== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:01:08 (1782928868)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.86035 s, 17.9 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-ffff94bc10863000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.92463
Iter 1/10: OSS cache speed: 1.97858
Iter 1/10: ladvise speed: 1.91257
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.61954
Iter 2/10: OSS cache speed: 1.65921
Iter 2/10: ladvise speed: 1.90002
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.05005
Iter 3/10: OSS cache speed: 1.39345
Iter 3/10: ladvise speed: 1.19725
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.75086
Iter 4/10: OSS cache speed: 1.87251
Iter 4/10: ladvise speed: 1.7735
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.83437
Iter 5/10: OSS cache speed: 1.92102
Iter 5/10: ladvise speed: 1.86464
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.93196
Iter 6/10: OSS cache speed: 1.96827
Iter 6/10: ladvise speed: 2.10401
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.0345
Iter 7/10: OSS cache speed: 1.95713
Iter 7/10: ladvise speed: 2.12997
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.05831
Iter 8/10: OSS cache speed: 1.90846
Iter 8/10: ladvise speed: 2.05639
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.1627
Iter 9/10: OSS cache speed: 2.14297
Iter 9/10: ladvise speed: 2.21289
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.04269
Iter 10/10: OSS cache speed: 2.14481
Iter 10/10: ladvise speed: 1.95568
Average uncached read: 1.94
Average speedup with OSS cached read:  1.89 = +-2%
Average speedup with ladvise willread:  1.91 = +-1%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0