== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:34:31 (1750592071)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 5.0436 s, 20.8 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-ffff88012ab0e800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.860273
Iter 1/10: OSS cache speed: 0.853101
Iter 1/10: ladvise speed: 0.89625
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.66579
Iter 2/10: OSS cache speed: 0.784467
Iter 2/10: ladvise speed: 0.778837
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.705253
Iter 3/10: OSS cache speed: 0.804529
Iter 3/10: ladvise speed: 0.827554
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.708391
Iter 4/10: OSS cache speed: 0.780271
Iter 4/10: ladvise speed: 0.798609
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.725014
Iter 5/10: OSS cache speed: 0.768376
Iter 5/10: ladvise speed: 0.766482
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.669802
Iter 6/10: OSS cache speed: 0.725136
Iter 6/10: ladvise speed: 0.729635
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.719123
Iter 7/10: OSS cache speed: 0.704313
Iter 7/10: ladvise speed: 0.75533
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.707886
Iter 8/10: OSS cache speed: 0.754859
Iter 8/10: ladvise speed: 0.757599
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.685768
Iter 9/10: OSS cache speed: 0.736514
Iter 9/10: ladvise speed: 0.783292
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.688636
Iter 10/10: OSS cache speed: 0.736729
Iter 10/10: ladvise speed: 0.743647
Average uncached read: .71
Average speedup with OSS cached read:  .76 = +7%
Average speedup with ladvise willread:  .78 = +9%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0