From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gerd von Egidy Subject: Re: disappointing speed with virtio_blk Date: Fri, 18 Apr 2008 23:27:58 +0200 Message-ID: <200804182327.58902.lists@egidy.de> References: <200804132304.44950.lists@egidy.de> <200804170105.50963.lists@egidy.de> <20080416234055.GA4869@dmt> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: kvm-devel@lists.sourceforge.net, Marcelo Tosatti Return-path: In-Reply-To: <20080416234055.GA4869@dmt> Content-Disposition: inline List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces@lists.sourceforge.net Errors-To: kvm-devel-bounces@lists.sourceforge.net List-Id: kvm.vger.kernel.org Hi Marcelo, > > > http://www.mail-archive.com/kvm-devel@lists.sourceforge.net/msg14732.html > > > > I tried it this evening with kvm 66 - which should include your patch, > > right? > > No its not included. The issue is being worked on. my bad, sorry. Now I know I really have that patch: qemu-kvm hangs :( I was trying kvm 66 with only the patch listed above applied on an otherwise perfectly working vm with virtio_blk root partition: Last line of the booting kernel in my vnc window: Serial: 8250/16550 driver $Revision 1.90... (you know the rest) an strace of the qemu-kvm gave the following in rapid succession: clock_gettime(CLOCK_MONOTONIC, {2565, 306799672}) = 0 clock_gettime(CLOCK_MONOTONIC, {2565, 307065342}) = 0 clock_gettime(CLOCK_MONOTONIC, {2565, 307354930}) = 0 clock_gettime(CLOCK_MONOTONIC, {2565, 307618803}) = 0 clock_gettime(CLOCK_MONOTONIC, {2565, 307886312}) = 0 timer_gettime(0, {it_interval={0, 0}, it_value={0, 0}}) = 0 timer_settime(0, 0, {it_interval={0, 0}, it_value={0, 33000000}}, NULL) = 0 rt_sigtimedwait([USR1 USR2 ALRM IO], {si_signo=SIGALRM, si_code=SI_TIMER, si_pid=0, si_uid=0, si_value={int=0, ptr=0}}, 0xbfe5af88, 8) = 14 rt_sigaction(SIGALRM, NULL, {0x804d8f8, ~[KILL STOP RTMIN RT_1], 0}, 8) = 0 select(12, [6 11], [], [], {0, 0}) = 0 (Timeout) select(0, [], NULL, NULL, {0, 0}) = 0 (Timeout) clock_gettime(CLOCK_MONOTONIC, {2565, 342895116}) = 0 clock_gettime(CLOCK_MONOTONIC, {2565, 343164113}) = 0 clock_gettime(CLOCK_MONOTONIC, {2565, 343454002}) = 0 clock_gettime(CLOCK_MONOTONIC, {2565, 343716804}) = 0 clock_gettime(CLOCK_MONOTONIC, {2565, 343980012}) = 0 timer_gettime(0, {it_interval={0, 0}, it_value={0, 0}}) = 0 timer_settime(0, 0, {it_interval={0, 0}, it_value={0, 33000000}}, NULL) = 0 rt_sigtimedwait([USR1 USR2 ALRM IO], {si_signo=SIGALRM, si_code=SI_TIMER, si_pid=0, si_uid=0, si_value={int=0, ptr=0}}, 0xbfe5af88, 8) = 14 rt_sigaction(SIGALRM, NULL, {0x804d8f8, ~[KILL STOP RTMIN RT_1], 0}, 8) = 0 select(12, [6 11], [], [], {0, 0}) = 0 (Timeout) select(0, [], NULL, NULL, {0, 0}) = 0 (Timeout) clock_gettime(CLOCK_MONOTONIC, {2565, 379035364}) = 0 clock_gettime(CLOCK_MONOTONIC, {2565, 379307884}) = 0 clock_gettime(CLOCK_MONOTONIC, {2565, 379589434}) = 0 clock_gettime(CLOCK_MONOTONIC, {2565, 379919100}) = 0 clock_gettime(CLOCK_MONOTONIC, {2565, 380183834}) = 0 timer_gettime(0, {it_interval={0, 0}, it_value={0, 0}}) = 0 timer_settime(0, 0, {it_interval={0, 0}, it_value={0, 33000000}}, NULL) = 0 rt_sigtimedwait([USR1 USR2 ALRM IO], {si_signo=SIGALRM, si_code=SI_TIMER, si_pid=0, si_uid=0, si_value={int=0, ptr=0}}, 0xbfe5af88, 8) = 14 rt_sigaction(SIGALRM, NULL, {0x804d8f8, ~[KILL STOP RTMIN RT_1], 0}, 8) = 0 select(12, [6 11], [], [], {0, 0}) = 0 (Timeout) select(0, [], NULL, NULL, {0, 0}) = 0 (Timeout) ... Hope that helps. Kind regards, Gerd -- Address (better: trap) for people I really don't want to get mail from: james@cactusamerica.com ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone