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arch_init: Alloc and free data struct for compression 

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 <liang.z.li@intel.com>
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Reviewed-by: Dr.David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Liang Li 2015-03-23 16:32:20 +08:00 committed by Juan Quintela
parent 44f0eadc33
commit 474ddaf6e3
1 changed files with 34 additions and 1 deletions
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35
arch_init.c
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@ -319,7 +319,13 @@ static uint32_t last_version;
static bool ram_bulk_stage;
struct CompressParam {
/* To be done */
bool start;
bool done;
QEMUFile *file;
QemuMutex mutex;
QemuCond cond;
RAMBlock *block;
ram_addr_t offset;
};
typedef struct CompressParam CompressParam;
@ -330,6 +336,14 @@ 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 bool quit_comp_thread;
static bool quit_decomp_thread;
static DecompressParam *decomp_param;
@ -365,11 +379,20 @@ 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)
@ -383,7 +406,17 @@ 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);
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);