== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:46:27 (1747795587)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.25394 s, 46.5 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-ffff88012dc65800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.34049
Iter 1/10: OSS cache speed: 1.42578
Iter 1/10: ladvise speed: 1.34738
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.38143
Iter 2/10: OSS cache speed: 1.39587
Iter 2/10: ladvise speed: 1.35362
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.30858
Iter 3/10: OSS cache speed: 1.44898
Iter 3/10: ladvise speed: 1.37722
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.34682
Iter 4/10: OSS cache speed: 1.41773
Iter 4/10: ladvise speed: 1.44382
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.74342
Iter 5/10: OSS cache speed: 2.11828
Iter 5/10: ladvise speed: 1.37346
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.42442
Iter 6/10: OSS cache speed: 1.54851
Iter 6/10: ladvise speed: 1.61006
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.49254
Iter 7/10: OSS cache speed: 1.35779
Iter 7/10: ladvise speed: 1.75361
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.72166
Iter 8/10: OSS cache speed: 1.97689
Iter 8/10: ladvise speed: 1.71338
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.5351
Iter 9/10: OSS cache speed: 1.54369
Iter 9/10: ladvise speed: 1.97316
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.84564
Iter 10/10: OSS cache speed: 1.88
Iter 10/10: ladvise speed: 1.95745
Average uncached read: 1.51
Average speedup with OSS cached read:  1.61 = +6%
Average speedup with ladvise willread:  1.59 = +5%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0