diff options
Diffstat (limited to 'tools/sched_ext/scx_qmap.bpf.c')
| -rw-r--r-- | tools/sched_ext/scx_qmap.bpf.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/tools/sched_ext/scx_qmap.bpf.c b/tools/sched_ext/scx_qmap.bpf.c index 976a2693da71..8beae08dfdc7 100644 --- a/tools/sched_ext/scx_qmap.bpf.c +++ b/tools/sched_ext/scx_qmap.bpf.c @@ -29,6 +29,8 @@ enum consts { char _license[] SEC("license") = "GPL"; const volatile u64 slice_ns = SCX_SLICE_DFL; +const volatile u32 stall_user_nth; +const volatile u32 stall_kernel_nth; const volatile u32 dsp_batch; u32 test_error_cnt; @@ -129,11 +131,20 @@ static int weight_to_idx(u32 weight) void BPF_STRUCT_OPS(qmap_enqueue, struct task_struct *p, u64 enq_flags) { + static u32 user_cnt, kernel_cnt; struct task_ctx *tctx; u32 pid = p->pid; int idx = weight_to_idx(p->scx.weight); void *ring; + if (p->flags & PF_KTHREAD) { + if (stall_kernel_nth && !(++kernel_cnt % stall_kernel_nth)) + return; + } else { + if (stall_user_nth && !(++user_cnt % stall_user_nth)) + return; + } + if (test_error_cnt && !--test_error_cnt) scx_bpf_error("test triggering error"); @@ -261,4 +272,5 @@ SCX_OPS_DEFINE(qmap_ops, .init_task = (void *)qmap_init_task, .init = (void *)qmap_init, .exit = (void *)qmap_exit, + .timeout_ms = 5000U, .name = "qmap"); |