diff options
Diffstat (limited to 'block.c')
| -rw-r--r-- | block.c | 19 |
1 files changed, 9 insertions, 10 deletions
@@ -140,7 +140,6 @@ void bdrv_io_limits_disable(BlockDriverState *bs) bs->slice_start = 0; bs->slice_end = 0; - bs->slice_time = 0; } static void bdrv_block_timer(void *opaque) @@ -1432,7 +1431,6 @@ static void bdrv_move_feature_fields(BlockDriverState *bs_dest, bs_dest->enable_write_cache = bs_src->enable_write_cache; /* i/o timing parameters */ - bs_dest->slice_time = bs_src->slice_time; bs_dest->slice_start = bs_src->slice_start; bs_dest->slice_end = bs_src->slice_end; bs_dest->slice_submitted = bs_src->slice_submitted; @@ -3749,6 +3747,7 @@ static bool bdrv_exceed_bps_limits(BlockDriverState *bs, int nb_sectors, bool is_write, double elapsed_time, uint64_t *wait) { uint64_t bps_limit = 0; + uint64_t extension; double bytes_limit, bytes_base, bytes_res; double slice_time, wait_time; @@ -3796,8 +3795,10 @@ static bool bdrv_exceed_bps_limits(BlockDriverState *bs, int nb_sectors, * info can be kept until the timer fire, so it is increased and tuned * based on the result of experiment. */ - bs->slice_time = wait_time * BLOCK_IO_SLICE_TIME * 10; - bs->slice_end += bs->slice_time - 3 * BLOCK_IO_SLICE_TIME; + extension = wait_time * NANOSECONDS_PER_SECOND; + extension = DIV_ROUND_UP(extension, BLOCK_IO_SLICE_TIME) * + BLOCK_IO_SLICE_TIME; + bs->slice_end += extension; if (wait) { *wait = wait_time * BLOCK_IO_SLICE_TIME * 10; } @@ -3848,8 +3849,8 @@ static bool bdrv_exceed_iops_limits(BlockDriverState *bs, bool is_write, wait_time = 0; } - bs->slice_time = wait_time * BLOCK_IO_SLICE_TIME * 10; - bs->slice_end += bs->slice_time - 3 * BLOCK_IO_SLICE_TIME; + /* Exceeded current slice, extend it by another slice time */ + bs->slice_end += BLOCK_IO_SLICE_TIME; if (wait) { *wait = wait_time * BLOCK_IO_SLICE_TIME * 10; } @@ -3868,12 +3869,10 @@ static bool bdrv_exceed_io_limits(BlockDriverState *bs, int nb_sectors, now = qemu_get_clock_ns(vm_clock); if ((bs->slice_start < now) && (bs->slice_end > now)) { - bs->slice_end = now + bs->slice_time; + bs->slice_end = now + BLOCK_IO_SLICE_TIME; } else { - bs->slice_time = 5 * BLOCK_IO_SLICE_TIME; bs->slice_start = now; - bs->slice_end = now + bs->slice_time; - + bs->slice_end = now + BLOCK_IO_SLICE_TIME; memset(&bs->slice_submitted, 0, sizeof(bs->slice_submitted)); } |