== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:51:00 (1748868660)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.45211 s, 42.8 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-ffff8800a984a800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.88211
Iter 1/10: OSS cache speed: 2.19908
Iter 1/10: ladvise speed: 2.03988
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.87949
Iter 2/10: OSS cache speed: 1.75679
Iter 2/10: ladvise speed: 2.34659
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.33404
Iter 3/10: OSS cache speed: 2.33422
Iter 3/10: ladvise speed: 2.42132
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.26887
Iter 4/10: OSS cache speed: 2.37069
Iter 4/10: ladvise speed: 2.22495
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.29361
Iter 5/10: OSS cache speed: 2.23825
Iter 5/10: ladvise speed: 2.34007
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.24091
Iter 6/10: OSS cache speed: 2.32662
Iter 6/10: ladvise speed: 2.36741
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.21298
Iter 7/10: OSS cache speed: 2.31357
Iter 7/10: ladvise speed: 2.43575
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.43785
Iter 8/10: OSS cache speed: 2.41054
Iter 8/10: ladvise speed: 2.72742
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.71043
Iter 9/10: OSS cache speed: 2.72377
Iter 9/10: ladvise speed: 2.66374
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.64748
Iter 10/10: OSS cache speed: 2.71564
Iter 10/10: ladvise speed: 2.72411
Average uncached read: 2.29
Average speedup with OSS cached read:  2.33 = +1%
Average speedup with ladvise willread:  2.42 = +5%
Speedup with OSS cached read less than 20%,  got 1%. Skipping ladvise willread check.
fail_loc=0