== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:15:51 (1755040551)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.7713 s, 18.2 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-ffff949ec2b4f800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.20083
Iter 1/10: OSS cache speed: 2.14453
Iter 1/10: ladvise speed: 2.13442
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.22384
Iter 2/10: OSS cache speed: 2.01184
Iter 2/10: ladvise speed: 2.03013
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.81795
Iter 3/10: OSS cache speed: 2.06713
Iter 3/10: ladvise speed: 1.95772
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.03664
Iter 4/10: OSS cache speed: 2.18915
Iter 4/10: ladvise speed: 2.21908
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.12799
Iter 5/10: OSS cache speed: 2.01102
Iter 5/10: ladvise speed: 1.87373
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.18763
Iter 6/10: OSS cache speed: 1.99779
Iter 6/10: ladvise speed: 0.914014
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.237132
Iter 7/10: OSS cache speed: 0.509827
Iter 7/10: ladvise speed: 0.432742
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.428537
Iter 8/10: OSS cache speed: 0.333423
Iter 8/10: ladvise speed: 0.306109
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.338442
Iter 9/10: OSS cache speed: 0.392157
Iter 9/10: ladvise speed: 0.55802
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.560992
Iter 10/10: OSS cache speed: 0.503338
Iter 10/10: ladvise speed: 0.816302
Average uncached read: 1.41
Average speedup with OSS cached read:  1.41 = +0%
Average speedup with ladvise willread:  1.32 = +-6%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0