diff options
Diffstat (limited to 'migration')
| -rw-r--r-- | migration/dirtyrate.c | 21 | ||||
| -rw-r--r-- | migration/dirtyrate.h | 5 |
2 files changed, 26 insertions, 0 deletions
diff --git a/migration/dirtyrate.c b/migration/dirtyrate.c index 0f78aa3af7..ee47e2bc27 100644 --- a/migration/dirtyrate.c +++ b/migration/dirtyrate.c @@ -138,6 +138,18 @@ static void get_ramblock_dirty_info(RAMBlock *block, strcpy(info->idstr, qemu_ram_get_idstr(block)); } +static bool skip_sample_ramblock(RAMBlock *block) +{ + /* + * Sample only blocks larger than MIN_RAMBLOCK_SIZE. + */ + if (qemu_ram_get_used_length(block) < (MIN_RAMBLOCK_SIZE << 10)) { + return true; + } + + return false; +} + static bool record_ramblock_hash_info(struct RamblockDirtyInfo **block_dinfo, struct DirtyRateConfig config, int *block_count) @@ -150,6 +162,9 @@ static bool record_ramblock_hash_info(struct RamblockDirtyInfo **block_dinfo, bool ret = false; RAMBLOCK_FOREACH_MIGRATABLE(block) { + if (skip_sample_ramblock(block)) { + continue; + } total_count++; } @@ -159,6 +174,9 @@ static bool record_ramblock_hash_info(struct RamblockDirtyInfo **block_dinfo, } RAMBLOCK_FOREACH_MIGRATABLE(block) { + if (skip_sample_ramblock(block)) { + continue; + } if (index >= total_count) { break; } @@ -225,6 +243,9 @@ static bool compare_page_hash_info(struct RamblockDirtyInfo *info, RAMBlock *block = NULL; RAMBLOCK_FOREACH_MIGRATABLE(block) { + if (skip_sample_ramblock(block)) { + continue; + } block_dinfo = find_block_matched(block, block_count, info); if (block_dinfo == NULL) { continue; diff --git a/migration/dirtyrate.h b/migration/dirtyrate.h index 312debca6f..be5b8ec2b1 100644 --- a/migration/dirtyrate.h +++ b/migration/dirtyrate.h @@ -24,6 +24,11 @@ */ #define RAMBLOCK_INFO_MAX_LEN 256 +/* + * Minimum RAMBlock size to sample, in megabytes. + */ +#define MIN_RAMBLOCK_SIZE 128 + struct DirtyRateConfig { uint64_t sample_pages_per_gigabytes; /* sample pages per GB */ int64_t sample_period_seconds; /* time duration between two sampling */ |