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| author | Fam Zheng <zhengfeiran@bytedance.com> | 2019-08-28 11:54:53 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-09-06 14:33:52 -0600 |
| commit | 795fe54c2a828099e461e8c36b04210b2df462ed (patch) | |
| tree | 8b35881273bccb732e50632af0b9146fe23a9b58 /block/bfq-iosched.h | |
| parent | 5ff047e32812f57c13389c4a9cdb1427620b3a6f (diff) | |
| download | linux-795fe54c2a828099e461e8c36b04210b2df462ed.tar.bz2 | |
bfq: Add per-device weight
This adds to BFQ the missing per-device weight interfaces:
blkio.bfq.weight_device on legacy and io.bfq.weight on unified. The
implementation pretty closely resembles what we had in CFQ and the parsing code
is basically reused.
Tests
=====
Using two cgroups and three block devices, having weights setup as:
Cgroup test1 test2
============================================
default 100 500
sda 500 100
sdb default default
sdc 200 200
cgroup v1 runs
--------------
sda.test1.out: READ: bw=913MiB/s
sda.test2.out: READ: bw=183MiB/s
sdb.test1.out: READ: bw=213MiB/s
sdb.test2.out: READ: bw=1054MiB/s
sdc.test1.out: READ: bw=650MiB/s
sdc.test2.out: READ: bw=650MiB/s
cgroup v2 runs
--------------
sda.test1.out: READ: bw=915MiB/s
sda.test2.out: READ: bw=184MiB/s
sdb.test1.out: READ: bw=216MiB/s
sdb.test2.out: READ: bw=1069MiB/s
sdc.test1.out: READ: bw=621MiB/s
sdc.test2.out: READ: bw=622MiB/s
Signed-off-by: Fam Zheng <zhengfeiran@bytedance.com>
Acked-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/bfq-iosched.h')
| -rw-r--r-- | block/bfq-iosched.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/block/bfq-iosched.h b/block/bfq-iosched.h index e80adf822bbe..5d1a519640f6 100644 --- a/block/bfq-iosched.h +++ b/block/bfq-iosched.h @@ -168,6 +168,9 @@ struct bfq_entity { /* budget, used also to calculate F_i: F_i = S_i + @budget / @weight */ int budget; + /* device weight, if non-zero, it overrides the default weight of + * bfq_group_data */ + int dev_weight; /* weight of the queue */ int weight; /* next weight if a change is in progress */ |