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[Qemu-devel] [v8 05/14] arch_init: Alloc and free data struct for compre
From: |
Liang Li |
Subject: |
[Qemu-devel] [v8 05/14] arch_init: Alloc and free data struct for compression |
Date: |
Wed, 15 Apr 2015 17:26:14 +0800 |
Define the data structure and variables used to do multiple thread
compression, and add the code to initialize and free them.
Signed-off-by: Liang Li <address@hidden>
Signed-off-by: Yang Zhang <address@hidden>
Reviewed-by: Dr.David Alan Gilbert <address@hidden>
Reviewed-by: Juan Quintela <address@hidden>
---
arch_init.c | 37 ++++++++++++++++++++++++++++++++++++-
1 file changed, 36 insertions(+), 1 deletion(-)
diff --git a/arch_init.c b/arch_init.c
index 0c9f693..00d3a18 100644
--- a/arch_init.c
+++ b/arch_init.c
@@ -319,7 +319,14 @@ static uint32_t last_version;
static bool ram_bulk_stage;
struct CompressParam {
- /* To be done */
+ bool start;
+ bool done;
+ bool quit;
+ QEMUFile *file;
+ QemuMutex mutex;
+ QemuCond cond;
+ RAMBlock *block;
+ ram_addr_t offset;
};
typedef struct CompressParam CompressParam;
@@ -330,6 +337,14 @@ typedef struct DecompressParam DecompressParam;
static CompressParam *comp_param;
static QemuThread *compress_threads;
+/* comp_done_cond is used to wake up the migration thread when
+ * one of the compression threads has finished the compression.
+ * comp_done_lock is used to co-work with comp_done_cond.
+ */
+static QemuMutex *comp_done_lock;
+static QemuCond *comp_done_cond;
+/* The empty QEMUFileOps will be used by file in CompressParam */
+static const QEMUFileOps empty_ops = { };
static DecompressParam *decomp_param;
static QemuThread *decompress_threads;
static uint8_t *compressed_data_buf;
@@ -361,11 +376,20 @@ void migrate_compress_threads_join(void)
thread_count = migrate_compress_threads();
for (i = 0; i < thread_count; i++) {
qemu_thread_join(compress_threads + i);
+ qemu_fclose(comp_param[i].file);
+ qemu_mutex_destroy(&comp_param[i].mutex);
+ qemu_cond_destroy(&comp_param[i].cond);
}
+ qemu_mutex_destroy(comp_done_lock);
+ qemu_cond_destroy(comp_done_cond);
g_free(compress_threads);
g_free(comp_param);
+ g_free(comp_done_cond);
+ g_free(comp_done_lock);
compress_threads = NULL;
comp_param = NULL;
+ comp_done_cond = NULL;
+ comp_done_lock = NULL;
}
void migrate_compress_threads_create(void)
@@ -378,7 +402,18 @@ void migrate_compress_threads_create(void)
thread_count = migrate_compress_threads();
compress_threads = g_new0(QemuThread, thread_count);
comp_param = g_new0(CompressParam, thread_count);
+ comp_done_cond = g_new0(QemuCond, 1);
+ comp_done_lock = g_new0(QemuMutex, 1);
+ qemu_cond_init(comp_done_cond);
+ qemu_mutex_init(comp_done_lock);
for (i = 0; i < thread_count; i++) {
+ /* com_param[i].file is just used as a dummy buffer to save data, set
+ * it's ops to empty.
+ */
+ comp_param[i].file = qemu_fopen_ops(NULL, &empty_ops);
+ comp_param[i].done = true;
+ qemu_mutex_init(&comp_param[i].mutex);
+ qemu_cond_init(&comp_param[i].cond);
qemu_thread_create(compress_threads + i, "compress",
do_data_compress, comp_param + i,
QEMU_THREAD_JOINABLE);
--
1.9.1
- [Qemu-devel] [PATCH v8 0/14] migration: Add a new feature to do live migration, Liang Li, 2015/04/15
- [Qemu-devel] [v8 01/14] docs: Add a doc about multiple thread compression, Liang Li, 2015/04/15
- [Qemu-devel] [v8 02/14] migration: Add the framework of multi-thread compression, Liang Li, 2015/04/15
- [Qemu-devel] [v8 04/14] qemu-file: Add compression functions to QEMUFile, Liang Li, 2015/04/15
- [Qemu-devel] [v8 05/14] arch_init: Alloc and free data struct for compression,
Liang Li <=
- [Qemu-devel] [v8 03/14] migration: Add the framework of multi-thread decompression, Liang Li, 2015/04/15
- [Qemu-devel] [v8 06/14] arch_init: Add and free data struct for decompression, Liang Li, 2015/04/15
- [Qemu-devel] [v8 08/14] migration: Add the core code of multi-thread compression, Liang Li, 2015/04/15
- [Qemu-devel] [v8 07/14] migration: Split save_zero_page from ram_save_page, Liang Li, 2015/04/15
- [Qemu-devel] [v8 10/14] migration: Add the core code for decompression, Liang Li, 2015/04/15
- [Qemu-devel] [v8 09/14] migration: Make compression co-work with xbzrle, Liang Li, 2015/04/15
- [Qemu-devel] [v8 11/14] migration: Add interface to control compression, Liang Li, 2015/04/15
- [Qemu-devel] [v8 12/14] migration: Use an array instead of 3 parameters, Liang Li, 2015/04/15
- [Qemu-devel] [v8 13/14] migration: Add qmp commands to set and query parameters, Liang Li, 2015/04/15
- [Qemu-devel] [v8 14/14] migration: Add hmp interface to set and query parameters, Liang Li, 2015/04/15