== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:59:51 (1777024791)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 4.7184 s, 22.2 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-ffff8c675066c000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.17443
Iter 1/10: OSS cache speed: 2.03353
Iter 1/10: ladvise speed: 2.19418
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.00803
Iter 2/10: OSS cache speed: 2.09864
Iter 2/10: ladvise speed: 2.12391
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.14989
Iter 3/10: OSS cache speed: 2.15445
Iter 3/10: ladvise speed: 2.23158
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.077
Iter 4/10: OSS cache speed: 2.05413
Iter 4/10: ladvise speed: 2.00462
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.08084
Iter 5/10: OSS cache speed: 1.75712
Iter 5/10: ladvise speed: 0.634889
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.663414
Iter 6/10: OSS cache speed: 0.681958
Iter 6/10: ladvise speed: 0.61619
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.605826
Iter 7/10: OSS cache speed: 0.609298
Iter 7/10: ladvise speed: 0.569071
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.727037
Iter 8/10: OSS cache speed: 0.673175
Iter 8/10: ladvise speed: 0.704772
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.657952
Iter 9/10: OSS cache speed: 0.671377
Iter 9/10: ladvise speed: 0.861489
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.921586
Iter 10/10: OSS cache speed: 1.08893
Iter 10/10: ladvise speed: 0.959198
Average uncached read: 1.40
Average speedup with OSS cached read:  1.38 = +-1%
Average speedup with ladvise willread:  1.28 = +-8%
Speedup with OSS cached read less than 20%,  got -1%. Skipping ladvise willread check.
fail_loc=0