== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:40:29 (1782758429)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.1133 s, 7.4 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-ffff8ff106449000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.36073
Iter 1/10: OSS cache speed: 0.386175
Iter 1/10: ladvise speed: 0.400185
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.427526
Iter 2/10: OSS cache speed: 0.394024
Iter 2/10: ladvise speed: 0.372738
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.371883
Iter 3/10: OSS cache speed: 0.275147
Iter 3/10: ladvise speed: 0.589559
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.533352
Iter 4/10: OSS cache speed: 0.61403
Iter 4/10: ladvise speed: 0.661001
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.618836
Iter 5/10: OSS cache speed: 0.778047
Iter 5/10: ladvise speed: 0.844021
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.377102
Iter 6/10: OSS cache speed: 0.268403
Iter 6/10: ladvise speed: 0.410685
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.385517
Iter 7/10: OSS cache speed: 0.416855
Iter 7/10: ladvise speed: 0.419274
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.342474
Iter 8/10: OSS cache speed: 0.453042
Iter 8/10: ladvise speed: 0.495868
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.495146
Iter 9/10: OSS cache speed: 0.509013
Iter 9/10: ladvise speed: 0.400372
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.448745
Iter 10/10: OSS cache speed: 0.390409
Iter 10/10: ladvise speed: 0.364282
Average uncached read: .43
Average speedup with OSS cached read:  .44 = +2%
Average speedup with ladvise willread:  .49 = +13%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0