my code is on master commit f5667c3055dbd6755277f085c6778c2b1104aa6e
in stat_segment.c: stat_validate_counter_vector(), create two dimension:
*counter[thread_num][max]
*
--------------------------------------------------------------------------------------------------
static void
stat_validate_counter_vector ( stat_segment_directory_entry_t * ep , u32 max )
{
stat_segment_main_t *sm = &stat_segment_main;
stat_segment_shared_header_t *shared_header = sm -> shared_header ;
counter_t **counters = 0 ;
vlib_thread_main_t *tm = vlib_get_thread_main ();
int i;
u64 *offset_vector = 0 ;
vec_validate_aligned (counters, tm -> n_vlib_mains - 1 ,
CLIB_CACHE_LINE_BYTES);
for (i = 0 ; i < tm -> n_vlib_mains ; i++)
{
vec_validate_aligned ( counters [i], max, CLIB_CACHE_LINE_BYTES);
vec_add1 (offset_vector,
stat_segment_offset (shared_header, counters [i]));
}
ep -> offset = stat_segment_offset (shared_header, counters);
ep -> offset_vector = stat_segment_offset (shared_header, offset_vector);
}
*but in* *do_stat_segment_updates(),* access counter by counter [max]
*[thread_num], this lead to unpredict behavior, like man thread hang on.*
for (i = start; i < vec_len (vlib_mains); i++)
{
f64 this_vector_rate;
this_vlib_main = vlib_mains [i];
this_vector_rate = vlib_last_vector_length_per_node (this_vlib_main);
vector_rate += this_vector_rate;
/* Set the per-worker rate */
counters [ 0 ][i - start] = this_vector_rate;
}
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