== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:58:32 (1780333112)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.3852 s, 7.8 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-ffff898bc9643000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.419389
Iter 1/10: OSS cache speed: 0.424388
Iter 1/10: ladvise speed: 0.434529
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.349573
Iter 2/10: OSS cache speed: 0.471647
Iter 2/10: ladvise speed: 0.431458
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.368496
Iter 3/10: OSS cache speed: 0.393418
Iter 3/10: ladvise speed: 0.412333
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.41691
Iter 4/10: OSS cache speed: 0.425469
Iter 4/10: ladvise speed: 0.423214
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.339262
Iter 5/10: OSS cache speed: 0.412396
Iter 5/10: ladvise speed: 0.448548
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.370548
Iter 6/10: OSS cache speed: 0.410288
Iter 6/10: ladvise speed: 0.42629
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.388759
Iter 7/10: OSS cache speed: 0.431745
Iter 7/10: ladvise speed: 0.486615
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.427663
Iter 8/10: OSS cache speed: 0.513534
Iter 8/10: ladvise speed: 0.451999
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.464119
Iter 9/10: OSS cache speed: 0.52583
Iter 9/10: ladvise speed: 0.49613
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.45433
Iter 10/10: OSS cache speed: 0.503868
Iter 10/10: ladvise speed: 0.440264
Average uncached read: .39
Average speedup with OSS cached read:  .45 = +15%
Average speedup with ladvise willread:  .44 = +12%
Speedup with OSS cached read less than 20%,  got 15%. Skipping ladvise willread check.
fail_loc=0