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authorSirshak Das <sirshak.das@arm.com>2018-10-03 22:53:51 +0000
committerDamjan Marion <dmarion@me.com>2018-10-19 07:10:47 +0000
commit2f6d7bb93c157b874efb79a2d1583a4c368bf89a (patch)
tree05dc2867c598cbb8d711f074b4b0eb62dd464f41 /src/plugins/ioam
parentbf3443b0f852f5a4c551d12f926defbd047f2161 (diff)
vppinfra: add atomic macros for __sync builtins
This is first part of addition of atomic macros with only macros for __sync builtins. - Based on earlier patch by Damjan (https://gerrit.fd.io/r/#/c/10729/) Additionally - clib_atomic_release macro added and used in the absence of any memory barrier. - clib_atomic_bool_cmp_and_swap added Change-Id: Ie4e48c1e184a652018d1d0d87c4be80ddd180a3b Original-patch-by: Damjan Marion <damarion@cisco.com> Signed-off-by: Sirshak Das <sirshak.das@arm.com> Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com> Reviewed-by: Ola Liljedahl <ola.liljedahl@arm.com> Reviewed-by: Steve Capper <steve.capper@arm.com>
Diffstat (limited to 'src/plugins/ioam')
-rw-r--r--src/plugins/ioam/analyse/ioam_analyse.h20
-rw-r--r--src/plugins/ioam/analyse/ioam_summary_export.c4
-rw-r--r--src/plugins/ioam/analyse/ip6/node.c24
-rw-r--r--src/plugins/ioam/export-common/ioam_export.h6
4 files changed, 28 insertions, 26 deletions
diff --git a/src/plugins/ioam/analyse/ioam_analyse.h b/src/plugins/ioam/analyse/ioam_analyse.h
index 881b0451721..3aec7a792d8 100644
--- a/src/plugins/ioam/analyse/ioam_analyse.h
+++ b/src/plugins/ioam/analyse/ioam_analyse.h
@@ -191,7 +191,7 @@ ip6_ioam_analyse_set_paths_down (ioam_analyser_data_t * data)
ioam_path_map_t *path;
u8 k, i;
- while (__sync_lock_test_and_set (data->writer_lock, 1))
+ while (clib_atomic_test_and_set (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;
}
- *(data->writer_lock) = 0;
+ clib_atomic_release (data->writer_lock);
}
always_inline void
@@ -225,7 +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 (__sync_lock_test_and_set (data->writer_lock, 1))
+ while (clib_atomic_test_and_set (data->writer_lock))
;
trace_data = &data->trace_data;
@@ -277,7 +277,7 @@ ip6_ioam_analyse_hbh_trace_loopback (ioam_analyser_data_t * data,
}
}
end:
- *(data->writer_lock) = 0;
+ clib_atomic_release (data->writer_lock);
}
always_inline int
@@ -295,7 +295,7 @@ ip6_ioam_analyse_hbh_trace (ioam_analyser_data_t * data,
ioam_path_map_t *path = NULL;
ioam_analyse_trace_record *trace_record;
- while (__sync_lock_test_and_set (data->writer_lock, 1))
+ while (clib_atomic_test_and_set (data->writer_lock))
;
trace_data = &data->trace_data;
@@ -409,7 +409,7 @@ found_match:
(u32) ((sum + delay) / (data->seqno_data.rx_packets + 1));
}
DONE:
- *(data->writer_lock) = 0;
+ clib_atomic_release (data->writer_lock);
return 0;
}
@@ -417,13 +417,14 @@ always_inline int
ip6_ioam_analyse_hbh_e2e (ioam_analyser_data_t * data,
ioam_e2e_packet_t * e2e, u16 len)
{
- while (__sync_lock_test_and_set (data->writer_lock, 1))
+ while (clib_atomic_test_and_set (data->writer_lock))
;
ioam_analyze_seqno (&data->seqno_data,
(u64) clib_net_to_host_u32 (e2e->e2e_data));
- *(data->writer_lock) = 0;
+ clib_atomic_release (data->writer_lock);
+
return 0;
}
@@ -510,7 +511,8 @@ ioam_analyse_init_data (ioam_analyser_data_t * data)
data->writer_lock = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES,
CLIB_CACHE_LINE_BYTES);
- *(data->writer_lock) = 0;
+
+ clib_atomic_release (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 c118bfa3529..440dcca8369 100644
--- a/src/plugins/ioam/analyse/ioam_summary_export.c
+++ b/src/plugins/ioam/analyse/ioam_summary_export.c
@@ -150,7 +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 (__sync_lock_test_and_set (record->writer_lock, 1))
+ while (clib_atomic_test_and_set (record->writer_lock))
;
int field_index = 0;
@@ -259,7 +259,7 @@ ioam_analyse_add_ipfix_record (flow_report_t * fr,
*(record->chached_data_list) = *record;
record->chached_data_list->chached_data_list = NULL;
- *(record->writer_lock) = 0;
+ clib_atomic_release (record->writer_lock);
return offset;
}
diff --git a/src/plugins/ioam/analyse/ip6/node.c b/src/plugins/ioam/analyse/ip6/node.c
index 902fb9b09ce..7a8d71de93b 100644
--- a/src/plugins/ioam/analyse/ip6/node.c
+++ b/src/plugins/ioam/analyse/ip6/node.c
@@ -256,17 +256,17 @@ 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 (__sync_lock_test_and_set (data0->writer_lock, 1))
+ while (clib_atomic_test_and_set (data0->writer_lock))
;
data0->pkt_counter++;
data0->bytes_counter += p_len0;
- *(data0->writer_lock) = 0;
+ clib_atomic_release (data0->writer_lock);
- while (__sync_lock_test_and_set (data1->writer_lock, 1))
+ while (clib_atomic_test_and_set (data1->writer_lock))
;
data1->pkt_counter++;
data1->bytes_counter += p_len1;
- *(data1->writer_lock) = 0;
+ clib_atomic_release (data1->writer_lock);
}
else if (error0 == 0)
{
@@ -274,11 +274,11 @@ 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 (__sync_lock_test_and_set (data0->writer_lock, 1))
+ while (clib_atomic_test_and_set (data0->writer_lock))
;
data0->pkt_counter++;
data0->bytes_counter += p_len0;
- *(data0->writer_lock) = 0;
+ clib_atomic_release (data0->writer_lock);
}
else if (error1 == 0)
{
@@ -286,11 +286,11 @@ 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 (__sync_lock_test_and_set (data1->writer_lock, 1))
+ while (clib_atomic_test_and_set (data1->writer_lock))
;
data1->pkt_counter++;
data1->bytes_counter += p_len1;
- *(data1->writer_lock) = 0;
+ clib_atomic_release (data1->writer_lock);
}
else
pkts_failed += 2;
@@ -327,12 +327,12 @@ 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 (__sync_lock_test_and_set (data0->writer_lock, 1))
+ while (clib_atomic_test_and_set (data0->writer_lock))
;
data0->pkt_counter++;
data0->bytes_counter +=
clib_net_to_host_u16 (ip60->payload_length);
- *(data0->writer_lock) = 0;
+ clib_atomic_release (data0->writer_lock);
}
else
pkts_failed++;
@@ -393,13 +393,13 @@ 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 (__sync_lock_test_and_set (data->writer_lock, 1))
+ while (clib_atomic_test_and_set (data->writer_lock))
;
(0 == ret) ? (data->pot_data.sfc_validated_count++) :
(data->pot_data.sfc_invalidated_count++);
- *(data->writer_lock) = 0;
+ clib_atomic_release (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 36d71d26716..6e640951802 100644
--- a/src/plugins/ioam/export-common/ioam_export.h
+++ b/src/plugins/ioam/export-common/ioam_export.h
@@ -436,11 +436,11 @@ ioam_export_process_common (ioam_export_main_t * em, vlib_main_t * vm,
*/
for (i = 0; i < vec_len (thread_index); i++)
{
- while (__sync_lock_test_and_set (em->lockp[thread_index[i]], 1))
+ while (clib_atomic_test_and_set (em->lockp[thread_index[i]]))
;
em->buffer_per_thread[thread_index[i]] =
vec_pop (vec_buffer_indices);
- *em->lockp[thread_index[i]] = 0;
+ clib_atomic_release (em->lockp[thread_index[i]]);
}
/* Send the buffers */
@@ -479,7 +479,7 @@ do { \
from = vlib_frame_vector_args (F); \
n_left_from = (F)->n_vectors; \
next_index = (N)->cached_next_index; \
- while (__sync_lock_test_and_set ((EM)->lockp[(VM)->thread_index], 1)); \
+ while (clib_atomic_test_and_set ((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) \