From 8ea40470d15de47aa3bd6004fc5783f94535e00d Mon Sep 17 00:00:00 2001 From: Roger Pau Monne Date: Mon, 17 Feb 2014 16:08:58 +0100 Subject: [PATCH] xen: debug Xen PV timer --- sys/dev/xen/timer/timer.c | 8 ++++++-- 1 files changed, 6 insertions(+), 2 deletions(-) diff --git a/sys/dev/xen/timer/timer.c b/sys/dev/xen/timer/timer.c index 354085b..a31343b 100644 --- a/sys/dev/xen/timer/timer.c +++ b/sys/dev/xen/timer/timer.c @@ -76,6 +76,8 @@ static devclass_t xentimer_devclass; #define XENTIMER_QUALITY 950 +#define NUM_RETRIES 60 + struct xentimer_pcpu_data { uint64_t timer; uint64_t last_processed; @@ -413,8 +415,10 @@ xentimer_et_start(struct eventtimer *et, * equipped to deal with start failures. */ do { - if (++i == 60) - panic("can't schedule timer"); + if (++i == NUM_RETRIES) { + panic("can't schedule timer on vCPU#%d, interval: %" PRIu64 "ns", + cpu, first_in_ns); + } next_time = xen_fetch_vcpu_time() + first_in_ns; error = xentimer_vcpu_start_timer(cpu, next_time); } while (error == -ETIME); -- 1.7.7.5 (Apple Git-26)