== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:19:18 (1786565958)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.85934 s, 10.6 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-ffff889ad0c1b800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.439907
Iter 1/10: OSS cache speed: 0.387087
Iter 1/10: ladvise speed: 0.439714
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.434069
Iter 2/10: OSS cache speed: 0.466193
Iter 2/10: ladvise speed: 0.548604
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.474044
Iter 3/10: OSS cache speed: 0.471415
Iter 3/10: ladvise speed: 0.500771
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.444831
Iter 4/10: OSS cache speed: 0.493216
Iter 4/10: ladvise speed: 0.537132
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.427195
Iter 5/10: OSS cache speed: 0.463988
Iter 5/10: ladvise speed: 0.271649
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.379775
Iter 6/10: OSS cache speed: 0.39641
Iter 6/10: ladvise speed: 0.436378
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.294055
Iter 7/10: OSS cache speed: 0.419427
Iter 7/10: ladvise speed: 0.391927
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.433577
Iter 8/10: OSS cache speed: 0.453522
Iter 8/10: ladvise speed: 0.478588
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.410628
Iter 9/10: OSS cache speed: 0.484345
Iter 9/10: ladvise speed: 0.482307
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.38823
Iter 10/10: OSS cache speed: 0.425614
Iter 10/10: ladvise speed: 0.388614
Average uncached read: .41
Average speedup with OSS cached read:  .44 = +7%
Average speedup with ladvise willread:  .44 = +7%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0