== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:10:17 (1787469017)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.4953 s, 10.0 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-ffff9ba006460000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.249063
Iter 1/10: OSS cache speed: 0.295658
Iter 1/10: ladvise speed: 0.297118
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.244197
Iter 2/10: OSS cache speed: 0.280313
Iter 2/10: ladvise speed: 0.314604
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.250585
Iter 3/10: OSS cache speed: 0.335351
Iter 3/10: ladvise speed: 0.341259
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.302611
Iter 4/10: OSS cache speed: 0.339102
Iter 4/10: ladvise speed: 0.316383
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.279704
Iter 5/10: OSS cache speed: 0.328516
Iter 5/10: ladvise speed: 0.308771
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.332845
Iter 6/10: OSS cache speed: 0.409366
Iter 6/10: ladvise speed: 0.36249
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.300592
Iter 7/10: OSS cache speed: 0.305496
Iter 7/10: ladvise speed: 0.312165
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.32835
Iter 8/10: OSS cache speed: 0.393826
Iter 8/10: ladvise speed: 0.29006
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.317764
Iter 9/10: OSS cache speed: 0.379431
Iter 9/10: ladvise speed: 0.297901
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.320713
Iter 10/10: OSS cache speed: 0.320022
Iter 10/10: ladvise speed: 0.343471
Average uncached read: .29
Average speedup with OSS cached read:  .33 = +13%
Average speedup with ladvise willread:  .31 = +6%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0