== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 12:26:37 (1779985597)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.7549 s, 8.9 MB/s
llite.lustre-ffff9d3fb9ae5800.read_ahead_stats=clear
llite.lustre-ffff9d3fb9ae5800.read_ahead_stats=
snapshot_time             1779985649.908990935 secs.nsecs
start_time                1779985615.196429428 secs.nsecs
elapsed_time              34.712561507 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          18 samples [pages]
failed_to_reach_end       1 samples [pages]
failed_to_fast_read       230 samples [pages]
mmap_range_read           225 samples [pages]
readahead_pages           225 samples [pages] 8 128 25370
/usr/bin/fio
thp                     : Memory Advise Huge Page
read_test: (g=0): rw=read, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T) 1024KiB-1024KiB, ioengine=mmap, iodepth=1
fio-3.19
Starting 1 process

read_test: (groupid=0, jobs=1): err= 0: pid=226220: Thu May 28 12:47:36 2026
  read: IOPS=4, BW=4382KiB/s (4488kB/s)(5120MiB/1196334msec)
    clat (msec): min=73, max=625, avg=233.24, stdev=71.89
     lat (msec): min=73, max=625, avg=233.25, stdev=71.89
    clat percentiles (msec):
     |  1.00th=[  100],  5.00th=[  127], 10.00th=[  148], 20.00th=[  176],
     | 30.00th=[  194], 40.00th=[  211], 50.00th=[  228], 60.00th=[  243],
     | 70.00th=[  262], 80.00th=[  288], 90.00th=[  326], 95.00th=[  363],
     | 99.00th=[  451], 99.50th=[  489], 99.90th=[  550], 99.95th=[  567],
     | 99.99th=[  625]
   bw (  KiB/s): min= 1935, max=10240, per=100.00%, avg=4397.03, stdev=1428.48, samples=2368
   iops        : min=    1, max=   10, avg= 3.56, stdev= 1.48, samples=2368
  lat (msec)   : 100=1.09%, 250=63.42%, 500=35.06%, 750=0.43%
  cpu          : usr=0.28%, sys=27.26%, ctx=37109, majf=5714, minf=1305273
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued rwts: total=5120,0,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
   READ: bw=4382KiB/s (4488kB/s), 4382KiB/s-4382KiB/s (4488kB/s-4488kB/s), io=5120MiB (5369MB), run=1196334-1196334msec