== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:26:24 (1789586784)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.4293 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-ffff9d7c0ff92000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.355238
Iter 1/10: OSS cache speed: 0.364315
Iter 1/10: ladvise speed: 0.330248
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.327224
Iter 2/10: OSS cache speed: 0.342412
Iter 2/10: ladvise speed: 0.332689
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.361289
Iter 3/10: OSS cache speed: 0.297417
Iter 3/10: ladvise speed: 0.337992
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.332743
Iter 4/10: OSS cache speed: 0.396981
Iter 4/10: ladvise speed: 0.298166
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.332089
Iter 5/10: OSS cache speed: 0.364704
Iter 5/10: ladvise speed: 0.324693
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.3393
Iter 6/10: OSS cache speed: 0.369407
Iter 6/10: ladvise speed: 0.33075
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.320864
Iter 7/10: OSS cache speed: 0.27632
Iter 7/10: ladvise speed: 0.278126
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.273598
Iter 8/10: OSS cache speed: 0.368363
Iter 8/10: ladvise speed: 0.319996
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.385751
Iter 9/10: OSS cache speed: 0.319889
Iter 9/10: ladvise speed: 0.329014
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.394228
Iter 10/10: OSS cache speed: 0.366951
Iter 10/10: ladvise speed: 0.327543
Average uncached read: .34
Average speedup with OSS cached read:  .34 = +0%
Average speedup with ladvise willread:  .32 = +-5%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0