== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 22:06:52 (1777428412)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.51707 s, 19.0 MB/s
llite.lustre-ffff8f7b5812c000.read_ahead_stats=clear
llite.lustre-ffff8f7b5812c000.read_ahead_stats=
snapshot_time             1777428425.145408807 secs.nsecs
start_time                1777428419.444391949 secs.nsecs
elapsed_time              5.701016858 secs.nsecs
hits                      25567 samples [pages]
misses                    33 samples [pages]
zero_size_window          3 samples [pages]
async_readahead           2 samples [pages]
failed_to_fast_read       36 samples [pages]
mmap_range_read           28 samples [pages]
readahead_pages           35 samples [pages] 8 4096 25567
/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=300853: Tue Apr 28 22:13:13 2026
  read: IOPS=13, BW=13.0MiB/s (14.7MB/s)(5120MiB/365748msec)
    clat (msec): min=47, max=250, avg=71.29, stdev=31.21
     lat (msec): min=47, max=250, avg=71.29, stdev=31.21
    clat percentiles (msec):
     |  1.00th=[   49],  5.00th=[   53], 10.00th=[   54], 20.00th=[   55],
     | 30.00th=[   55], 40.00th=[   56], 50.00th=[   57], 60.00th=[   60],
     | 70.00th=[   65], 80.00th=[   75], 90.00th=[  127], 95.00th=[  133],
     | 99.00th=[  213], 99.50th=[  230], 99.90th=[  245], 99.95th=[  251],
     | 99.99th=[  251]
   bw (  KiB/s): min= 4096, max=22528, per=100.00%, avg=14377.87, stdev=4847.48, samples=729
   iops        : min=    4, max=   22, avg=14.03, stdev= 4.74, samples=729
  lat (msec)   : 50=3.28%, 100=79.92%, 250=16.74%, 500=0.06%
  cpu          : usr=0.54%, sys=86.85%, ctx=11554, majf=5120, minf=1305867
  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=13.0MiB/s (14.7MB/s), 13.0MiB/s-13.0MiB/s (14.7MB/s-14.7MB/s), io=5120MiB (5369MB), run=365748-365748msec