From: David Marchand <david.marchand@redhat.com>
To: dev@dpdk.org
Cc: probb@iol.unh.edu, "Morten Brørup" <mb@smartsharesystems.com>,
"Thomas Monjalon" <thomas@monjalon.net>,
"Ferruh Yigit" <ferruh.yigit@amd.com>,
"Andrew Rybchenko" <andrew.rybchenko@oktetlabs.ru>,
"Anatoly Burakov" <anatoly.burakov@intel.com>
Subject: [PATCH v2 2/2] ethdev: cleanup shared data with the last port
Date: Fri, 18 Aug 2023 15:41:24 +0200 [thread overview]
Message-ID: <20230818134124.2478945-3-david.marchand@redhat.com> (raw)
In-Reply-To: <20230818134124.2478945-1-david.marchand@redhat.com>
If no port is allocated, ethdev (from a primary process) can release the
memzone used to store port data.
This makes it possible for the DPDK memory allocator to release
associated resources back to the OS.
Signed-off-by: David Marchand <david.marchand@redhat.com>
Acked-by: Morten Brørup <mb@smartsharesystems.com>
---
lib/ethdev/ethdev_driver.c | 7 +++++++
lib/ethdev/ethdev_private.c | 16 +++++++++++++++-
lib/ethdev/ethdev_private.h | 3 +++
3 files changed, 25 insertions(+), 1 deletion(-)
diff --git a/lib/ethdev/ethdev_driver.c b/lib/ethdev/ethdev_driver.c
index 5bb9c3f97c..340e448c1d 100644
--- a/lib/ethdev/ethdev_driver.c
+++ b/lib/ethdev/ethdev_driver.c
@@ -113,6 +113,8 @@ rte_eth_dev_allocate(const char *name)
eth_dev->data->backer_port_id = RTE_MAX_ETHPORTS;
eth_dev->data->mtu = RTE_ETHER_MTU;
pthread_mutex_init(ð_dev->data->flow_ops_mutex, NULL);
+ RTE_ASSERT(rte_eal_process_type() == RTE_PROC_PRIMARY);
+ eth_dev_shared_data->allocated_count++;
unlock:
rte_spinlock_unlock(rte_mcfg_ethdev_get_lock());
@@ -253,6 +255,11 @@ rte_eth_dev_release_port(struct rte_eth_dev *eth_dev)
rte_free(eth_dev->data->dev_private);
pthread_mutex_destroy(ð_dev->data->flow_ops_mutex);
memset(eth_dev->data, 0, sizeof(struct rte_eth_dev_data));
+ eth_dev->data = NULL;
+
+ eth_dev_shared_data->allocated_count--;
+ if (eth_dev_shared_data->allocated_count == 0)
+ eth_dev_shared_data_release();
}
rte_spinlock_unlock(rte_mcfg_ethdev_get_lock());
diff --git a/lib/ethdev/ethdev_private.c b/lib/ethdev/ethdev_private.c
index 6756625729..6fe2e37c56 100644
--- a/lib/ethdev/ethdev_private.c
+++ b/lib/ethdev/ethdev_private.c
@@ -11,6 +11,7 @@
static const char *MZ_RTE_ETH_DEV_DATA = "rte_eth_dev_data";
+static const struct rte_memzone *eth_dev_shared_mz;
struct eth_dev_shared *eth_dev_shared_data;
/* spinlock for eth device callbacks */
@@ -324,7 +325,7 @@ eth_dev_shared_data_prepare(void)
const unsigned int flags = 0;
const struct rte_memzone *mz;
- if (eth_dev_shared_data == NULL) {
+ if (eth_dev_shared_mz == NULL) {
if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
/* Allocate port data and ownership shared memory. */
mz = rte_memzone_reserve(MZ_RTE_ETH_DEV_DATA,
@@ -335,16 +336,29 @@ eth_dev_shared_data_prepare(void)
if (mz == NULL)
rte_panic("Cannot allocate ethdev shared data\n");
+ eth_dev_shared_mz = mz;
eth_dev_shared_data = mz->addr;
if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
eth_dev_shared_data->next_owner_id =
RTE_ETH_DEV_NO_OWNER + 1;
+ eth_dev_shared_data->allocated_count = 0;
memset(eth_dev_shared_data->data, 0,
sizeof(eth_dev_shared_data->data));
}
}
}
+void
+eth_dev_shared_data_release(void)
+{
+ RTE_ASSERT(rte_eal_process_type() == RTE_PROC_PRIMARY);
+ if (eth_dev_shared_mz != NULL) {
+ rte_memzone_free(eth_dev_shared_mz);
+ eth_dev_shared_mz = NULL;
+ eth_dev_shared_data = NULL;
+ }
+}
+
void
eth_dev_rxq_release(struct rte_eth_dev *dev, uint16_t qid)
{
diff --git a/lib/ethdev/ethdev_private.h b/lib/ethdev/ethdev_private.h
index f7706e6a95..c456ba9a50 100644
--- a/lib/ethdev/ethdev_private.h
+++ b/lib/ethdev/ethdev_private.h
@@ -15,6 +15,7 @@
struct eth_dev_shared {
uint64_t next_owner_id;
+ uint64_t allocated_count;
struct rte_eth_dev_data data[RTE_MAX_ETHPORTS];
};
@@ -69,6 +70,8 @@ void eth_dev_fp_ops_setup(struct rte_eth_fp_ops *fpo,
void eth_dev_shared_data_prepare(void)
__rte_exclusive_locks_required(rte_mcfg_ethdev_get_lock());
+void eth_dev_shared_data_release(void)
+ __rte_exclusive_locks_required(rte_mcfg_ethdev_get_lock());
void eth_dev_rxq_release(struct rte_eth_dev *dev, uint16_t qid);
void eth_dev_txq_release(struct rte_eth_dev *dev, uint16_t qid);
--
2.41.0
next prev parent reply other threads:[~2023-08-18 13:41 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-18 9:13 [PATCH 0/2] Release ethdev shared memory on port cleanup David Marchand
2023-08-18 9:13 ` [PATCH 1/2] ethdev: protect shared memory accesses under one lock David Marchand
2023-08-18 9:13 ` [PATCH 2/2] ethdev: cleanup shared data with the last port David Marchand
2023-08-18 11:36 ` David Marchand
2023-08-18 10:18 ` [PATCH 0/2] Release ethdev shared memory on port cleanup Morten Brørup
2023-08-31 15:34 ` Thomas Monjalon
2023-08-18 13:41 ` [PATCH v2 " David Marchand
2023-08-18 13:41 ` [PATCH v2 1/2] ethdev: protect shared memory accesses under one lock David Marchand
2023-08-18 13:41 ` David Marchand [this message]
2023-08-21 8:58 ` [PATCH v3 0/3] Release ethdev shared memory on port cleanup David Marchand
2023-08-21 8:58 ` [PATCH v3 1/3] ethdev: protect shared memory accesses under one lock David Marchand
2023-08-21 8:58 ` [PATCH v3 2/3] ethdev: avoid panicking in absence of ethdev shared data David Marchand
2023-08-21 8:58 ` [PATCH v3 3/3] ethdev: cleanup shared data with the last port David Marchand
2023-08-31 16:05 ` [PATCH v3 0/3] Release ethdev shared memory on port cleanup Thomas Monjalon
2023-09-01 7:32 ` David Marchand
2023-09-27 11:45 ` [PATCH v4 " David Marchand
2023-09-27 11:45 ` [PATCH v4 1/3] ethdev: protect shared memory accesses under one lock David Marchand
2023-09-27 11:45 ` [PATCH v4 2/3] ethdev: avoid panicking in absence of ethdev shared data David Marchand
2023-09-27 11:45 ` [PATCH v4 3/3] ethdev: cleanup shared data with the last port David Marchand
2023-10-11 12:53 ` [PATCH v4 0/3] Release ethdev shared memory on port cleanup Thomas Monjalon
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=20230818134124.2478945-3-david.marchand@redhat.com \
--to=david.marchand@redhat.com \
--cc=anatoly.burakov@intel.com \
--cc=andrew.rybchenko@oktetlabs.ru \
--cc=dev@dpdk.org \
--cc=ferruh.yigit@amd.com \
--cc=mb@smartsharesystems.com \
--cc=probb@iol.unh.edu \
--cc=thomas@monjalon.net \
/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
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
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).