== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:47:35 (1789480055)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.6175 s, 6.7 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff9dcc6049d800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.329149
Iter 1/10: OSS cache speed: 0.352594
Iter 1/10: ladvise speed: 0.392397
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.299906
Iter 2/10: OSS cache speed: 0.353777
Iter 2/10: ladvise speed: 0.416795
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.38622
Iter 3/10: OSS cache speed: 0.449808
Iter 3/10: ladvise speed: 0.436233
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.454598
Iter 4/10: OSS cache speed: 0.535055
Iter 4/10: ladvise speed: 0.53724
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.500947
Iter 5/10: OSS cache speed: 0.559775
Iter 5/10: ladvise speed: 0.561448
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.568573
Iter 6/10: OSS cache speed: 0.611702
Iter 6/10: ladvise speed: 0.628314
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.567697
Iter 7/10: OSS cache speed: 0.623048
Iter 7/10: ladvise speed: 0.673867
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.580317
Iter 8/10: OSS cache speed: 0.647288
Iter 8/10: ladvise speed: 0.710059
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.275809
Iter 9/10: OSS cache speed: 0.301018
Iter 9/10: ladvise speed: 0.452904
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.353489
Iter 10/10: OSS cache speed: 0.47037
Iter 10/10: ladvise speed: 0.371747
Average uncached read: .43
Average speedup with OSS cached read:  .49 = +13%
Average speedup with ladvise willread:  .51 = +18%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0