== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:19:23 (1788866363)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.7317 s, 8.9 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-ffff9f3386f77800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.445304
Iter 1/10: OSS cache speed: 0.420428
Iter 1/10: ladvise speed: 0.417857
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.411916
Iter 2/10: OSS cache speed: 0.450475
Iter 2/10: ladvise speed: 0.473249
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.423167
Iter 3/10: OSS cache speed: 0.466435
Iter 3/10: ladvise speed: 0.294104
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.335158
Iter 4/10: OSS cache speed: 0.443585
Iter 4/10: ladvise speed: 0.430399
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.39566
Iter 5/10: OSS cache speed: 0.414817
Iter 5/10: ladvise speed: 0.445645
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.458537
Iter 6/10: OSS cache speed: 0.420606
Iter 6/10: ladvise speed: 0.397608
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.335188
Iter 7/10: OSS cache speed: 0.414975
Iter 7/10: ladvise speed: 0.373302
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.385457
Iter 8/10: OSS cache speed: 0.398062
Iter 8/10: ladvise speed: 0.432222
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.421273
Iter 9/10: OSS cache speed: 0.339143
Iter 9/10: ladvise speed: 0.419155
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.410804
Iter 10/10: OSS cache speed: 0.342001
Iter 10/10: ladvise speed: 0.412649
Average uncached read: .40
Average speedup with OSS cached read:  .41 = +2%
Average speedup with ladvise willread:  .40 = +0%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0