== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:20:32 (1777911632)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.41733 s, 19.4 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-ffff93789838f000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.13748
Iter 1/10: OSS cache speed: 2.12996
Iter 1/10: ladvise speed: 2.33609
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.24481
Iter 2/10: OSS cache speed: 2.256
Iter 2/10: ladvise speed: 2.14013
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.09017
Iter 3/10: OSS cache speed: 2.21587
Iter 3/10: ladvise speed: 2.15474
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.03894
Iter 4/10: OSS cache speed: 2.19332
Iter 4/10: ladvise speed: 2.0823
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.35026
Iter 5/10: OSS cache speed: 2.09279
Iter 5/10: ladvise speed: 2.19047
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.21048
Iter 6/10: OSS cache speed: 2.17166
Iter 6/10: ladvise speed: 2.19383
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.1878
Iter 7/10: OSS cache speed: 2.18649
Iter 7/10: ladvise speed: 2.07191
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.14404
Iter 8/10: OSS cache speed: 2.18367
Iter 8/10: ladvise speed: 2.18648
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.19004
Iter 9/10: OSS cache speed: 2.24036
Iter 9/10: ladvise speed: 1.19415
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.85404
Iter 10/10: OSS cache speed: 2.13485
Iter 10/10: ladvise speed: 2.29016
Average uncached read: 2.14
Average speedup with OSS cached read:  2.18 = +1%
Average speedup with ladvise willread:  2.08 = +-2%
Speedup with OSS cached read less than 20%,  got 1%. Skipping ladvise willread check.
fail_loc=0