== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:48:14 (1746136094)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.98569 s, 26.3 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-ffff88012a49e000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.993365
Iter 1/10: OSS cache speed: 0.872024
Iter 1/10: ladvise speed: 0.789936
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.881851
Iter 2/10: OSS cache speed: 0.806137
Iter 2/10: ladvise speed: 0.82591
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.795089
Iter 3/10: OSS cache speed: 0.793289
Iter 3/10: ladvise speed: 0.900614
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.994319
Iter 4/10: OSS cache speed: 0.852394
Iter 4/10: ladvise speed: 0.858697
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.794464
Iter 5/10: OSS cache speed: 0.909557
Iter 5/10: ladvise speed: 0.848926
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.940199
Iter 6/10: OSS cache speed: 0.975289
Iter 6/10: ladvise speed: 0.982745
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.978202
Iter 7/10: OSS cache speed: 0.926125
Iter 7/10: ladvise speed: 1.01697
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.933859
Iter 8/10: OSS cache speed: 0.892635
Iter 8/10: ladvise speed: 0.984794
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.930361
Iter 9/10: OSS cache speed: 0.938329
Iter 9/10: ladvise speed: 1.15245
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.05403
Iter 10/10: OSS cache speed: 0.991628
Iter 10/10: ladvise speed: 0.98455
Average uncached read: .92
Average speedup with OSS cached read:  .89 = +-3%
Average speedup with ladvise willread:  .93 = +1%
Speedup with OSS cached read less than 20%,  got -3%. Skipping ladvise willread check.
fail_loc=0