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[Qemu-devel] [PATCH v4 10/12] migration: create a dedicated thread to re
From: |
Lidong Chen |
Subject: |
[Qemu-devel] [PATCH v4 10/12] migration: create a dedicated thread to release rdma resource |
Date: |
Wed, 30 May 2018 17:43:34 +0800 |
ibv_dereg_mr wait for a long time for big memory size virtual server.
The test result is:
10GB 326ms
20GB 699ms
30GB 1021ms
40GB 1387ms
50GB 1712ms
60GB 2034ms
70GB 2457ms
80GB 2807ms
90GB 3107ms
100GB 3474ms
110GB 3735ms
120GB 4064ms
130GB 4567ms
140GB 4886ms
this will cause the guest os hang for a while when migration finished.
So create a dedicated thread to release rdma resource.
Signed-off-by: Lidong Chen <address@hidden>
---
migration/rdma.c | 21 +++++++++++++++++----
1 file changed, 17 insertions(+), 4 deletions(-)
diff --git a/migration/rdma.c b/migration/rdma.c
index dfa4f77..1b9e261 100644
--- a/migration/rdma.c
+++ b/migration/rdma.c
@@ -2979,12 +2979,12 @@ static void
qio_channel_rdma_set_aio_fd_handler(QIOChannel *ioc,
}
}
-static int qio_channel_rdma_close(QIOChannel *ioc,
- Error **errp)
+static void *qio_channel_rdma_close_thread(void *arg)
{
- QIOChannelRDMA *rioc = QIO_CHANNEL_RDMA(ioc);
+ QIOChannelRDMA *rioc = arg;
RDMAContext *rdmain, *rdmaout;
- trace_qemu_rdma_close();
+
+ rcu_register_thread();
rdmain = rioc->rdmain;
if (rdmain) {
@@ -3009,6 +3009,19 @@ static int qio_channel_rdma_close(QIOChannel *ioc,
g_free(rdmain);
g_free(rdmaout);
+ rcu_unregister_thread();
+ return NULL;
+}
+
+static int qio_channel_rdma_close(QIOChannel *ioc,
+ Error **errp)
+{
+ QemuThread t;
+ QIOChannelRDMA *rioc = QIO_CHANNEL_RDMA(ioc);
+ trace_qemu_rdma_close();
+
+ qemu_thread_create(&t, "rdma cleanup", qio_channel_rdma_close_thread,
+ rioc, QEMU_THREAD_DETACHED);
return 0;
}
--
1.8.3.1
- Re: [Qemu-devel] [PATCH v4 04/12] migration: avoid concurrent invoke channel_close by different threads, (continued)
- [Qemu-devel] [PATCH v4 06/12] migration: Stop rdma yielding during incoming postcopy, Lidong Chen, 2018/05/30
- [Qemu-devel] [PATCH v4 05/12] migration: implement bi-directional RDMA QIOChannel, Lidong Chen, 2018/05/30
- [Qemu-devel] [PATCH v4 07/12] migration: not wait RDMA_CM_EVENT_DISCONNECTED event after rdma_disconnect, Lidong Chen, 2018/05/30
- [Qemu-devel] [PATCH v4 08/12] migration: implement io_set_aio_fd_handler function for RDMA QIOChannel, Lidong Chen, 2018/05/30
- [Qemu-devel] [PATCH v4 09/12] migration: invoke qio_channel_yield only when qemu_in_coroutine(), Lidong Chen, 2018/05/30
- [Qemu-devel] [PATCH v4 11/12] migration: poll the cm event while wait RDMA work request completion, Lidong Chen, 2018/05/30
- [Qemu-devel] [PATCH v4 10/12] migration: create a dedicated thread to release rdma resource,
Lidong Chen <=
[Qemu-devel] [PATCH v4 12/12] migration: implement the shutdown for RDMA QIOChannel, Lidong Chen, 2018/05/30