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libplugin: add spamlistcommand

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This hammers lightingd with `listinvoices` commands.

	$ VALGRIND=0 TEST_DB_PROVIDER=postgres eatmydata uv run pytest -v tests/benchmark.py::test_spam_listcommands

sqlite3:

   test_spam_listcommands     2.1193  2.4524  2.2343  0.1341  2.2229  0.1709       1;0  0.4476       5           1

PostgreSQL:

   test_spam_listcommands     6.5572  6.8440  6.7067  0.1032  6.6967  0.1063       2;0  0.1491       5           1

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2025-11-20 12:07:16 +10:30
parent ce425b465c
commit b4f17508b1
2 changed files with 33 additions and 0 deletions
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9
tests/benchmark.py
View File

@@ -218,4 +218,13 @@ def test_spam_commands(node_factory, bitcoind, benchmark):
plugin = os.path.join(os.getcwd(), "tests/plugins/test_libplugin")
l1 = get_bench_node(node_factory, extra_options={"plugin": plugin})
# This calls "batch" 1M times (which doesn't need a transaction)
benchmark(l1.rpc.spamcommand, 1_000_000)
def test_spam_listcommands(node_factory, bitcoind, benchmark):
plugin = os.path.join(os.getcwd(), "tests/plugins/test_libplugin")
l1 = get_bench_node(node_factory, extra_options={"plugin": plugin})
# This calls "listinvoice" 100,000 times (which doesn't need a transaction commit)
benchmark(l1.rpc.spamlistcommand, 100_000)

24
tests/plugins/test_libplugin.c
View File

@@ -234,6 +234,26 @@ static struct command_result *json_spamcommand(struct command *cmd,
return batch_done(cmd, batch);
}
static struct command_result *json_spamlistcommand(struct command *cmd,
const char *buf,
const jsmntok_t *params)
{
u64 *iterations;
struct request_batch *batch;
if (!param(cmd, buf, params,
p_req("iterations", param_u64, &iterations),
NULL))
return command_param_failed();
batch = request_batch_new(cmd, NULL, spam_errcb, spam_done, NULL);
for (size_t i = 0; i < *iterations; i++) {
struct out_req *req = add_to_batch(cmd, batch, "listinvoices");
send_outreq(req);
}
return batch_done(cmd, batch);
}
static char *set_dynamic(struct plugin *plugin,
const char *arg,
@@ -312,6 +332,10 @@ static const struct plugin_command commands[] = { {
"spamcommand",
json_spamcommand,
},
{
"spamlistcommand",
json_spamlistcommand,
},
};
static const char *before[] = { "dummy", NULL };