== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:02:35 (1788876155)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.21566 s, 16.9 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-ffff91df207c4000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.58809
Iter 1/10: OSS cache speed: 2.75425
Iter 1/10: ladvise speed: 2.88034
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.37318
Iter 2/10: OSS cache speed: 2.63183
Iter 2/10: ladvise speed: 2.57241
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.56116
Iter 3/10: OSS cache speed: 2.81594
Iter 3/10: ladvise speed: 2.80856
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.65689
Iter 4/10: OSS cache speed: 2.941
Iter 4/10: ladvise speed: 2.56263
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.40703
Iter 5/10: OSS cache speed: 2.51704
Iter 5/10: ladvise speed: 2.79572
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.3852
Iter 6/10: OSS cache speed: 2.77888
Iter 6/10: ladvise speed: 2.85943
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.36996
Iter 7/10: OSS cache speed: 2.60498
Iter 7/10: ladvise speed: 2.83956
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.38153
Iter 8/10: OSS cache speed: 2.62645
Iter 8/10: ladvise speed: 2.67934
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.40928
Iter 9/10: OSS cache speed: 2.62068
Iter 9/10: ladvise speed: 2.95818
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.62363
Iter 10/10: OSS cache speed: 2.66781
Iter 10/10: ladvise speed: 2.52795
Average uncached read: 2.47
Average speedup with OSS cached read:  2.69 = +8%
Average speedup with ladvise willread:  2.74 = +10%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0