== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:57:14 (1789304234)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.4029 s, 7.8 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-ffff9d299a8ff800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.345798
Iter 1/10: OSS cache speed: 0.429215
Iter 1/10: ladvise speed: 0.432032
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.413933
Iter 2/10: OSS cache speed: 0.40931
Iter 2/10: ladvise speed: 0.487562
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.455804
Iter 3/10: OSS cache speed: 0.490135
Iter 3/10: ladvise speed: 0.42306
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.511826
Iter 4/10: OSS cache speed: 0.505758
Iter 4/10: ladvise speed: 0.525148
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.487385
Iter 5/10: OSS cache speed: 0.621475
Iter 5/10: ladvise speed: 0.636675
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.549452
Iter 6/10: OSS cache speed: 0.640943
Iter 6/10: ladvise speed: 0.637955
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.555733
Iter 7/10: OSS cache speed: 0.63
Iter 7/10: ladvise speed: 0.586308
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.50721
Iter 8/10: OSS cache speed: 0.621908
Iter 8/10: ladvise speed: 0.580019
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.600435
Iter 9/10: OSS cache speed: 0.68737
Iter 9/10: ladvise speed: 0.701395
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.647805
Iter 10/10: OSS cache speed: 0.687846
Iter 10/10: ladvise speed: 0.714008
Average uncached read: .50
Average speedup with OSS cached read:  .57 = +14%
Average speedup with ladvise willread:  .57 = +14%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0