LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Riccardo Mancini <rickyman7@gmail.com>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Ian Rogers <irogers@google.com>,
	Namhyung Kim <namhyung@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@redhat.com>,
	Mark Rutland <mark.rutland@arm.com>, Jiri Olsa <jolsa@redhat.com>,
	linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
	Alexey Bayduraev <alexey.v.bayduraev@linux.intel.com>,
	Riccardo Mancini <rickyman7@gmail.com>
Subject: [RFC PATCH v3 10/15] perf workqueue: create global workqueue
Date: Fri, 20 Aug 2021 12:53:56 +0200	[thread overview]
Message-ID: <f10597457f953d565515d6a885821b0ac445e89b.1629454773.git.rickyman7@gmail.com> (raw)
In-Reply-To: <cover.1629454773.git.rickyman7@gmail.com>

This patch adds a global static workqueue, using the same API from the
kernel (schedule_work, flush_scheduled_work, and so on).

Before use, the global workqueue should be set up using
setup_global_workqueue and eventually destroyed using
teardown_global_workqueue.

Signed-off-by: Riccardo Mancini <rickyman7@gmail.com>
---
 tools/perf/util/workqueue/workqueue.c |  2 ++
 tools/perf/util/workqueue/workqueue.h | 49 +++++++++++++++++++++++++++
 2 files changed, 51 insertions(+)

diff --git a/tools/perf/util/workqueue/workqueue.c b/tools/perf/util/workqueue/workqueue.c
index 305a9cda39810b84..a89370e68bd720c8 100644
--- a/tools/perf/util/workqueue/workqueue.c
+++ b/tools/perf/util/workqueue/workqueue.c
@@ -13,6 +13,8 @@
 #include <internal/lib.h>
 #include "workqueue.h"
 
+struct workqueue_struct *global_wq;
+
 enum worker_msg {
 	WORKER_MSG__UNDEFINED,
 	WORKER_MSG__READY,                          /* from worker: ack */
diff --git a/tools/perf/util/workqueue/workqueue.h b/tools/perf/util/workqueue/workqueue.h
index 37ef84fc9c6ed4b6..fc6166757f0e1d0d 100644
--- a/tools/perf/util/workqueue/workqueue.h
+++ b/tools/perf/util/workqueue/workqueue.h
@@ -5,6 +5,7 @@
 #include <stdlib.h>
 #include <sys/types.h>
 #include <linux/list.h>
+#include <linux/err.h>
 #include "threadpool.h"
 
 struct work_struct;
@@ -29,6 +30,54 @@ extern int flush_workqueue(struct workqueue_struct *wq);
 
 extern void init_work(struct work_struct *work);
 
+/* Global workqueue */
+
+extern struct workqueue_struct *global_wq;
+
+/**
+ * setup_global_wq - create the global_wq
+ */
+static inline int setup_global_workqueue(int nr_threads)
+{
+	global_wq = create_workqueue(nr_threads);
+	return IS_ERR(global_wq) ? PTR_ERR(global_wq) : 0;
+}
+
+/**
+ * teardown_global_wq - destroy the global_wq
+ */
+static inline int teardown_global_workqueue(void)
+{
+	int ret = destroy_workqueue(global_wq);
+
+	global_wq = NULL;
+	return ret;
+}
+
+/**
+ * schedule_work - queue @work on the global_wq
+ */
+static inline int schedule_work(struct work_struct *work)
+{
+	return queue_work(global_wq, work);
+}
+
+/**
+ * schedule_work - queue @work on thread @tidx of global_wq
+ */
+static inline int schedule_work_on_worker(int tidx, struct work_struct *work)
+{
+	return queue_work_on_worker(tidx, global_wq, work);
+}
+
+/**
+ * flush_scheduled_work - ensure that any scheduled work in global_wq has run to completion
+ */
+static inline int flush_scheduled_work(void)
+{
+	return flush_workqueue(global_wq);
+}
+
 #define WORKQUEUE_STRERR_BUFSIZE (128+THREADPOOL_STRERR_BUFSIZE)
 #define WORKQUEUE_ERROR__OFFSET 512
 enum {
-- 
2.31.1


  parent reply	other threads:[~2021-08-20 10:54 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-20 10:53 [RFC PATCH v3 00/15] perf: add workqueue library and use it in synthetic-events Riccardo Mancini
2021-08-20 10:53 ` [RFC PATCH v3 01/15] perf workqueue: threadpool creation and destruction Riccardo Mancini
2021-08-20 10:53 ` [RFC PATCH v3 02/15] perf tests: add test for workqueue Riccardo Mancini
2021-08-20 10:53 ` [RFC PATCH v3 03/15] perf workqueue: add threadpool start and stop functions Riccardo Mancini
2021-08-20 10:53 ` [RFC PATCH v3 04/15] perf workqueue: add threadpool execute and wait functions Riccardo Mancini
2021-08-20 10:53 ` [RFC PATCH v3 05/15] tools: add sparse context/locking annotations in compiler-types.h Riccardo Mancini
2021-08-20 10:53 ` [RFC PATCH v3 06/15] perf workqueue: introduce workqueue struct Riccardo Mancini
2021-08-24 19:27   ` Namhyung Kim
2021-08-31 16:13     ` Riccardo Mancini
2021-08-20 10:53 ` [RFC PATCH v3 07/15] perf workqueue: implement worker thread and management Riccardo Mancini
2021-08-30  7:22   ` Jiri Olsa
2021-08-20 10:53 ` [RFC PATCH v3 08/15] perf workqueue: add queue_work and flush_workqueue functions Riccardo Mancini
2021-08-24 19:40   ` Namhyung Kim
2021-08-31 16:23     ` Riccardo Mancini
2021-08-20 10:53 ` [RFC PATCH v3 09/15] perf workqueue: spinup threads when needed Riccardo Mancini
2021-08-20 10:53 ` Riccardo Mancini [this message]
2021-08-20 10:53 ` [RFC PATCH v3 11/15] perf workqueue: add utility to execute a for loop in parallel Riccardo Mancini
2021-08-20 10:53 ` [RFC PATCH v3 12/15] perf record: setup global workqueue Riccardo Mancini
2021-08-20 10:53 ` [RFC PATCH v3 13/15] perf top: " Riccardo Mancini
2021-08-20 10:54 ` [RFC PATCH v3 14/15] perf test/synthesis: " Riccardo Mancini
2021-08-20 10:54 ` [RFC PATCH v3 15/15] perf synthetic-events: use workqueue parallel_for Riccardo Mancini
2021-08-29 21:59 ` [RFC PATCH v3 00/15] perf: add workqueue library and use it in synthetic-events Jiri Olsa
2021-08-31 15:46   ` Jiri Olsa
2021-08-31 16:57     ` Riccardo Mancini

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=f10597457f953d565515d6a885821b0ac445e89b.1629454773.git.rickyman7@gmail.com \
    --to=rickyman7@gmail.com \
    --cc=acme@kernel.org \
    --cc=alexey.v.bayduraev@linux.intel.com \
    --cc=irogers@google.com \
    --cc=jolsa@redhat.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-perf-users@vger.kernel.org \
    --cc=mark.rutland@arm.com \
    --cc=mingo@redhat.com \
    --cc=namhyung@kernel.org \
    --cc=peterz@infradead.org \
    --subject='Re: [RFC PATCH v3 10/15] perf workqueue: create global workqueue' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).