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fio_plugin: poll all remaining events on thread shutdown

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There were unprocessed events in the event ring at the time
of destroying it's thread.

Polling until *done* flag is set is not sufficient. Since a single
fio_getevents call will poll only a single message, any
message positioned after the callback that sets the *done*
flag would not be processed.

Change-Id: I8fee384cb980373672bed4bc498f75774aa64a9e
Signed-off-by: Dariusz Stojaczyk <dariuszx.stojaczyk@intel.com>
Reviewed-on: https://review.gerrithub.io/385802
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
This commit is contained in:
Dariusz Stojaczyk 2017-11-06 12:00:42 +01:00 committed by Daniel Verkamp
parent 4314d72505
commit 8865e0bf51
1 changed files with 23 additions and 14 deletions
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37
examples/bdev/fio_plugin/fio_plugin.c
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@ -98,8 +98,7 @@ static bool g_spdk_env_initialized = false;
static int spdk_fio_init(struct thread_data *td);
static void spdk_fio_cleanup(struct thread_data *td);
static int spdk_fio_getevents(struct thread_data *td, unsigned int min,
unsigned int max, const struct timespec *t);
static size_t spdk_fio_poll_thread(struct spdk_fio_thread *fio_thread);
static void
spdk_fio_send_msg(spdk_thread_fn fn, void *ctx, void *thread_ctx)
@ -219,11 +218,13 @@ spdk_fio_init_thread(struct thread_data *td)
static int
spdk_fio_init_env(struct thread_data *td)
{
struct spdk_fio_thread *fio_thread;
struct spdk_fio_options *eo;
bool done = false;
int rc;
struct spdk_conf *config;
struct spdk_env_opts opts;
size_t count;
/* Parse the SPDK configuration file */
eo = td->eo;
@ -269,6 +270,8 @@ spdk_fio_init_env(struct thread_data *td)
return -1;
}
fio_thread = td->io_ops_data;
/* Initialize the copy engine */
spdk_copy_engine_initialize();
@ -277,9 +280,10 @@ spdk_fio_init_env(struct thread_data *td)
spdk_fio_start_poller,
spdk_fio_stop_poller);
while (!done) {
spdk_fio_getevents(td, 0, 128, NULL);
}
do {
/* Handle init and all cleanup events */
count = spdk_fio_poll_thread(fio_thread);
} while (!done || count > 0);
/* Destroy the temporary SPDK thread */
spdk_fio_cleanup(td);
@ -391,8 +395,6 @@ spdk_fio_cleanup(struct thread_data *td)
struct spdk_fio_thread *fio_thread = td->io_ops_data;
struct spdk_fio_target *target, *tmp;
g_thread = NULL;
TAILQ_FOREACH_SAFE(target, &fio_thread->targets, link, tmp) {
TAILQ_REMOVE(&fio_thread->targets, target, link);
spdk_put_io_channel(target->ch);
@ -400,6 +402,10 @@ spdk_fio_cleanup(struct thread_data *td)
free(target);
}
while (spdk_fio_poll_thread(fio_thread) > 0) {}
g_thread = NULL;
spdk_free_thread();
spdk_ring_free(fio_thread->ring);
free(fio_thread->iocq);
@ -665,9 +671,11 @@ spdk_fio_module_finish_done(void *cb_arg)
static void
spdk_fio_finish_env(void)
{
struct spdk_fio_thread *fio_thread;
struct thread_data *td;
int rc;
bool done = false;
size_t count;
td = calloc(1, sizeof(*td));
if (!td) {
@ -682,18 +690,19 @@ spdk_fio_finish_env(void)
return;
}
fio_thread = td->io_ops_data;
spdk_bdev_finish(spdk_fio_module_finish_done, &done);
while (!done) {
spdk_fio_getevents(td, 0, 128, NULL);
}
done = false;
do {
count = spdk_fio_poll_thread(fio_thread);
} while (!done || count > 0);
done = false;
spdk_copy_engine_finish(spdk_fio_module_finish_done, &done);
while (!done) {
spdk_fio_getevents(td, 0, 128, NULL);
}
do {
count = spdk_fio_poll_thread(fio_thread);
} while (!done || count > 0);
/* Destroy the temporary SPDK thread */
spdk_fio_cleanup(td);