== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:42:42 (1758739362)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.4585 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-ffff916b06630800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.35885
Iter 1/10: OSS cache speed: 0.408558
Iter 1/10: ladvise speed: 0.374943
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.344843
Iter 2/10: OSS cache speed: 0.353662
Iter 2/10: ladvise speed: 0.414527
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.441336
Iter 3/10: OSS cache speed: 0.431929
Iter 3/10: ladvise speed: 0.469324
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.420678
Iter 4/10: OSS cache speed: 0.534504
Iter 4/10: ladvise speed: 0.591714
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.50673
Iter 5/10: OSS cache speed: 0.54453
Iter 5/10: ladvise speed: 0.558266
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.563115
Iter 6/10: OSS cache speed: 0.648605
Iter 6/10: ladvise speed: 0.702274
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.643149
Iter 7/10: OSS cache speed: 0.782212
Iter 7/10: ladvise speed: 0.928208
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.822308
Iter 8/10: OSS cache speed: 1.10575
Iter 8/10: ladvise speed: 1.34087
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.13712
Iter 9/10: OSS cache speed: 1.22168
Iter 9/10: ladvise speed: 1.25717
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.06859
Iter 10/10: OSS cache speed: 0.960116
Iter 10/10: ladvise speed: 1.23514
Average uncached read: .63
Average speedup with OSS cached read:  .69 = +9%
Average speedup with ladvise willread:  .78 = +23%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0