From 5cdde5c25a0e71d923a6d56e5c94e058887f95d8 Mon Sep 17 00:00:00 2001 From: jaszha03 Date: Thu, 11 Jul 2019 20:47:24 +0000 Subject: vppinfra: refactor test_and_set spinlocks to use clib_spinlock_t Spinlock performance improved when implemented with compare_and_exchange instead of test_and_set. All instances of test_and_set locks were refactored to use clib_spinlock_t when possible. Some locks e.g. ssvm synchronize between processes rather than threads, so they cannot directly use clib_spinlock_t. Type: refactor Change-Id: Ia16b5d4cd49209b2b57b8df6c94615c28b11bb60 Signed-off-by: Jason Zhang Reviewed-by: Honnappa Nagarahalli Reviewed-by: Lijian Zhang --- src/plugins/ioam/analyse/ioam_analyse.h | 28 ++++++++++-------------- src/plugins/ioam/analyse/ioam_summary_export.c | 5 ++--- src/plugins/ioam/analyse/ip6/node.c | 30 +++++++++++--------------- src/plugins/ioam/export-common/ioam_export.h | 18 +++++++--------- 4 files changed, 33 insertions(+), 48 deletions(-) (limited to 'src/plugins/ioam') diff --git a/src/plugins/ioam/analyse/ioam_analyse.h b/src/plugins/ioam/analyse/ioam_analyse.h index 3aec7a792d8..2a2cc15823f 100644 --- a/src/plugins/ioam/analyse/ioam_analyse.h +++ b/src/plugins/ioam/analyse/ioam_analyse.h @@ -22,6 +22,7 @@ #include #include #include +#include #define IOAM_FLOW_TEMPLATE_ID 260 #define IOAM_TRACE_MAX_NODES 10 @@ -123,7 +124,7 @@ typedef struct ioam_analyser_data_t_ struct ioam_analyser_data_t_ *chached_data_list; /** Lock to since we use this to export the data in other thread. */ - volatile u32 *writer_lock; + clib_spinlock_t writer_lock; } ioam_analyser_data_t; always_inline f64 @@ -191,8 +192,7 @@ ip6_ioam_analyse_set_paths_down (ioam_analyser_data_t * data) ioam_path_map_t *path; u8 k, i; - while (clib_atomic_test_and_set (data->writer_lock)) - ; + clib_spinlock_lock (&data->writer_lock); trace_data = &data->trace_data; @@ -208,7 +208,7 @@ ip6_ioam_analyse_set_paths_down (ioam_analyser_data_t * data) for (k = 0; k < trace_record->num_nodes; k++) path[k].state_up = 0; } - clib_atomic_release (data->writer_lock); + clib_spinlock_unlock (&data->writer_lock); } always_inline void @@ -225,8 +225,7 @@ ip6_ioam_analyse_hbh_trace_loopback (ioam_analyser_data_t * data, u16 size_of_traceopt_per_node; u16 size_of_all_traceopts; - while (clib_atomic_test_and_set (data->writer_lock)) - ; + clib_spinlock_lock (&data->writer_lock); trace_data = &data->trace_data; @@ -277,7 +276,7 @@ ip6_ioam_analyse_hbh_trace_loopback (ioam_analyser_data_t * data, } } end: - clib_atomic_release (data->writer_lock); + clib_spinlock_unlock (&data->writer_lock); } always_inline int @@ -295,8 +294,7 @@ ip6_ioam_analyse_hbh_trace (ioam_analyser_data_t * data, ioam_path_map_t *path = NULL; ioam_analyse_trace_record *trace_record; - while (clib_atomic_test_and_set (data->writer_lock)) - ; + clib_spinlock_lock (&data->writer_lock); trace_data = &data->trace_data; @@ -409,7 +407,7 @@ found_match: (u32) ((sum + delay) / (data->seqno_data.rx_packets + 1)); } DONE: - clib_atomic_release (data->writer_lock); + clib_spinlock_unlock (&data->writer_lock); return 0; } @@ -417,13 +415,12 @@ always_inline int ip6_ioam_analyse_hbh_e2e (ioam_analyser_data_t * data, ioam_e2e_packet_t * e2e, u16 len) { - while (clib_atomic_test_and_set (data->writer_lock)) - ; + clib_spinlock_lock (&data->writer_lock); ioam_analyze_seqno (&data->seqno_data, (u64) clib_net_to_host_u32 (e2e->e2e_data)); - clib_atomic_release (data->writer_lock); + clib_spinlock_unlock (&data->writer_lock); return 0; } @@ -509,10 +506,7 @@ ioam_analyse_init_data (ioam_analyser_data_t * data) * get extended in future to maintain history of data */ vec_validate_aligned (data->chached_data_list, 0, CLIB_CACHE_LINE_BYTES); - data->writer_lock = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES, - CLIB_CACHE_LINE_BYTES); - - clib_atomic_release (data->writer_lock); + clib_spinlock_init (&data->writer_lock); trace_data = &(data->trace_data); for (j = 0; j < IOAM_MAX_PATHS_PER_FLOW; j++) diff --git a/src/plugins/ioam/analyse/ioam_summary_export.c b/src/plugins/ioam/analyse/ioam_summary_export.c index 4851491012b..12907d8c54b 100644 --- a/src/plugins/ioam/analyse/ioam_summary_export.c +++ b/src/plugins/ioam/analyse/ioam_summary_export.c @@ -150,8 +150,7 @@ ioam_analyse_add_ipfix_record (flow_report_t * fr, ip6_address_t * src, ip6_address_t * dst, u16 src_port, u16 dst_port) { - while (clib_atomic_test_and_set (record->writer_lock)) - ; + clib_spinlock_lock (&record->writer_lock); int field_index = 0; u16 tmp; @@ -259,7 +258,7 @@ ioam_analyse_add_ipfix_record (flow_report_t * fr, *(record->chached_data_list) = *record; record->chached_data_list->chached_data_list = NULL; - clib_atomic_release (record->writer_lock); + clib_spinlock_unlock (&record->writer_lock); return offset; } diff --git a/src/plugins/ioam/analyse/ip6/node.c b/src/plugins/ioam/analyse/ip6/node.c index 7a8d71de93b..2568e305b39 100644 --- a/src/plugins/ioam/analyse/ip6/node.c +++ b/src/plugins/ioam/analyse/ip6/node.c @@ -256,17 +256,15 @@ ip6_ioam_analyse_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, data0 = ioam_analyse_get_data_from_flow_id (flow_id0); data1 = ioam_analyse_get_data_from_flow_id (flow_id1); - while (clib_atomic_test_and_set (data0->writer_lock)) - ; + clib_spinlock_lock (&data0->writer_lock); data0->pkt_counter++; data0->bytes_counter += p_len0; - clib_atomic_release (data0->writer_lock); + clib_spinlock_unlock (&data0->writer_lock); - while (clib_atomic_test_and_set (data1->writer_lock)) - ; + clib_spinlock_lock (&data1->writer_lock); data1->pkt_counter++; data1->bytes_counter += p_len1; - clib_atomic_release (data1->writer_lock); + clib_spinlock_unlock (&data1->writer_lock); } else if (error0 == 0) { @@ -274,11 +272,10 @@ ip6_ioam_analyse_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, pkts_failed++; data0 = ioam_analyse_get_data_from_flow_id (flow_id0); - while (clib_atomic_test_and_set (data0->writer_lock)) - ; + clib_spinlock_lock (&data0->writer_lock); data0->pkt_counter++; data0->bytes_counter += p_len0; - clib_atomic_release (data0->writer_lock); + clib_spinlock_unlock (&data0->writer_lock); } else if (error1 == 0) { @@ -286,11 +283,10 @@ ip6_ioam_analyse_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, pkts_failed++; data1 = ioam_analyse_get_data_from_flow_id (flow_id1); - while (clib_atomic_test_and_set (data1->writer_lock)) - ; + clib_spinlock_lock (&data1->writer_lock); data1->pkt_counter++; data1->bytes_counter += p_len1; - clib_atomic_release (data1->writer_lock); + clib_spinlock_unlock (&data1->writer_lock); } else pkts_failed += 2; @@ -327,12 +323,11 @@ ip6_ioam_analyse_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, { pkts_analysed++; data0 = ioam_analyse_get_data_from_flow_id (flow_id0); - while (clib_atomic_test_and_set (data0->writer_lock)) - ; + clib_spinlock_lock (&data0->writer_lock); data0->pkt_counter++; data0->bytes_counter += clib_net_to_host_u16 (ip60->payload_length); - clib_atomic_release (data0->writer_lock); + clib_spinlock_unlock (&data0->writer_lock); } else pkts_failed++; @@ -393,13 +388,12 @@ ip6_ioam_analyse_hbh_pot (u32 flow_id, ip6_hop_by_hop_option_t * opt0, pot_profile = pot_profile_get_active (); ret = pot_validate (pot_profile, cumulative, random); - while (clib_atomic_test_and_set (data->writer_lock)) - ; + clib_spinlock_lock (&data->writer_lock); (0 == ret) ? (data->pot_data.sfc_validated_count++) : (data->pot_data.sfc_invalidated_count++); - clib_atomic_release (data->writer_lock); + clib_spinlock_unlock (&data->writer_lock); return 0; } diff --git a/src/plugins/ioam/export-common/ioam_export.h b/src/plugins/ioam/export-common/ioam_export.h index 672576ebded..b1bca9bf91f 100644 --- a/src/plugins/ioam/export-common/ioam_export.h +++ b/src/plugins/ioam/export-common/ioam_export.h @@ -28,6 +28,7 @@ #include #include #include +#include #include @@ -62,7 +63,7 @@ typedef struct /* Vector of per thread ioam_export_buffer_t to buffer pool index */ u32 *buffer_per_thread; /* Lock per thread to swap buffers between worker and timer process */ - volatile u32 **lockp; + clib_spinlock_t *lockp; /* time scale transform */ u32 unix_time_0; @@ -194,9 +195,7 @@ ioam_export_thread_buffer_init (ioam_export_main_t * em, vlib_main_t * vm) ioam_export_thread_buffer_free (em); return (-2); } - em->lockp[i] = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES, - CLIB_CACHE_LINE_BYTES); - clib_memset ((void *) em->lockp[i], 0, CLIB_CACHE_LINE_BYTES); + clib_spinlock_init (&em->lockp[i]); } return (1); } @@ -404,7 +403,7 @@ ioam_export_process_common (ioam_export_main_t * em, vlib_main_t * vm, for (i = 0; i < vec_len (em->buffer_per_thread); i++) { /* If the worker thread is processing export records ignore further checks */ - if (*em->lockp[i] == 1) + if (CLIB_SPINLOCK_IS_LOCKED (&em->lockp[i])) continue; eb = pool_elt_at_index (em->buffer_pool, em->buffer_per_thread[i]); if (eb->records_in_this_buffer > 0 @@ -436,11 +435,10 @@ ioam_export_process_common (ioam_export_main_t * em, vlib_main_t * vm, */ for (i = 0; i < vec_len (thread_index); i++) { - while (clib_atomic_test_and_set (em->lockp[thread_index[i]])) - ; + clib_spinlock_lock (&em->lockp[thread_index[i]]); em->buffer_per_thread[thread_index[i]] = vec_pop (vec_buffer_indices); - clib_atomic_release (em->lockp[thread_index[i]]); + clib_spinlock_unlock (&em->lockp[thread_index[i]]); } /* Send the buffers */ @@ -479,7 +477,7 @@ do { \ from = vlib_frame_vector_args (F); \ n_left_from = (F)->n_vectors; \ next_index = (N)->cached_next_index; \ - while (clib_atomic_test_and_set ((EM)->lockp[(VM)->thread_index])); \ + clib_spinlock_lock (&(EM)->lockp[(VM)->thread_index]); \ my_buf = ioam_export_get_my_buffer (EM, (VM)->thread_index); \ my_buf->touched_at = vlib_time_now (VM); \ while (n_left_from > 0) \ @@ -622,7 +620,7 @@ do { \ } \ vlib_node_increment_counter (VM, export_node.index, \ EXPORT_ERROR_RECORDED, pkts_recorded); \ - *(EM)->lockp[(VM)->thread_index] = 0; \ + clib_spinlock_unlock (&(EM)->lockp[(VM)->thread_index]); \ } while(0) #endif /* __included_ioam_export_h__ */ -- cgit 1.2.3-korg