pmqtest(8) [debian man page]
pmqtest(8) pmqtest(8) NAME
pmqtest - Start pairs of threads and measure the latency of interprocess communication with POSIX messages queues SYNTAX
pmqtest [-a|-a PROC] [-b USEC] [-d DIST] [-i INTV] [-l loops] [-p PRIO] [-S] [-t|-t NUM] [-T TO] DESCRIPTION
The program pmqtest starts pairs of threads that are synchronized via mq_send/mw_receive() and measures the latency between sending and receiving the message. OPTIONS
-a, --affinity[=PROC] Run on procesor number PROC. If PROC is not specified, run on current processor. -b, --breaktrace=USEC Send break trace command when latency > USEC. This is a debugging option to control the latency tracer in the realtime preemption patch. It is useful to track down unexpected large latencies of a system. -d, --distance=DIST Set the distance of thread intervals in microseconds (default is 500 us). When pmqtest is called with the -t option and more than one thread is created, then this distance value is added to the interval of the threads: Interval(thread N) = Interval(thread N-1) + DIST -f, --forcetimeout=TO Set an artificial delay of the send function to force timeout of the receiver, requires the -T option -i, --interval=INTV Set the base interval of the thread(s) in microseconds (default is 1000 us). This sets the interval of the first thread. See also -d. -l, --loops=LOOPS Set the number of loops. The default is 0 (endless). This option is useful for automated tests with a given number of test cycles. pmqtest is stopped once the number of timer intervals has been reached. -p, --prio=PRIO Set the priority of the process. -S, --smp Test mode for symmetric multi-processing, implies -a and -t and uses the same priority on all threads. -t, --threads[=NUM] Set the number of test threads (default is 1, if this option is not given). If NUM is specified, create NUM test threads. If NUM is not specifed, NUM is set to the number of available CPUs. -T, --timeout=TO Use mq_timedreceive() instead of mq_receive() and specify timeout TO in seconds. EXAMPLES
The following example was running on an 8-way processor: # pmqtest -Sp99 -i100 -d0 #0: ID10047, P99, CPU0, I100; #1: ID10048, P99, CPU0, Cycles 153695 #2: ID10049, P99, CPU1, I100; #3: ID10050, P99, CPU1, Cycles 154211 #4: ID10051, P99, CPU2, I100; #5: ID10052, P99, CPU2, Cycles 156823 #6: ID10053, P99, CPU3, I100; #7: ID10054, P99, CPU3, Cycles 158202 #8: ID10055, P99, CPU4, I100; #9: ID10056, P99, CPU4, Cycles 153399 #10: ID10057, P99, CPU5, I100; #11: ID10058, P99, CPU5, Cycles 153992 #12: ID10059, P99, CPU6, I100; #13: ID10060, P99, CPU6, Cycles 156576 #14: ID10061, P99, CPU7, I100; #15: ID10062, P99, CPU7, Cycles 157957 #1 -> #0, Min 1, Cur 8, Avg 5, Max 18 #3 -> #2, Min 1, Cur 4, Avg 5, Max 18 #5 -> #4, Min 1, Cur 5, Avg 5, Max 19 #7 -> #6, Min 1, Cur 4, Avg 4, Max 17 #9 -> #8, Min 1, Cur 9, Avg 5, Max 18 #11 -> #10, Min 1, Cur 8, Avg 5, Max 18 #13 -> #12, Min 1, Cur 4, Avg 5, Max 29 #15 -> #14, Min 1, Cur 8, Avg 4, Max 17 AUTHORS
Carsten Emde <C.Emde@osadl.org> SEE ALSO
mq_send(3p), mq_receive(3p) 0.1 pmqtest(8)
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usb_ep_descr(9S) Data Structures for Drivers usb_ep_descr(9S) NAME
usb_ep_descr - USB endpoint descriptor SYNOPSIS
#include <sys/usb/usba.h> INTERFACE LEVEL
Solaris DDI specific (Solaris DDI) DESCRIPTION
The usb_ep_descr_t endpoint descriptor defines endpoint attributes. An endpoint is a uniquely addressable portion of a USB device that is a source or sink of data. Please refer to Section 9.6.6 of the USB 2.0 specification. The USB 2.0 specification is available at www.usb.org. One or more endpoint descriptors are retrieved from a USB device during device enumeration. They can be accessed via usb_get_dev_data(9F). A endpoint descriptor has the following fields: uint8_t bLength Size of this descriptor in bytes. uint8_t bDescriptorType Set to USB_DESCR_TYPE_EP. uint8_t bEndpointAddress Endpoint address. uint8_t bmAttributes Endpoint attrib. (see below.) uint16_t wMaxPacketSize Maximum pkt size. uint8_t bInterval Polling interval for interrupt and isochro. endpoints. NAK rate for high-speed control and bulk endpoints. Endpoint descriptor bEndpointAddress bitmasks contain address number and direction fields as follows: USB_EP_NUM_MASK Address bits USB_EP_DIR_MASK Direction bit USB_EP_DIR_OUT OUT towards device USB_EP_DIR_IN IN towards host Endpoint descriptor transfer type bmAttributes values and mask: USB_EP_ATTR_CONTROL Endpoint supports control transfers USB_EP_ATTR_ISOCH Endpoint supports isochronous xfers USB_EP_ATTR_BULK Endpoint supports bulk transfers USB_EP_ATTR_INTR Endpoint supports interrupt transfers USB_EP_ATTR_MASK bmAttributes transfer-type bit field Endpoint descriptor synchronization type bmAttributes values and mask for isochronous endpoints: USB_EP_SYNC_NONE Endpoint supports no synchronization USB_EP_SYNC_ASYNC Endpoint supports asynchronous sync USB_EP_SYNC_ADPT Endpoint supports adaptive sync USB_EP_SYNC_SYNC Endpoint supports synchronous sync USB_EP_SYNC_MASK bmAttributes sync type bit field Endpoint descriptor feedback type bmAttributes values and mask for isochronous endpoints: USB_EP_USAGE_DATA Data endpoint USB_EP_USAGE_FEED Feedback endpoint USB_EP_USAGE_IMPL Implicit feedback data endpoint USB_EP_USAGE_MASK bmAttributes feedback type bit fld Endpoint descriptor additional-transaction-opportunities- per-microframe wMaxPacketSize values and mask for high speed isochronous and interrupt endpoints: USB_EP_MAX_PKTSZ_MASK Mask for packetsize bits USB_EP_MAX_XACTS_MASK Bits for additional transfers per microframe USB_EP_MAX_XACTS_SHIFT Left-shift this number of bits to get to additional-transfers-per- microframe bitfield Endpoint descriptor polling bInterval range values: USB_EP_MIN_HIGH_CONTROL_INTRVL Min NAK rate for highspd ctrl e/p USB_EP_MAX_HIGH_CONTROL_INTRVL Max NAK rate for highspd ctrl e/p USB_EP_MIN_HIGH_BULK_INTRVL Min NAK rate for highspd bulk e/p USB_EP_MAX_HIGH_BULK_INTRVL Max NAK rate for highspd bulk e/p USB_EP_MIN_LOW_INTR_INTRVL Min poll interval, lowspd intr e/p USB_EP_MAX_LOW_INTR_INTRVL Max poll interval, lowspd intr e/p USB_EP_MIN_FULL_INTR_INTRVL Min poll interval, fullspd intr e/p USB_EP_MAX_FULL_INTR_INTRVL Max poll interval, fullspd intr e/p Note that for the following polling bInterval range values, the interval is 2**(value-1). See Section 9.6.6 of the USB 2.0 specification. USB_EP_MIN_HIGH_INTR_INTRVL Min poll interval, highspd intr e/p USB_EP_MAX_HIGH_INTR_INTRVL Max poll interval, highspd intr e/p USB_EP_MIN_FULL_ISOCH_INTRVL Min poll interval, fullspd isoc e/p USB_EP_MAX_FULL_ISOCH_INTRVL Max poll interval, fullspd isoc e/p USB_EP_MIN_HIGH_ISOCH_INTRVL Min poll interval, highspd isoc e/p USB_EP_MAX_HIGH_ISOCH_INTRVL Max poll interval, highspd isoc e/p ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Architecture |PCI-based systems | +-----------------------------+-----------------------------+ |Interface stability |Committed | +-----------------------------+-----------------------------+ |Availability |SUNWusbu | +-----------------------------+-----------------------------+ SEE ALSO
attributes(5), usb_get_alt_if(9F), usb_get_cfg(9F), usb_get_dev_data(9F), usb_get_string_descr(9F), usb_parse_data(9F), usb_cfg_descr(9S), usb_ctrl_request(9S), usb_dev_descr(9S), usb_dev_qlf_descr(9S), usb_if_descr(9S), usb_other_speed_cfg_descr(9S), usb_string_descr(9S) SunOS 5.11 5 Jan 2004 usb_ep_descr(9S)