== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:16:33 (1752689793)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.04251 s, 17.4 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-ffff8f8ccb679000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.91764
Iter 1/10: OSS cache speed: 2.27427
Iter 1/10: ladvise speed: 2.34497
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.21863
Iter 2/10: OSS cache speed: 2.45703
Iter 2/10: ladvise speed: 2.31248
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.32614
Iter 3/10: OSS cache speed: 2.36994
Iter 3/10: ladvise speed: 2.55777
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.13835
Iter 4/10: OSS cache speed: 2.26492
Iter 4/10: ladvise speed: 2.37196
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.11584
Iter 5/10: OSS cache speed: 2.47016
Iter 5/10: ladvise speed: 2.42694
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.26589
Iter 6/10: OSS cache speed: 2.35014
Iter 6/10: ladvise speed: 2.35898
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.27014
Iter 7/10: OSS cache speed: 2.48302
Iter 7/10: ladvise speed: 2.42644
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.28274
Iter 8/10: OSS cache speed: 2.46174
Iter 8/10: ladvise speed: 2.47792
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.2898
Iter 9/10: OSS cache speed: 2.41886
Iter 9/10: ladvise speed: 2.45616
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.2855
Iter 10/10: OSS cache speed: 2.44062
Iter 10/10: ladvise speed: 2.44878
Average uncached read: 2.21
Average speedup with OSS cached read:  2.39 = +8%
Average speedup with ladvise willread:  2.41 = +9%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0