== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:39:24 (1789130364)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.1421 s, 8.6 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-ffff95c1585c6000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.360754
Iter 1/10: OSS cache speed: 0.387175
Iter 1/10: ladvise speed: 0.379184
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.348619
Iter 2/10: OSS cache speed: 0.37114
Iter 2/10: ladvise speed: 0.380824
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.348124
Iter 3/10: OSS cache speed: 0.413547
Iter 3/10: ladvise speed: 0.42983
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.358804
Iter 4/10: OSS cache speed: 0.442428
Iter 4/10: ladvise speed: 0.384865
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.384992
Iter 5/10: OSS cache speed: 0.455527
Iter 5/10: ladvise speed: 0.407303
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.413071
Iter 6/10: OSS cache speed: 0.429407
Iter 6/10: ladvise speed: 0.407713
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.408549
Iter 7/10: OSS cache speed: 0.444562
Iter 7/10: ladvise speed: 0.428367
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.340759
Iter 8/10: OSS cache speed: 0.451594
Iter 8/10: ladvise speed: 0.391796
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.34138
Iter 9/10: OSS cache speed: 0.369689
Iter 9/10: ladvise speed: 0.413388
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.38688
Iter 10/10: OSS cache speed: 0.397168
Iter 10/10: ladvise speed: 0.430845
Average uncached read: .36
Average speedup with OSS cached read:  .41 = +13%
Average speedup with ladvise willread:  .40 = +11%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0