== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:13:36 (1787102016)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.63856 s, 15.8 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-ffff9d4fc6eb5800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.3062
Iter 1/10: OSS cache speed: 1.51423
Iter 1/10: ladvise speed: 1.35845
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.28733
Iter 2/10: OSS cache speed: 1.04369
Iter 2/10: ladvise speed: 1.28201
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.32257
Iter 3/10: OSS cache speed: 1.15248
Iter 3/10: ladvise speed: 0.510171
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.60311
Iter 4/10: OSS cache speed: 0.64096
Iter 4/10: ladvise speed: 1.18531
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.89492
Iter 5/10: OSS cache speed: 1.8369
Iter 5/10: ladvise speed: 1.54497
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.69235
Iter 6/10: OSS cache speed: 1.51896
Iter 6/10: ladvise speed: 1.99854
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.98641
Iter 7/10: OSS cache speed: 1.96336
Iter 7/10: ladvise speed: 2.09319
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.98072
Iter 8/10: OSS cache speed: 1.95398
Iter 8/10: ladvise speed: 2.12842
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.8227
Iter 9/10: OSS cache speed: 1.7587
Iter 9/10: ladvise speed: 1.1159
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.0363
Iter 10/10: OSS cache speed: 1.2458
Iter 10/10: ladvise speed: 1.16288
Average uncached read: 1.49
Average speedup with OSS cached read:  1.46 = +-2%
Average speedup with ladvise willread:  1.43 = +-4%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0