== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:26:47 (1787102807)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.83809 s, 18.0 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-ffff8e85c7029000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.7845
Iter 1/10: OSS cache speed: 1.76164
Iter 1/10: ladvise speed: 1.87583
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.8543
Iter 2/10: OSS cache speed: 1.88736
Iter 2/10: ladvise speed: 1.9867
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.98481
Iter 3/10: OSS cache speed: 2.08943
Iter 3/10: ladvise speed: 2.12346
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.01525
Iter 4/10: OSS cache speed: 2.13723
Iter 4/10: ladvise speed: 2.09965
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.09402
Iter 5/10: OSS cache speed: 2.01849
Iter 5/10: ladvise speed: 1.99407
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.05752
Iter 6/10: OSS cache speed: 0.758469
Iter 6/10: ladvise speed: 0.669684
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.694966
Iter 7/10: OSS cache speed: 0.739489
Iter 7/10: ladvise speed: 0.724218
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.728407
Iter 8/10: OSS cache speed: 0.67579
Iter 8/10: ladvise speed: 0.617252
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.628714
Iter 9/10: OSS cache speed: 0.66481
Iter 9/10: ladvise speed: 0.629262
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.687276
Iter 10/10: OSS cache speed: 0.730154
Iter 10/10: ladvise speed: 0.703795
Average uncached read: 1.45
Average speedup with OSS cached read:  1.34 = +-7%
Average speedup with ladvise willread:  1.34 = +-7%
Speedup with OSS cached read less than 20%,  got -7%. Skipping ladvise willread check.
fail_loc=0