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ssb: Tweak idle scheduling even more, still. Fixes -t=bench.
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Cory McWilliams
2024-12-27 15:51:33 -05:00
parent 9cddd93dad
commit 2dd32cdce2
3 changed files with 23 additions and 12 deletions
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27
src/ssb.c
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@ -17,6 +17,7 @@
#include "sodium/crypto_scalarmult_curve25519.h"
#include "sodium/crypto_secretbox.h"
#include "sodium/crypto_sign.h"
#include "sodium/randombytes.h"
#include "sodium/utils.h"
#include "sqlite3.h"
#include "uv.h"
@ -261,7 +262,7 @@ typedef struct _tf_ssb_connection_message_request_t
typedef struct _tf_ssb_connection_scheduled_t
{
char key[k_id_base64_len];
char key[128];
tf_ssb_scheduled_callback_t* callback;
void* user_data;
} tf_ssb_connection_scheduled_t;
@ -323,6 +324,7 @@ typedef struct _tf_ssb_connection_t
uint8_t secretbox_buf[k_tf_ssb_rpc_message_body_length_max];
uint32_t send_request_number;
uint64_t prng;
tf_ssb_connection_t* next;
tf_ssb_request_t* requests;
@ -592,17 +594,26 @@ static void _tf_ssb_connection_scheduled_async(uv_async_t* async)
_tf_ssb_connection_dispatch_scheduled(connection);
}
static uint32_t _tf_ssb_connection_prng(tf_ssb_connection_t* connection)
{
uint64_t seed = connection->prng * 6364136223846793005ULL + 1442695040888963407ULL;
uint32_t result = (uint32_t)((seed ^ (seed >> 22)) >> (22 + (seed >> 61)));
connection->prng = seed;
return result;
}
static void _tf_ssb_connection_dispatch_scheduled(tf_ssb_connection_t* connection)
{
while (((connection->active_write_count == 0 && connection->read_back_pressure == 0) || connection->closing) && connection->scheduled_count && connection->scheduled)
{
int index = uv_hrtime() % connection->scheduled_count;
int index = _tf_ssb_connection_prng(connection) % connection->scheduled_count;
tf_ssb_connection_scheduled_t scheduled = connection->scheduled[index];
if (index != connection->scheduled_count - 1)
{
memmove(connection->scheduled + index, connection->scheduled + index + 1, sizeof(tf_ssb_connection_scheduled_t) * (connection->scheduled_count - index - 1));
}
connection->scheduled_count--;
tf_trace_begin(connection->ssb->trace, "scheduled callback");
PRE_CALLBACK(connection->ssb, scheduled.callback);
scheduled.callback(connection, false, scheduled.user_data);
@ -623,14 +634,11 @@ void tf_ssb_connection_schedule_idle(tf_ssb_connection_t* connection, const char
int index = tf_util_insert_index(key, connection->scheduled, connection->scheduled_count, sizeof(tf_ssb_connection_scheduled_t), _tf_ssb_connection_scheduled_compare);
if (index != connection->scheduled_count && strcmp(key, connection->scheduled[index].key) == 0)
{
tf_ssb_connection_scheduled_t scheduled = connection->scheduled[index];
connection->scheduled[index].callback = callback;
connection->scheduled[index].user_data = user_data;
/* Keep the old request. Skip the new request. */
tf_trace_begin(connection->ssb->trace, "scheduled callback (skip)");
PRE_CALLBACK(connection->ssb, scheduled.callback);
scheduled.callback(connection, true, scheduled.user_data);
POST_CALLBACK(connection->ssb, scheduled.callback);
PRE_CALLBACK(connection->ssb, callback);
callback(connection, true, user_data);
POST_CALLBACK(connection->ssb, callback);
tf_trace_end(connection->ssb->trace);
}
else
@ -2728,6 +2736,7 @@ static tf_ssb_connection_t* _tf_ssb_connection_create_internal(tf_ssb_t* ssb, co
snprintf(connection->name, sizeof(connection->name), "%s%d", name, index);
connection->ssb = ssb;
connection->send_request_number = 1;
randombytes_buf(&connection->prng, sizeof(connection->prng));
connection->async.data = connection;
uv_async_init(ssb->loop, &connection->async, _tf_ssb_connection_process_message_async);