== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:20:57 (1790947257)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.5745 s, 7.7 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-ffff99fb91756000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.382042
Iter 1/10: OSS cache speed: 0.454889
Iter 1/10: ladvise speed: 0.455552
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.41795
Iter 2/10: OSS cache speed: 0.497436
Iter 2/10: ladvise speed: 0.409586
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.441062
Iter 3/10: OSS cache speed: 0.458164
Iter 3/10: ladvise speed: 0.453364
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.410771
Iter 4/10: OSS cache speed: 0.439784
Iter 4/10: ladvise speed: 0.465913
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.373647
Iter 5/10: OSS cache speed: 0.441181
Iter 5/10: ladvise speed: 0.420493
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.381429
Iter 6/10: OSS cache speed: 0.417883
Iter 6/10: ladvise speed: 0.423479
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.352482
Iter 7/10: OSS cache speed: 0.451891
Iter 7/10: ladvise speed: 0.394076
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.387732
Iter 8/10: OSS cache speed: 0.439989
Iter 8/10: ladvise speed: 0.405351
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.389389
Iter 9/10: OSS cache speed: 0.420767
Iter 9/10: ladvise speed: 0.471131
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.383836
Iter 10/10: OSS cache speed: 0.390454
Iter 10/10: ladvise speed: 0.466025
Average uncached read: .39
Average speedup with OSS cached read:  .44 = +12%
Average speedup with ladvise willread:  .43 = +10%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0