== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:53:20 (1768128800)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.91417 s, 15.2 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-ffff8e1b07250800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.2606
Iter 1/10: OSS cache speed: 2.23386
Iter 1/10: ladvise speed: 2.16966
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.98687
Iter 2/10: OSS cache speed: 2.21607
Iter 2/10: ladvise speed: 2.1355
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.11995
Iter 3/10: OSS cache speed: 1.70239
Iter 3/10: ladvise speed: 2.07433
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.89477
Iter 4/10: OSS cache speed: 1.59032
Iter 4/10: ladvise speed: 1.85826
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.70174
Iter 5/10: OSS cache speed: 2.35074
Iter 5/10: ladvise speed: 2.10512
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.99571
Iter 6/10: OSS cache speed: 1.34737
Iter 6/10: ladvise speed: 2.39561
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.40338
Iter 7/10: OSS cache speed: 2.44324
Iter 7/10: ladvise speed: 2.2744
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.14621
Iter 8/10: OSS cache speed: 2.28503
Iter 8/10: ladvise speed: 2.38775
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.2536
Iter 9/10: OSS cache speed: 2.4001
Iter 9/10: ladvise speed: 2.3948
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.36956
Iter 10/10: OSS cache speed: 2.44004
Iter 10/10: ladvise speed: 2.3281
Average uncached read: 2.11
Average speedup with OSS cached read:  2.10 = +0%
Average speedup with ladvise willread:  2.21 = +4%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0