== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:46:37 (1784234797)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.04411 s, 14.9 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-ffff986f9145a800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.47084
Iter 1/10: OSS cache speed: 1.63051
Iter 1/10: ladvise speed: 1.85196
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.59753
Iter 2/10: OSS cache speed: 1.59853
Iter 2/10: ladvise speed: 1.74787
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.36313
Iter 3/10: OSS cache speed: 1.90881
Iter 3/10: ladvise speed: 0.654641
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.544215
Iter 4/10: OSS cache speed: 0.380688
Iter 4/10: ladvise speed: 0.590458
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.51253
Iter 5/10: OSS cache speed: 0.550138
Iter 5/10: ladvise speed: 0.594184
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.509409
Iter 6/10: OSS cache speed: 0.719932
Iter 6/10: ladvise speed: 0.347599
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.292883
Iter 7/10: OSS cache speed: 0.391801
Iter 7/10: ladvise speed: 0.402711
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.339804
Iter 8/10: OSS cache speed: 0.371635
Iter 8/10: ladvise speed: 0.330517
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.357952
Iter 9/10: OSS cache speed: 0.365901
Iter 9/10: ladvise speed: 0.374388
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.358888
Iter 10/10: OSS cache speed: 0.438917
Iter 10/10: ladvise speed: 0.382879
Average uncached read: .73
Average speedup with OSS cached read:  .83 = +13%
Average speedup with ladvise willread:  .72 = +-1%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0