== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:22:30 (1783074150)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.5635 s, 16.0 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-ffff8f1c87f89800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.662022
Iter 1/10: OSS cache speed: 0.926404
Iter 1/10: ladvise speed: 1.07404
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.816071
Iter 2/10: OSS cache speed: 1.06815
Iter 2/10: ladvise speed: 1.42085
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.15594
Iter 3/10: OSS cache speed: 1.28395
Iter 3/10: ladvise speed: 1.44293
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.50491
Iter 4/10: OSS cache speed: 1.86755
Iter 4/10: ladvise speed: 1.73493
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.32824
Iter 5/10: OSS cache speed: 1.89414
Iter 5/10: ladvise speed: 1.71532
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.61876
Iter 6/10: OSS cache speed: 1.92863
Iter 6/10: ladvise speed: 1.95069
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.98842
Iter 7/10: OSS cache speed: 2.10738
Iter 7/10: ladvise speed: 2.15639
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.0353
Iter 8/10: OSS cache speed: 2.45076
Iter 8/10: ladvise speed: 2.32882
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.1981
Iter 9/10: OSS cache speed: 2.31023
Iter 9/10: ladvise speed: 2.43863
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.26954
Iter 10/10: OSS cache speed: 2.46942
Iter 10/10: ladvise speed: 2.47335
Average uncached read: 1.55
Average speedup with OSS cached read:  1.83 = +18%
Average speedup with ladvise willread:  1.87 = +20%
Speedup with OSS cached read less than 20%,  got 18%. Skipping ladvise willread check.
fail_loc=0