with single links between nodes.
| ... |
| ... | - **[Enc] Packet Encapsulations:** Eth-IPv4 on TG-DUTn, \
| ... | Eth-IPv4-IPSec on DUT1-DUT2.
| ... |
| ... | - **[Cfg] DUT configuration:** DUT1 and DUT2 are configured with \
| ... | multiple IPsec tunnels between them. DUTs get IPv4 traffic from TG, \
| ... | encrypt it and send to another DUT, where packets are decrypted and \
| ... | sent back to TG.
| ... |
| ... | - **[Ver] TG verification:** TG finds throughput NDR (Non Drop Rate) \
| ... | with zero packet loss tolerance, then measures loss at this load \
| ... | while additional chain is configured. \
| ... | Test packets are generated by TG on \
| ... | links to DUTs. TG traffic profile contains two L3 flow-groups \
| ... | (flow-group per direction, number of flows per flow-group equals to \
| ... | number of IPSec tunnels) with all packets \
| ... | containing Ethernet header, IPv4 header with IP protocol=61 and \
| ... | static payload. MAC addresses are matching MAC addresses of the TG \
| ... | node interfaces. Incrementing of IP.dst (IPv4 destination address) \
| ... | is applied to both streams.
| ... |
| ... | - **[Ref] Applicable standard specifications:** RFC4303 and RFC2544.

*** Variables ***
| @{plugins_to_enable}= | dpdk_plugin.so | perfmon_plugin.so
| ... | crypto_native_plugin.so
| ... | crypto_ipsecmb_plugin.so | crypto_openssl_plugin.so
| ${crypto_type}= | ${None}
| ${nic_name}= | Intel-X710
| ${nic_driver}= | vfio-pci
| ${nic_rxq_size}= | 0
| ${nic_txq_size}= | 0
| ${nic_pfs}= | 2
| ${nic_vfs}= | 0
| ${osi_layer}= | L3
| ${overhead}= | ${54}
| ${tg_if1_ip4}= | 192.168.10.254
| ${dut1_if1_ip4}= | 192.168.10.11
| ${dut1_if2_ip4}= | 100.0.0.1
| ${dut2_if1_ip4}= | 200.0.0.102
| ${dut2_if2_ip4}= | 192.168.20.11
| ${tg_if2_ip4}= | 192.168.20.254
| ${raddr_ip4}= | 20.0.0.0
| ${laddr_ip4}= | 10.0.0.0
| ${addr_range}= | ${24}
| ${n_tunnels}= | ${40}
| ${n_added_tunnels}= | ${1}
# Traffic profile:
| ${traffic_profile}= | trex-stl-3n-ethip4-ip4dst${n_tunnels}

*** Keywords ***
| Local Template
| | [Documentation]
| | ... | - **[Cfg]** DUT runs IPSec tunneling AES_128_GCM config. \
| | ... | Each DUT uses ${phy_cores} physical core(s) for worker threads.
| | ... | - **[Ver]** Measure packet loss during reconfig at NDR load.
| |
| | ... | *Arguments:*
| | ... | - frame_size - Framesize in Bytes in integer or string (IMIX_v4_1).
| | ... | Type: integer, string
| | ... | - phy_cores - Number of physical cores. Type: integer
| | ... | - rxq - Number of RX queues, default value: ${None}. Type: integer
| |
| | [Arguments] | ${frame_size} | ${phy_cores} | ${rxq}=${None}
| |
| | Set Test Variable | \${frame_size}
| |
| | # These are enums (not strings) so they cannot be in Variables table.
| | ${encr_alg}= | Crypto Alg AES GCM 128
| | ${auth_alg}= | Set Variable | ${NONE}
| | ${ipsec_proto} = | IPsec Proto ESP
| |
| | ${n_total_tunnels} = | Evaluate | ${n_tunnels} + ${n_added_tunnels}
| | Given Set Max Rate And Jumbo
| | And Add worker threads to all DUTs | ${phy_cores} | ${rxq}
| | And Pre-initialize layer driver | ${nic_driver}
| | And Apply startup configuration on all VPP DUTs
| | When Initialize layer driver | ${nic_driver}
| | And Initialize layer interface
| | And Initialize IPSec in 3-node circular topology
| | And VPP IPsec Create Tunnel Interfaces
| | ... | ${nodes} | ${dut1_if2_ip4} | ${dut2_if1_ip4} | ${DUT1_${int}2}[0]
| | ... | ${DUT2_${int}1}[0] | ${n_tunnels} | ${encr_alg} | ${auth_alg}
| | ... | ${laddr_ip4} | ${raddr_ip4} | ${addr_range}
| | ${unidirectional_throughput} = | Find Throughput Using MLRsearch
| | Start Traffic on Background | ${unidirectional_throughput}
| | And VPP IPsec Create Tunnel Interfaces
| | ... | ${nodes} | ${dut1_if2_ip4} | ${dut2_if1_ip4} | ${DUT1_${int}2}[0]
| | ... | ${DUT2_${int}1}[0] | ${n_total_tunnels} | ${encr_alg} | ${auth_alg}
| | ... | ${laddr_ip4} | ${raddr_ip4} | ${addr_range} | ${n_tunnels}
| | ${result}= | Stop Running Traffic
| | Display Reconfig Test Message | ${result}

*** Test Cases ***
| 64B-1c-ethip4ipsec40tnlsw-1atnl-ip4base-int-aes128gcm-reconf
| | [Tags] | 64B | 1C
| | frame_size=${64} | phy_cores=${1}

| 64B-2c-ethip4ipsec40tnlsw-1atnl-ip4base-int-aes128gcm-reconf
| | [Tags] | 64B | 2C
| | frame_size=${64} | phy_cores=${2}

| 64B-4c-ethip4ipsec40tnlsw-1atnl-ip4base-int-aes128gcm-reconf
| | [Tags] | 64B | 4C
| | frame_size=${64} | phy_cores=${4}

| 1518B-1c-ethip4ipsec40tnlsw-1atnl-ip4base-int-aes128gcm-reconf
| | [Tags] | 1518B | 1C
| | frame_size=${1518} | phy_cores=${1}

| 1518B-2c-ethip4ipsec40tnlsw-1atnl-ip4base-int-aes128gcm-reconf
| | [Tags] | 1518B | 2C
| | frame_size=${1518} | phy_cores=${2}

| 1518B-4c-ethip4ipsec40tnlsw-1atnl-ip4base-int-aes128gcm-reconf
| | [Tags] | 1518B | 4C
| | frame_size=${1518} | phy_cores=${4}

| 9000B-1c-ethip4ipsec40tnlsw-1atnl-ip4base-int-aes128gcm-reconf
| | [Tags] | 9000B | 1C
| | frame_size=${9000} | phy_cores=${1}

| 9000B-2c-ethip4ipsec40tnlsw-1atnl-ip4base-int-aes128gcm-reconf
| | [Tags] | 9000B | 2C
| | frame_size=${9000} | phy_cores=${2}

| 9000B-4c-ethip4ipsec40tnlsw-1atnl-ip4base-int-aes128gcm-reconf
| | [Tags] | 9000B | 4C
| | frame_size=${9000} | phy_cores=${4}

| IMIX-1c-ethip4ipsec40tnlsw-1atnl-ip4base-int-aes128gcm-reconf
| | [Tags] | IMIX | 1C
| | frame_size=IMIX_v4_1 | phy_cores=${1}

| IMIX-2c-ethip4ipsec40tnlsw-1atnl-ip4base-int-aes128gcm-reconf
| | [Tags] | IMIX | 2C
| | frame_size=IMIX_v4_1 | phy_cores=${2}

| IMIX-4c-ethip4ipsec40tnlsw-1atnl-ip4base-int-aes128gcm-reconf
| | [Tags] | IMIX | 4C
| | frame_size=IMIX_v4_1 | phy_cores=${4}
pan> "started"; break; } fformat (stderr, "handle 0x%x (%d) %s at trace %d\n", handle, handle, s, i); } } } } #endif /* TW_START_STOP_TRACE_SIZE > 0 */ static inline u32 TW (make_internal_timer_handle) (u32 pool_index, u32 timer_id) { u32 handle; ASSERT (timer_id < TW_TIMERS_PER_OBJECT); #if LOG2_TW_TIMERS_PER_OBJECT > 0 ASSERT (pool_index < (1 << (32 - LOG2_TW_TIMERS_PER_OBJECT))); handle = (timer_id << (32 - LOG2_TW_TIMERS_PER_OBJECT)) | (pool_index); #else handle = pool_index; #endif return handle; } static inline void timer_addhead (TWT (tw_timer) * pool, u32 head_index, u32 new_index) { TWT (tw_timer) * head = pool_elt_at_index (pool, head_index); TWT (tw_timer) * old_first; u32 old_first_index; TWT (tw_timer) * new; new = pool_elt_at_index (pool, new_index); if (PREDICT_FALSE (head->next == head_index)) { head->next = head->prev = new_index; new->next = new->prev = head_index; return; } old_first_index = head->next; old_first = pool_elt_at_index (pool, old_first_index); new->next = old_first_index; new->prev = old_first->prev; old_first->prev = new_index; head->next = new_index; } static inline void timer_remove (TWT (tw_timer) * pool, TWT (tw_timer) * elt) { TWT (tw_timer) * next_elt, *prev_elt; ASSERT (elt->user_handle != ~0); next_elt = pool_elt_at_index (pool, elt->next); prev_elt = pool_elt_at_index (pool, elt->prev); next_elt->prev = elt->prev; prev_elt->next = elt->next; elt->prev = elt->next = ~0; } static inline void timer_add (TWT (tw_timer_wheel) * tw, TWT (tw_timer) * t, u64 interval) { #if TW_TIMER_WHEELS > 1 u16 slow_ring_offset; u32 carry; #endif #if TW_TIMER_WHEELS > 2 u16 glacier_ring_offset; #endif #if TW_OVERFLOW_VECTOR > 0 u64 interval_plus_time_to_wrap, triple_wrap_mask; #endif u16 fast_ring_offset; tw_timer_wheel_slot_t *ts; /* Factor interval into 1..3 wheel offsets */ #if TW_TIMER_WHEELS > 2 #if TW_OVERFLOW_VECTOR > 0 /* * This is tricky. Put a timer onto the overflow * vector if the interval PLUS the time * until the next triple-wrap exceeds one full revolution * of all three wheels. */ triple_wrap_mask = (1 << (3 * TW_RING_SHIFT)) - 1; interval_plus_time_to_wrap = interval + (tw->current_tick & triple_wrap_mask); if ((interval_plus_time_to_wrap >= 1 << (3 * TW_RING_SHIFT))) { t->expiration_time = tw->current_tick + interval; ts = &tw->overflow; timer_addhead (tw->timers, ts->head_index, t - tw->timers); #if TW_START_STOP_TRACE_SIZE > 0 TW (tw_timer_trace) (tw, timer_id, user_id, t - tw->timers); #endif return; } #endif glacier_ring_offset = interval >> (2 * TW_RING_SHIFT); ASSERT ((u64) glacier_ring_offset < TW_SLOTS_PER_RING); interval -= (((u64) glacier_ring_offset) << (2 * TW_RING_SHIFT)); #endif #if TW_TIMER_WHEELS > 1 slow_ring_offset = interval >> TW_RING_SHIFT; ASSERT ((u64) slow_ring_offset < TW_SLOTS_PER_RING); interval -= (((u64) slow_ring_offset) << TW_RING_SHIFT); #endif fast_ring_offset = interval & TW_RING_MASK; /* * Account for the current wheel positions(s) * This is made slightly complicated by the fact that the current * index vector will contain (TW_SLOTS_PER_RING, ...) when * the actual position is (0, ...) */ fast_ring_offset += tw->current_index[TW_TIMER_RING_FAST] & TW_RING_MASK; #if TW_TIMER_WHEELS > 1 carry = fast_ring_offset >= TW_SLOTS_PER_RING ? 1 : 0; fast_ring_offset %= TW_SLOTS_PER_RING; slow_ring_offset += (tw->current_index[TW_TIMER_RING_SLOW] & TW_RING_MASK) + carry; carry = slow_ring_offset >= TW_SLOTS_PER_RING ? 1 : 0; slow_ring_offset %= TW_SLOTS_PER_RING; #endif #if TW_TIMER_WHEELS > 2 glacier_ring_offset += (tw->current_index[TW_TIMER_RING_GLACIER] & TW_RING_MASK) + carry; glacier_ring_offset %= TW_SLOTS_PER_RING; #endif #if TW_TIMER_WHEELS > 2 if (glacier_ring_offset != (tw->current_index[TW_TIMER_RING_GLACIER] & TW_RING_MASK)) { /* We'll need slow and fast ring offsets later */ t->slow_ring_offset = slow_ring_offset; t->fast_ring_offset = fast_ring_offset; ts = &tw->w[TW_TIMER_RING_GLACIER][glacier_ring_offset]; timer_addhead (tw->timers, ts->head_index, t - tw->timers); #if TW_START_STOP_TRACE_SIZE > 0 TW (tw_timer_trace) (tw, timer_id, user_id, t - tw->timers); #endif return; } #endif #if TW_TIMER_WHEELS > 1 /* Timer expires more than 51.2 seconds from now? */ if (slow_ring_offset != (tw->current_index[TW_TIMER_RING_SLOW] & TW_RING_MASK)) { /* We'll need the fast ring offset later... */ t->fast_ring_offset = fast_ring_offset; ts = &tw->w[TW_TIMER_RING_SLOW][slow_ring_offset]; timer_addhead (tw->timers, ts->head_index, t - tw->timers); #if TW_START_STOP_TRACE_SIZE > 0 TW (tw_timer_trace) (tw, timer_id, user_id, t - tw->timers); #endif return; } #else fast_ring_offset %= TW_SLOTS_PER_RING; #endif /* Timer expires less than one fast-ring revolution from now */ ts = &tw->w[TW_TIMER_RING_FAST][fast_ring_offset]; timer_addhead (tw->timers, ts->head_index, t - tw->timers); #if TW_FAST_WHEEL_BITMAP tw->fast_slot_bitmap = clib_bitmap_set (tw->fast_slot_bitmap, fast_ring_offset, 1); #endif #if TW_START_STOP_TRACE_SIZE > 0 TW (tw_timer_trace) (tw, timer_id, user_id, t - tw->timers); #endif } /** * @brief Start a Tw Timer * @param tw_timer_wheel_t * tw timer wheel object pointer * @param u32 user_id user defined timer id, presumably for a tw session * @param u32 timer_id app-specific timer ID. 4 bits. * @param u64 interval timer interval in ticks * @returns handle needed to cancel the timer */ __clib_export u32 TW (tw_timer_start) (TWT (tw_timer_wheel) * tw, u32 user_id, u32 timer_id, u64 interval) { TWT (tw_timer) * t; ASSERT (interval); pool_get (tw->timers, t); clib_memset (t, 0xff, sizeof (*t)); t->user_handle = TW (make_internal_timer_handle) (user_id, timer_id); timer_add (tw, t, interval); return t - tw->timers; } #if TW_TIMER_SCAN_FOR_HANDLE > 0 int TW (scan_for_handle) (TWT (tw_timer_wheel) * tw, u32 handle) { int i, j; tw_timer_wheel_slot_t *ts; TWT (tw_timer) * t, *head; u32 next_index; int rv = 0; for (i = 0; i < TW_TIMER_WHEELS; i++) { for (j = 0; j < TW_SLOTS_PER_RING; j++) { ts = &tw->w[i][j]; head = pool_elt_at_index (tw->timers, ts->head_index); next_index = head->next; while (next_index != ts->head_index) { t = pool_elt_at_index (tw->timers, next_index); if (next_index == handle) { clib_warning ("handle %d found in ring %d slot %d", handle, i, j); clib_warning ("user handle 0x%x", t->user_handle); rv = 1; } next_index = t->next; } } } return rv; } #endif /* TW_TIMER_SCAN_FOR_HANDLE */ /** * @brief Stop a tw timer * @param tw_timer_wheel_t * tw timer wheel object pointer * @param u32 handle timer cancellation returned by tw_timer_start */ __clib_export void TW (tw_timer_stop) (TWT (tw_timer_wheel) * tw, u32 handle) { TWT (tw_timer) * t; #if TW_TIMER_ALLOW_DUPLICATE_STOP /* * A vlib process may have its timer expire, and receive * an event before the expiration is processed. * That results in a duplicate tw_timer_stop. */ if (pool_is_free_index (tw->timers, handle)) return; #endif #if TW_START_STOP_TRACE_SIZE > 0 TW (tw_timer_trace) (tw, ~0, ~0, handle); #endif t = pool_elt_at_index (tw->timers, handle); /* in case of idiotic handle (e.g. passing a listhead index) */ ASSERT (t->user_handle != ~0); timer_remove (tw->timers, t); pool_put_index (tw->timers, handle); } __clib_export int TW (tw_timer_handle_is_free) (TWT (tw_timer_wheel) * tw, u32 handle) { return pool_is_free_index (tw->timers, handle); } /** * @brief Update a tw timer * @param tw_timer_wheel_t * tw timer wheel object pointer * @param u32 handle timer returned by tw_timer_start * @param u32 interval timer interval in ticks */ __clib_export void TW (tw_timer_update) (TWT (tw_timer_wheel) * tw, u32 handle, u64 interval) { TWT (tw_timer) * t; t = pool_elt_at_index (tw->timers, handle); timer_remove (tw->timers, t); timer_add (tw, t, interval); } /** * @brief Initialize a tw timer wheel template instance * @param tw_timer_wheel_t * tw timer wheel object pointer * @param void * expired_timer_callback. Passed a u32 * vector of * expired timer handles. The callback is optional. * @param f64 timer_interval_in_seconds */ __clib_export void TW (tw_timer_wheel_init) (TWT (tw_timer_wheel) * tw, void *expired_timer_callback, f64 timer_interval_in_seconds, u32 max_expirations) { int ring, slot; tw_timer_wheel_slot_t *ts; TWT (tw_timer) * t; clib_memset (tw, 0, sizeof (*tw)); tw->expired_timer_callback = expired_timer_callback; tw->max_expirations = max_expirations; if (timer_interval_in_seconds == 0.0) { clib_warning ("timer interval is zero"); abort (); } tw->timer_interval = timer_interval_in_seconds; tw->ticks_per_second = 1.0 / timer_interval_in_seconds; vec_validate (tw->expired_timer_handles, 0); vec_set_len (tw->expired_timer_handles, 0); for (ring = 0; ring < TW_TIMER_WHEELS; ring++) { for (slot = 0; slot < TW_SLOTS_PER_RING; slot++) { ts = &tw->w[ring][slot]; pool_get (tw->timers, t); clib_memset (t, 0xff, sizeof (*t)); t->next = t->prev = t - tw->timers; ts->head_index = t - tw->timers; } } #if TW_OVERFLOW_VECTOR > 0 ts = &tw->overflow; pool_get (tw->timers, t); clib_memset (t, 0xff, sizeof (*t)); t->next = t->prev = t - tw->timers; ts->head_index = t - tw->timers; #endif } /** * @brief Free a tw timer wheel template instance * @param tw_timer_wheel_t * tw timer wheel object pointer */ __clib_export void TW (tw_timer_wheel_free) (TWT (tw_timer_wheel) * tw) { int i, j; tw_timer_wheel_slot_t *ts; TWT (tw_timer) * head, *t; u32 next_index; for (i = 0; i < TW_TIMER_WHEELS; i++) { for (j = 0; j < TW_SLOTS_PER_RING; j++) { ts = &tw->w[i][j]; head = pool_elt_at_index (tw->timers, ts->head_index); next_index = head->next; while (next_index != ts->head_index) { t = pool_elt_at_index (tw->timers, next_index); next_index = t->next; pool_put (tw->timers, t); } pool_put (tw->timers, head); } } #if TW_OVERFLOW_VECTOR > 0 ts = &tw->overflow; head = pool_elt_at_index (tw->timers, ts->head_index); next_index = head->next; while (next_index != ts->head_index) { t = pool_elt_at_index (tw->timers, next_index); next_index = t->next; pool_put (tw->timers, t); } pool_put (tw->timers, head); #endif clib_memset (tw, 0, sizeof (*tw)); } /** * @brief Advance a tw timer wheel. Calls the expired timer callback * as needed. This routine should be called once every timer_interval seconds * @param tw_timer_wheel_t * tw timer wheel template instance pointer * @param f64 now the current time, e.g. from vlib_time_now(vm) * @returns u32 * vector of expired user handles */ static inline u32 * TW (tw_timer_expire_timers_internal) (TWT (tw_timer_wheel) * tw, f64 now, u32 * callback_vector_arg) { u32 nticks, i; tw_timer_wheel_slot_t *ts; TWT (tw_timer) * t, *head; u32 *callback_vector; u32 fast_wheel_index; u32 next_index; u32 slow_wheel_index __attribute__ ((unused)); u32 glacier_wheel_index __attribute__ ((unused)); /* Called too soon to process new timer expirations? */ if (PREDICT_FALSE (now < tw->next_run_time)) return callback_vector_arg; /* Number of ticks which have occurred */ nticks = tw->ticks_per_second * (now - tw->last_run_time); if (nticks == 0) return callback_vector_arg; /* Remember when we ran, compute next runtime */ tw->next_run_time = (now + tw->timer_interval); /* First call, or time jumped backwards? */ if (PREDICT_FALSE ((tw->last_run_time == 0.0) || (now <= tw->last_run_time))) { tw->last_run_time = now; return callback_vector_arg; } if (callback_vector_arg == 0) { vec_set_len (tw->expired_timer_handles, 0); callback_vector = tw->expired_timer_handles; } else callback_vector = callback_vector_arg; for (i = 0; i < nticks; i++) { fast_wheel_index = tw->current_index[TW_TIMER_RING_FAST]; if (TW_TIMER_WHEELS > 1) slow_wheel_index = tw->current_index[TW_TIMER_RING_SLOW]; if (TW_TIMER_WHEELS > 2) glacier_wheel_index = tw->current_index[TW_TIMER_RING_GLACIER]; #if TW_OVERFLOW_VECTOR > 0 /* Triple odometer-click? Process the overflow vector... */ if (PREDICT_FALSE (fast_wheel_index == TW_SLOTS_PER_RING && slow_wheel_index == TW_SLOTS_PER_RING && glacier_wheel_index == TW_SLOTS_PER_RING)) { u64 interval; u32 new_glacier_ring_offset, new_slow_ring_offset; u32 new_fast_ring_offset; ts = &tw->overflow; head = pool_elt_at_index (tw->timers, ts->head_index); next_index = head->next; /* Make slot empty */ head->next = head->prev = ts->head_index; /* traverse slot, place timers wherever they go */ while (next_index != head - tw->timers) { t = pool_elt_at_index (tw->timers, next_index); next_index = t->next; /* Remove from the overflow vector (hammer) */ t->next = t->prev = ~0; ASSERT (t->expiration_time >= tw->current_tick); interval = t->expiration_time - tw->current_tick; /* Right back onto the overflow vector? */ if (interval >= (1 << (3 * TW_RING_SHIFT))) { ts = &tw->overflow; timer_addhead (tw->timers, ts->head_index, t - tw->timers); continue; } /* Compute ring offsets */ new_glacier_ring_offset = interval >> (2 * TW_RING_SHIFT); interval -= (new_glacier_ring_offset << (2 * TW_RING_SHIFT)); /* Note: the wheels are at (0,0,0), no add-with-carry needed */ new_slow_ring_offset = interval >> TW_RING_SHIFT; interval -= (new_slow_ring_offset << TW_RING_SHIFT); new_fast_ring_offset = interval & TW_RING_MASK; t->slow_ring_offset = new_slow_ring_offset; t->fast_ring_offset = new_fast_ring_offset; /* Timer expires Right Now */ if (PREDICT_FALSE (t->slow_ring_offset == 0 && t->fast_ring_offset == 0 && new_glacier_ring_offset == 0)) { vec_add1 (callback_vector, t->user_handle); #if TW_START_STOP_TRACE_SIZE > 0 TW (tw_timer_trace) (tw, 0xfe, t->user_handle, t - tw->timers); #endif pool_put (tw->timers, t); } /* Timer moves to the glacier ring */ else if (new_glacier_ring_offset) { ts = &tw->w[TW_TIMER_RING_GLACIER][new_glacier_ring_offset]; timer_addhead (tw->timers, ts->head_index, t - tw->timers); } /* Timer moves to the slow ring */ else if (t->slow_ring_offset) { /* Add to slow ring */ ts = &tw->w[TW_TIMER_RING_SLOW][t->slow_ring_offset]; timer_addhead (tw->timers, ts->head_index, t - tw->timers); } /* Timer timer moves to the fast ring */ else { ts = &tw->w[TW_TIMER_RING_FAST][t->fast_ring_offset]; timer_addhead (tw->timers, ts->head_index, t - tw->timers); #if TW_FAST_WHEEL_BITMAP tw->fast_slot_bitmap = clib_bitmap_set (tw->fast_slot_bitmap, t->fast_ring_offset, 1); #endif } } } #endif #if TW_TIMER_WHEELS > 2 /* * Double odometer-click? Process one slot in the glacier ring... */ if (PREDICT_FALSE (fast_wheel_index == TW_SLOTS_PER_RING && slow_wheel_index == TW_SLOTS_PER_RING)) { glacier_wheel_index %= TW_SLOTS_PER_RING; ts = &tw->w[TW_TIMER_RING_GLACIER][glacier_wheel_index]; head = pool_elt_at_index (tw->timers, ts->head_index); next_index = head->next; /* Make slot empty */ head->next = head->prev = ts->head_index; /* traverse slot, deal timers into slow ring */ while (next_index != head - tw->timers) { t = pool_elt_at_index (tw->timers, next_index); next_index = t->next; /* Remove from glacier ring slot (hammer) */ t->next = t->prev = ~0; /* Timer expires Right Now */ if (PREDICT_FALSE (t->slow_ring_offset == 0 && t->fast_ring_offset == 0)) { vec_add1 (callback_vector, t->user_handle); #if TW_START_STOP_TRACE_SIZE > 0 TW (tw_timer_trace) (tw, 0xfe, t->user_handle, t - tw->timers); #endif pool_put (tw->timers, t); } /* Timer expires during slow-wheel tick 0 */ else if (PREDICT_FALSE (t->slow_ring_offset == 0)) { ts = &tw->w[TW_TIMER_RING_FAST][t->fast_ring_offset]; timer_addhead (tw->timers, ts->head_index, t - tw->timers); #if TW_FAST_WHEEL_BITMAP tw->fast_slot_bitmap = clib_bitmap_set (tw->fast_slot_bitmap, t->fast_ring_offset, 1); #endif } else /* typical case */ { /* Add to slow ring */ ts = &tw->w[TW_TIMER_RING_SLOW][t->slow_ring_offset]; timer_addhead (tw->timers, ts->head_index, t - tw->timers); } } } #endif #if TW_TIMER_WHEELS > 1 /* * Single odometer-click? Process a slot in the slow ring, */ if (PREDICT_FALSE (fast_wheel_index == TW_SLOTS_PER_RING)) { slow_wheel_index %= TW_SLOTS_PER_RING; ts = &tw->w[TW_TIMER_RING_SLOW][slow_wheel_index]; head = pool_elt_at_index (tw->timers, ts->head_index); next_index = head->next; /* Make slot empty */ head->next = head->prev = ts->head_index; /* traverse slot, deal timers into fast ring */ while (next_index != head - tw->timers) { t = pool_elt_at_index (tw->timers, next_index); next_index = t->next; /* Remove from sloe ring slot (hammer) */ t->next = t->prev = ~0; /* Timer expires Right Now */ if (PREDICT_FALSE (t->fast_ring_offset == 0)) { vec_add1 (callback_vector, t->user_handle); #if TW_START_STOP_TRACE_SIZE > 0 TW (tw_timer_trace) (tw, 0xfe, t->user_handle, t - tw->timers); #endif pool_put (tw->timers, t); } else /* typical case */ { /* Add to fast ring */ ts = &tw->w[TW_TIMER_RING_FAST][t->fast_ring_offset]; timer_addhead (tw->timers, ts->head_index, t - tw->timers); #if TW_FAST_WHEEL_BITMAP tw->fast_slot_bitmap = clib_bitmap_set (tw->fast_slot_bitmap, t->fast_ring_offset, 1); #endif } } } #endif /* Handle the fast ring */ fast_wheel_index %= TW_SLOTS_PER_RING; ts = &tw->w[TW_TIMER_RING_FAST][fast_wheel_index]; head = pool_elt_at_index (tw->timers, ts->head_index); next_index = head->next; /* Make slot empty */ head->next = head->prev = ts->head_index; /* Construct vector of expired timer handles to give the user */ while (next_index != ts->head_index) { t = pool_elt_at_index (tw->timers, next_index); next_index = t->next; vec_add1 (callback_vector, t->user_handle); #if TW_START_STOP_TRACE_SIZE > 0 TW (tw_timer_trace) (tw, 0xfe, t->user_handle, t - tw->timers); #endif pool_put (tw->timers, t); } /* If any timers expired, tell the user */ if (callback_vector_arg == 0 && vec_len (callback_vector)) { /* The callback is optional. We return the u32 * handle vector */ if (tw->expired_timer_callback) { tw->expired_timer_callback (callback_vector); vec_reset_length (callback_vector); } tw->expired_timer_handles = callback_vector; } #if TW_FAST_WHEEL_BITMAP tw->fast_slot_bitmap = clib_bitmap_set (tw->fast_slot_bitmap, fast_wheel_index, 0); #endif tw->current_tick++; fast_wheel_index++; tw->current_index[TW_TIMER_RING_FAST] = fast_wheel_index; #if TW_TIMER_WHEELS > 1 if (PREDICT_FALSE (fast_wheel_index == TW_SLOTS_PER_RING)) slow_wheel_index++; tw->current_index[TW_TIMER_RING_SLOW] = slow_wheel_index; #endif #if TW_TIMER_WHEELS > 2 if (PREDICT_FALSE (slow_wheel_index == TW_SLOTS_PER_RING)) glacier_wheel_index++; tw->current_index[TW_TIMER_RING_GLACIER] = glacier_wheel_index; #endif if (vec_len (callback_vector) >= tw->max_expirations) break; } if (callback_vector_arg == 0) tw->expired_timer_handles = callback_vector; tw->last_run_time += i * tw->timer_interval; return callback_vector; } __clib_export u32 *TW (tw_timer_expire_timers) (TWT (tw_timer_wheel) * tw, f64 now) { return TW (tw_timer_expire_timers_internal) (tw, now, 0 /* no vector */ ); } __clib_export u32 *TW (tw_timer_expire_timers_vec) (TWT (tw_timer_wheel) * tw, f64 now, u32 * vec) { return TW (tw_timer_expire_timers_internal) (tw, now, vec); } #if TW_FAST_WHEEL_BITMAP /** Returns an approximation to the first timer expiration in * timer-ticks from "now". To avoid wasting an unjustifiable * amount of time on the problem, we maintain an approximate fast-wheel slot * occupancy bitmap. We don't worry about clearing fast wheel bits * when timers are removed from fast wheel slots. */ __clib_export u32 TW (tw_timer_first_expires_in_ticks) (TWT (tw_timer_wheel) * tw) { u32 first_expiring_index, fast_ring_index; i32 delta; #if TW_TIMER_WHEELS > 1 fast_ring_index = tw->current_index[TW_TIMER_RING_FAST]; if (fast_ring_index == TW_SLOTS_PER_RING) return 1; first_expiring_index = clib_bitmap_next_set (tw->fast_slot_bitmap, fast_ring_index); if (first_expiring_index == ~0) first_expiring_index = TW_SLOTS_PER_RING; #else if (clib_bitmap_is_zero (tw->fast_slot_bitmap)) return TW_SLOTS_PER_RING; fast_ring_index = tw->current_index[TW_TIMER_RING_FAST]; if (fast_ring_index == TW_SLOTS_PER_RING) fast_ring_index = 0; first_expiring_index = clib_bitmap_next_set (tw->fast_slot_bitmap, fast_ring_index); if (first_expiring_index == ~0 && fast_ring_index != 0) first_expiring_index = clib_bitmap_first_set (tw->fast_slot_bitmap); #endif ASSERT (first_expiring_index != ~0); delta = (i32) first_expiring_index - (i32) fast_ring_index; if (delta < 0) delta += TW_SLOTS_PER_RING; ASSERT (delta >= 0); return (u32) delta; } #endif /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */